Navigating Tariffs: Due to the current volatile tariff environment and associated logistics challenges, O'Telescope is unable to fulfill shipments to the United States. Orders submitted with a U.S. shipping address will be refunded, with the payment gateway transaction fee deducted. This restriction does not affect BackyardEOS or BackyardNIKON, which remain available as digital downloads.

Inventory closeout sale, everything must go. Up to 35% off. Some conditions apply.

We are closing our inventory side of the business and focusing solely on software - going back to our roots so to speak. No store coupons required, all prices have been marked down. First come, first served, until quantities last. We are no longer placing orders with manufacturers. Absolutely no rain checks. We reserve the right to cancel and refund orders at our sole discretion. We do our best to maintain our inventory accurate, but mistakes do happen, if you purchase an item that is no longer in stock, you will be refunded. The sale does not apply to some higher-end items such as 10Micron. Prices subject to change without notice. ALL SALES ARE FINAL.

Occasionally, we find a box under a box under a box in the back of the warehouse with hidden treasures, and when we do, we add these items on the site, so even though you may not find what you're looking for today, it could automagically appear next week.

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Clearance

Clearance items are new items and are 100% functional; this is a great opportunity to purchase a new item at a discounted price.

15 products

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Explore Scientific ED127mm Triplet Essential Series [ES-ED127075-03-CLEARANCE]

$1,576.37 CAD ~~$2,866.13 CAD~~

1 in stock On sale
Back Order / Waiting List

Explore Scientific: Great for astrophotography, EXPLORE SCIENTIFIC ED127MM TRIPLET ESSENTIAL SERIES can capture in stunning detail many of the night sky’s most notable treasures.

With its true diffraction-limited optics and ample aperture, this versatile model can showcase deep sky delights like the edge-on Sombrero Galaxy with its distinct bulging center or the spiraling beauty of the face-on Pinwheel Galaxy as easily as it can reveal the intricacies of the Moon’s winding Hadley Rille.

Featuring an air-spaced triplet optical design that virtually eliminates chromatic aberrations, this telescope generates brilliant high-contrast images by combining genuine HOYA extra-low dispersion (ED) glass and proprietary EMD enhanced multi-layer coatings on all optical surfaces. As an added bonus, its quick set-up allows you to spend more time at the eyepiece to make the most of your nights under the stars.

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IDAS Light Pollution Suppression Filters - D1. 28.6mm LPS D1 filter [HU-LPS-D1-286-CLEARANCE]

$147.85 CAD ~~$227.46 CAD~~

1 in stock On sale
Availability: usually ships within 10-14 days

Astro Hutech: Light pollution suppression (LPS) filters are designed to suppress the common emission lines generated by artificial lighting, yet allow the important nebula emission lines to pass, thus enhancing the contrast of astronomical objects, particularly emission nebulae.

Unlike other light pollution suppression filters, IDAS filters are specifically designed for balanced color transmission using the IDAS unique Multi-Bandpass Technology (MBT) process. The balanced transmission allows color photographs to be taken with minimal color cast to broadband emission objects such as stars, galaxies and globular clusters. The comparison photos at right demonstrate (qualitatively) that the IDAS filter maintains better color balance than other filters which have been designed for visual use.

LPS filters utilize the unique IDAS Ion Gun Assisted Deposition (IGAD*) coating technology for superior coating durability (quartz hardness) and safer cleaning. IGAD coatings also improve temperature and humidity stability of the filter performance, reducing spectrum shifts down to +/-1nm from the +/-3 or 4nm shift of standard coatings.

CCD imaging can also benefit, because although CCD imagers can already shoot through light pollution to some extent, including an LPS filter to the setup gives an added (signal-to-noise) edge

Note, however, that light pollution suppression filters are not a perfect substitute for dark skies.

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IDAS Light Pollution Suppression Filters - P2Filter. 28.6mm LPS V4 filter [HU-LPS-P2-286-CLEARANCE]

$147.85 CAD ~~$227.46 CAD~~

1 in stock On sale
Availability: usually ships within 10-14 days

Astro Hutech: The IDAS LPS-V4 filter is designed to provide maximum contrast between key astronomical emission lines and a light polluted sky. These filters incorporate IDAS MBT, UFP, and IGAD technologies to insure undegraded and extremely durable optical performance.

Features include:

Near IR is blocked completely, eliminating the need for an additional filter to block IR.
Narrower H-alpha bandpass.Â