Optolong - CLEARANCE

29 products

1. 

   Optolong CLS Filter - Clip filter for Canon EOS APS-C Cameras [OPTO-APS-EOS-C-CLS]

   $136.12 CAD $170.15 CAD

   1 in stock On sale

   Back Order / Waiting List

   Optolong: The Optolong CLS filter will improve contrast and increase the visibility of weak outer regions on most emitted, planetary and supernova residual nebulae from polluted locations in a color imaging camera.

   The Optolong CLS-CCD filter works by specifically reducing the transmission of wavelengths of light pollution, in particular the artificial type caused by vapors of sodium vapor and mercury vapor at high and low pressure. The use of a CLS filter will also increase the contrast by reducing the light radiation caused by the neutral oxygen emissions normally observed in the atmosphere.

   The CLS EOS APS-C Clip Filter consists of multi-layered Schott glass with ion deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. The filter cell is made of light and solid metal, CNC machined, sandblasted, black anodized and then laser engraved.

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2. 

   Optolong CLS-CCD Filter - Clip filter for Canon EOS APS-C Cameras [OPTO-APS-EOS-C-CLS-CCD]

   $136.12 CAD $170.15 CAD

   1 in stock On sale

   Back Order / Waiting List

   Optolong: The Optolong CLS-CCD filter will improve contrast and increase the visibility of weak outer regions on most emitted, planetary and supernova residual nebulae from polluted locations in a color imaging camera.

   The infrared wavelength of 700-1100nm is cut on the Optolong CLS-CCD filter, which makes it different from the standard CLS filter and makes the CLS-CCD a photographic filter only. A separate IR-cut filter is not necessary when imaging with the CLS-CCD since the IR has already been cut.

   The Optolong CLS-CCD filter works by specifically reducing the transmission of wavelengths of light pollution, in particular the artificial type caused by vapors of sodium vapor and mercury vapor at high and low pressure. The use of a CLS-CCD filter will also increase the contrast by reducing the light radiation caused by the neutral oxygen emissions normally observed in the atmosphere.

   The Opterster CLS-CCD EOS APS-C Clip Filter consists of multi-layered Schott glass with ion deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. The filter cell is made of light and solid metal, CNC machined, sandblasted, black anodized and then laser engraved.

   Using a Clip Filter on Your Canon APS-C Camera

   The Optolong CLS-CCD clip filter can be inserted without tools; Simply use your fingers to insert or remove the filter. Once inserted correctly, it can not fall unintentionally.
   No modification of the Canon EOS DSLR case is required. All lens functions will work with the installed clip, including focus, screen and image stabilization,
   The Optolong fog filter prevents dust from settling on the sensor during long exposures.
   APS-C clip filters are compatible with EOS APS-C series cameras, including EOS 1100D / 600D / 60D, and so on. If you have a full frame EOS camera, Optolong also offers filters for these cameras.
   Optolong Clip filters do not work with the Canon EF-S series lenses. These lenses invade the interior space of the camera body that would normally be supported by the clip filter.
   To use the EOS / T2 and 2 "adapters to attach your camera to a telescope, you must first insert the Clip-Filter and then install the desired lens adapters.

   
   Transmission characteristics of the CLS-CCD filter

   95% transmission H-Alpha 656nm
   95% transmission OIII 496nm and 500nm
   95% transmission SII 672nm
   95% H-Beta transmission 486nm
   High transmission NII 654nm and 658nm
   0.1% Hg transmission at 435 nm and 578 nm
   0.1% Na transmission at 589 nm
   Blocks IR transmission 700-1100nm

   
   Quality filter materials:

   • Schott B260 substrate material from Germany, 1.0 mm thick
   • Anodized and CNC machined aero-metal filter cell to provide the largest net opening; Laser engraved to avoid fading
   • Several layers of cement-free anti-reflective coatings applied by evaporation from a gun to electron beams with ion assisted deposition
   • Optolong Filter Manufacturing Processes and Parameters
   • The filter substrate is optically polished at a 1/4 wave and parallelism <30 on both surfaces
   • The quality of the surface, according to MIL-O-13830, is 60/40
   • The main emission lines of nebulae have a transmission of 95%
   • Out-of-band transmission (main artificial radiation) is 0.1%
   • High-pass transmission of the bandwidth and out-of-band optical density is ensured by Optolong's planetary rotation system, a homogeneous and precise coating procedure
   • Each filter comes with a plastic housing with high-pressure EVA liner
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3. 

   Optolong H-Alpha 7nm Filter - Clip filter for Canon EOS APS-C Cameras [OPTO-APS-EOS-C-HA7NM]

   $255.60 CAD $319.50 CAD

   1 in stock On sale

   Back Order / Waiting List

   Optolong: The Optolong H-Alpha 7nm is a very narrow emission-line filter that works by permitting a 7nm bandwidth of light, focused on the 656nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths. Wavelengths that are in charge of natural light pollution, or skyglow, are radically decreased, as is artificial light pollution brought about by high and low pressure sodium and mercury vapor lights. The outcome is a high contrast image that uncovers the H-alpha line in all its brilliance.

   This Optolong H-Alpha EOS APS Clip filter will give a well defined contrast between the skyglow ackground and H-alpha transmitting objects, but since it has a FWHM of only 7nm, you won't see the same number of stars in the last picture as you would with the Optolong 12nm H-Alpha Filter. Utilize this filter alone for CCD or DSLR imaging, or utilize together with OIII 6.5nm and SII 6.5nm filters to get a tricolor picture of vaporous nebulae from light polluted areas.

   The Optolong EOS APS H-Alpha 7nm Filter is made with Schott glass that has been multi-coated with  ion-assisted deposition technology to guarantee scratch resistance and soundness on the central wavelength, or CWL. The filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and  finally laser engraved.

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4. 

   Optolong L-Pro Filter - Clip filter for Canon EOS APS-C Cameras [OPTO-APS-EOS-C-LPRO]

   $290.06 CAD $362.58 CAD

   5 in stock On sale

   Back Order / Waiting List

   Optolong: The L-Pro filter from Optolong is a multi-bandpass filter that works well for photographic use with your Canon EOS APS DSLR. Better color balance is achieved by maximizing the transmission band, allowing you to produce images of broadband emission objects with nominal color cast.

   By reducing the transmission of artificial and natural light pollution, including neutral oxygen (skyglow) as well as light given off from mercury and sodium vapor lamps, the background sky will become darker, allowing the good stuff to shine through. High transmission of main nebulae emission lines at OIII, H-Beta, NII, H-alpha, and SII, when combined with the precision off-band blocking of contrast-killing light pollution, makes this filter perfect for most emission nebulae, reflection nebula, and dark nebulae.

   The Optolong EOS APS Clip L-Pro Filter is made with Schott glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. The filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and then laser engraved.

   Using a Clip Filter on your Canon APS-C Camera

   The Optolong EOS APS Clip filter can be inserted without tools; just use your fingers to insert or remove the filter. Once inserted correctly, it cannot unintentionally fall out.
   No changes to the housing of Canon EOS DSLR are required. All lens functions will work with the Clip installed, including focus, screen, and image stabilization,
   The Optolong clip filter prevents dust from settling on the sensor during long exposures.
   The APS-C clip filters are compatible with EOS APS-C series cameras, including EOS 1100D/600D/60D, etc. If you have a full frame EOS camera, Optolong offers clip filters for these cameras as well.
   Optolong Clip Filters do not function with the Canon EF-S series lenses. These lenses invade the space inside the camera body that would normally be taken up by the clip filter.
   To use EOS/T2 and 2” adapters to attach your camera to a telescope you’ll need to insert the Clip-Filter first and then install the desired lens adapters.
   Quality Filter Materials:

   Schott B260 substrate material from Germany, 1.0mm thick
   CNC machined and black anodized aero-metal filter cell that is ultra-thin to provide largest clear aperture; Laser-engraved to prevent fading
   Multiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition
   Optolong Filter Manufacturing Processes and Parameters

   Filter substrate is fine-optically polished to 1/4 wave and <30 parallelism over both surfaces
   Surface quality, according to MIL-O-13830, is 60/40
   High transmission at major nebula emission lines (i.e. H-alpha 656nm, OIII 496nm and 500nm, SII 672nm and H-beta 486nm)
   Precision off-band blocking, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm and 578nm)
   High value transmission of pass-band and optical density of off-band is assured through Optolong’s planetary rotation system, a homogenous and precise coating procedure
   Each filter comes with a plastic case with high pressure EVA case lining

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5. 

   Optolong 1.25'' CLS light-pollution filter [OPTO-CLS-125]

   $67.18 CAD $83.98 CAD

   2 in stock On sale

   Back Order / Waiting List

   Optolong: The CLS (City Light Suppression) broadband filter is designed to improve the visibility of various deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) as well as SII ( 672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area.

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6. 

   Optolong 2'' CLS light-pollution filter [OPTO-CLS-2]

   $101.66 CAD $127.07 CAD

   2 in stock On sale

   Back Order / Waiting List

   Optolong: The CLS (City Light Suppression) broadband filter is designed to improve the visibility of various deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) as well as SII (672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area.[/extract]

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7. 

   Optolong 1.25'' CLS-CCD light-pollution filter [OPTO-CLS-CCD-125]

   $114.29 CAD $142.86 CAD

   2 in stock On sale

   Back Order / Waiting List

   Optolong: The CLS-CCD broadband filter is designed to improve the visibility of various deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) as well as SII (672nm), the filter is suitable for enhancing the contrast and details for photograghic purpose at light pollution area.

     Add to cart
8. 

   Optolong 2'' CLS-CCD light-pollution filter [OPTO-CLS-CCD-2]

   $186.67 CAD $233.34 CAD

   3 in stock On sale

   Back Order / Waiting List

   Optolong: The CLS-CCD broadband filter is designed to improve the visibility of various deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) as well as SII (672nm), the filter is suitable for enhancing the contrast and details for photograghic purpose at light pollution area.[/extract]

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9. 

   Optolong H-Alpha 7nm (1.25'') CCD Filter [OPTO-HA7-125]

   $205.05 CAD $256.31 CAD

   2 in stock On sale

   Back Order / Waiting List

   Optolong: H-Alpha 7nm filter is the most popular narrow band filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Best choice of narrow band H-alpha astrophotography filter for highest contrast and revealing subtle nebula details.

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10. 

    Optolong H-Alpha 7nm (2'') CCD Filter [OPTO-HA7-2]

    $301.55 CAD $376.94 CAD

    2 in stock On sale

    Back Order / Waiting List

    Optolong: H-Alpha 7nm filter is the most popular narrow band filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Best choice of narrow band H-alpha astrophotography filter for highest contrast and revealing subtle nebula details.

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11. 

    Optolong 1.25'' IR Pass 685 nm Planetary Filter [OPTO-IRPASS-125]

    $94.76 CAD $118.45 CAD

    On sale

    Optolong: IR Pass 685nm filter is designed to block wavelengths below 670nm and can be used in IR-LRGB imaging to produce a sharper luminance image for the best planetary contrast as atmospheric seeing and distortion is much reduced at longer IR wavelengths.The sensor of CCD or CMOS cameras is capable of detecting light in the 350-1100nm range including infrared wavelengths. Thus RGB planetary images taken with IR as the luminance channel have visible-enhanced contrast and surface detail than standard LRGB images.

    Out of Stock
12. 

    Optolong 2'' IR Pass 685 nm Planetary Filter [OPTO-IRPASS-2]

    $140.71 CAD $175.89 CAD

    2 in stock On sale

    Back Order / Waiting List

    Optolong: IR Pass 685nm filter is designed to block wavelengths below 670nm and can be used in IR-LRGB imaging to produce a sharper luminance image for the best planetary contrast as atmospheric seeing and distortion is much reduced at longer IR wavelengths.The sensor of CCD or CMOS cameras is capable of detecting light in the 350-1100nm range including infrared wavelengths. Thus RGB planetary images taken with IR as the luminance channel have visible-enhanced contrast and surface detail than standard LRGB images.

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13. 

    Optolong 1.25'' L-eNhance light-pollution filter [OPTO-L-ENHANCE-125]

    $209.65 CAD $262.06 CAD

    10 in stock On sale

    Back Order / Waiting List

    Optolong: About L-eNhance Filter
    The relentless spread of urbanization and its associated light pollution have become a growing problem for all amateurs and astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel.

    L-eNhance provides an economical and practical solution for amateurs. It is a dual-band pass filter which has been designed for DSLR (digital SLR), color CMOS and CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily light-polluted areas. 

    Optolong believes the design of our L-eNhance filter is a technical innovation among filters. It effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum transmission of up to 90%. The performance of this filter delivers images that superbly control the impact from light polluted skies.

    Hydrogen is the largest, the most primitive, the simplest, and the oldest element in the universe. Scientists 
    consider that Hydrogen amounts to more than 90% of visible substance in space. Our sun is 5 billion years old, 
    but so far hydrogen is still the key matter of nuclear fusion. While the sulfur element does not have much 
    scientific significance, so keeping H and O is meaning for exploration of life.
    Therefore, we highlight H-a, H-b, O3 and O2, and reduce the signal of sulfur

    L-eNhance Filter Spectrum Curve
    According to the characteristics of celestial body emission lines and feature of light pollution span of spectrum, Optolong specially designed and optimized dual-band L-eNhance filter in order to retain the prominent color of nebula RGB while blocking out most of light pollution.

    Package Details 
    Silver cardboad box
    Plastic PP box
    Imported high pressure EVA case lining

    Warm Prompt
    About Color: Light, computer display and other reasons, pictures and objects may slightly chromatic aberratio (color fifference), please refer to the material item

    About Coating: Interferential filter to change surface color depending upon light and movement. Please in kind prevail.

    About Product Object: All of specifications change in order to  improve product quality. We ask your understand if any update informations publish delay.

    About Product Overview: Please note that this series of filter as same as specifications, processing technic, test methods. It is only size difference.

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14. 

    Optolong 2'' L-eNhance light-pollution filter [OPTO-L-ENHANCE-2]

    $267.09 CAD $333.86 CAD

    8 in stock On sale

    Back Order / Waiting List

    Optolong: About L-eNhance Filter
    The relentless spread of urbanization and its associated light pollution have become a growing problem for all amateurs and astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel.

    L-eNhance provides an economical and practical solution for amateurs. It is a dual-band pass filter which has been designed for DSLR (digital SLR), color CMOS and CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily light-polluted areas. 

    Optolong believes the design of our L-eNhance filter is a technical innovation among filters. It effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum transmission of up to 90%. The performance of this filter delivers images that superbly control the impact from light polluted skies.

    Hydrogen is the largest, the most primitive, the simplest, and the oldest element in the universe. Scientists 
    consider that Hydrogen amounts to more than 90% of visible substance in space. Our sun is 5 billion years old, 
    but so far hydrogen is still the key matter of nuclear fusion. While the sulfur element does not have much 
    scientific significance, so keeping H and O is meaning for exploration of life.
    Therefore, we highlight H-a, H-b, O3 and O2, and reduce the signal of sulfur

    L-eNhance Filter Spectrum Curve
    According to the characteristics of celestial body emission lines and feature of light pollution span of spectrum, Optolong specially designed and optimized dual-band L-eNhance filter in order to retain the prominent color of nebula RGB while blocking out most of light pollution.

    Package Details 
    Silver cardboad box
    Plastic PP box
    Imported high pressure EVA case lining

    Warm Prompt
    About Color: Light, computer display and other reasons, pictures and objects may slightly chromatic aberratio (color fifference), please refer to the material item

    About Coating: Interferential filter to change surface color depending upon light and movement. Please in kind prevail.

    About Product Object: All of specifications change in order to  improve product quality. We ask your understand if any update informations publish delay.

    About Product Overview: Please note that this series of filter as same as specifications, processing technic, test methods. It is only size difference.

      Add to cart
15. 

    Optolong 2'' L-eXtreme Dual Narrowband Filter [OPTO-L-EXTREME-2]

    $359.00 CAD $448.75 CAD

    On sale

    The Optolong 2" L-eXtreme Dual Band filter is a 7nm bandpass filter that isolates the H-Alpha and Oxygen III emission lines to maximize the signal-to-noise ratio between nebulae. When compared to the Optolong L-eNhance tri-band filter, the dual band only emits the Ha and OIII emission lines rather than the L-eNhance filters transmission of Hb, Ha, and OIII. Optolong has ensured that the L-eXtreme filters do not transmit between H-beta and OIII lines, as there are no nebula lines there. Limiting the transmission this way means that light pollution is blocked so nebula signals are boosted and the background of the sky becomes darker for better contrast during imaging. For those who live in areas with higher levels of light pollution or for those who would like to image during times where the Moon is bright, this threaded L-eXtreme filter is an excellent tool for their astrophotography toolbox!

    When it comes to quality control Optlong ensures that each filter is examined by Spectrophotometer and Laser Interferometer for spectrum characteristics and surface accuracy respectively. During the manufacturing process, high-precision grinding and polishing is used to ensure that the substrate parallelism is greater than 30" and the surface accuracy is better than λ/4. Electron-beam gun evaporation and Ion-assisted deposition (IAD) coating is applied to provide durability and resistance to scratching. IAD increases film firmness, consolidates membrane compactness, and changes vacuum coating material characteristics. This type of manufacturing technology also provides stability on the central wavelength so there is no deviation during temperature changes.

    
    L-eXtreme Dual Band Filter Specifications

    Substrate: B270
    Filter Size: 2"
    Thickness: 1.85mm
    FWHM: OIII 7nm+Ha 7nm
    Blocking range: 300-1000nm
    Blocking depth: light pollution line blocking >99%
    Surface quality: 60/40
    Transmitted Wavefront RMS: λ/4
    Parallelism: 30s

    Out of Stock
16. 

    Optolong 1.25'' L-Pro light-pollution filter [OPTO-L-PRO-125]

    $175.18 CAD $218.98 CAD

    4 in stock On sale

    Back Order / Waiting List

    Optolong: The L-Pro (L-Professional) filter is designed to improve the visibility of various deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII( 496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) as well as SII (672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.

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17. 

    Optolong 2'' L-Pro light-pollution filter [OPTO-L-PRO-2]

    $232.62 CAD $290.78 CAD

    8 in stock On sale

    Back Order / Waiting List

    Optolong: The L-Pro (L-Professional) filter is designed to improve the visibility of various deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) as well as SII (672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.

      Add to cart
18. 

    Optolong 1.25'' LRGB Filter [OPTO-LRGB-125]

    $290.06 CAD $362.58 CAD

    2 in stock On sale

    Back Order / Waiting List

    Optolong Filters: The LRGB filter set is designed for maximum contrast and with extremely high gradients for clear differentiation of colors. The LRGB filter set divides the spectrum into its components red, green, blue and luminance. OIII emission overlaps on blue and green filters with maximum transmission to allow high efficiency and natural color imaging. Gap between green and red filters serves to block out the primary Sodium light pollution line at 589nm and improves color balance and separation.

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19. 

    Optolong 2'' LRGB Filter [OPTO-LRGB-2]

    $416.44 CAD $520.55 CAD

    5 in stock On sale

    Back Order / Waiting List

    Optolong: The LRGB filter set is designed for maximum contrast and with extremely high gradients for clear differentiation of colors. The LRGB filter set divides the spectrum into its components red, green, blue and luminance. OIII emission overlaps on blue and green filters with maximum transmission to allow high efficiency and natural color imaging. Gap between green and red filters serves to block out the primary Sodium light pollution line at 589nm and improves color balance and separation.

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20. 

    Optolong 1.25'' Moon & Skyglow Planetary Filter [OPTO-MOONSKY-125]

    $40.76 CAD $50.95 CAD

    1 in stock On sale

    Back Order / Waiting List

    Optolong: Moon & Skyglow filter is designed to darken the background sky by blocking light transmission from skyglow 589nm and many street light emissions from artificial light. Its high efficiency preserves image brightness, reveals more details and increases contrast of moon, galaxies, nebulae and globular star clusters.

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21. 

    Optolong 2'' Moon & Skyglow Planetary Filter [OPTO-MOONSKY-2]

    $59.14 CAD $73.93 CAD

    2 in stock On sale

    Back Order / Waiting List

    Optolong: Moon & Skyglow filter is designed to darken the background sky by blocking light transmission from skyglow 589nm and many street light emissions from artificial light. Its high efficiency preserves image brightness, reveals more details and increases contrast of moon, galaxies, nebulae and globular star clusters.

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22. 

    Optolong OIII-CCD 6.5nm (1.25'') CCD Filter [OPTO-OIII-CCD65-125]

    $186.67 CAD $233.34 CAD

    1 in stock On sale

    Back Order / Waiting List

    Optolong: Extra Narrowband OIII-CCD 6.5nm filter is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). OIII emits 495.9nm and 500.7nm and it is a blue-green colored filter. Many of images of planetary nebula and supernova remnants are taken only with H-alpha and OIII filters. They show great structural details, but have natural colors, looking like an RGB image.

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23. 

    Optolong OIII-CCD 6.5nm (2'') CCD Filter [OPTO-OIII-CCD65-2]

    $296.96 CAD $371.20 CAD

    5 in stock On sale

    Back Order / Waiting List

    Optolong: Extra Narrowband OIII-CCD 6.5nm filter is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). OIII emits 495.9nm and 500.7nm and it is a blue-green colored filter. Many of images of planetary nebula and supernova remnants are taken only with H-alpha and OIII filters. They show great structural details, but have natural colors, looking like an RGB image.

      Add to cart
24. 

    Optolong SII-CCD 6.5nm (1.25'') CCD Filter [OPTO-SII-CCD65-125]

    $186.67 CAD $233.34 CAD

    1 in stock On sale

    Back Order / Waiting List

    Optolong: Extra narrow band SII-CCD 6.5nm filter (Sulful II for CCD) is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

      Add to cart
25. 

    Optolong SII-CCD 6.5nm (2'') CCD Filter [OPTO-SII-CCD65-2]

    $291.22 CAD $364.02 CAD

    3 in stock On sale

    Back Order / Waiting List

    Optolong: Extra narrow band SII-CCD 6.5nm filter (Sulful II for CCD) is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

      Add to cart
26. 

    Optolong 1.25'' UHC Nebula filter [OPTO-UHC-125]

    $67.18 CAD $83.98 CAD

    4 in stock On sale

    Back Order / Waiting List

    Optolong: The UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha(656nm) as well as SII (672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.

      Add to cart
27. 

    Optolong 2'' UHC Nebula filter [OPTO-UHC-2]

    $101.66 CAD $127.07 CAD

    2 in stock On sale

    Back Order / Waiting List

    Optolong: The UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) as well as SII (672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.

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28. 

    Optolong UV-IR Cut 1.25'' Filter [OPTO-UV-IR-125]

    $54.55 CAD $68.19 CAD

    On sale

    Optolong: UV-IR cut filter is designed for ultraviolet and infrared wavelength blocking to improve sharpness of the image as most of the optics are designed for the visible spectrum, because it’s very difficult to create a lens with the same focal point for the visible and IR spectrum.It is used on a digital camera and the video, which do not have an IR protection filter toward an image sensor or were remodeled. This is important because unfiltered CCD and CMOS sensors are extremely susceptible to UV and IR rays just outside the visible spectrum that can have a very negative impact on image quality.

    Out of Stock
29. 

    Optolong UV-IR Cut 2'' Filter [OPTO-UV-IR-2]

    $78.67 CAD $98.34 CAD

    On sale

    Optolong: UV-IR cut filter is designed for ultraviolet and infrared wavelength blocking to improve sharpness of the image as most of the optics are designed for the visible spectrum, because it’s very difficult to create a lens with the same focal point for the visible and IR spectrum.It is used on a digital camera and the video, which do not have an IR protection filter toward an image sensor or were remodeled. This is important because unfiltered CCD and CMOS sensors are extremely susceptible to UV and IR rays just outside the visible spectrum that can have a very negative impact on image quality.

    Out of Stock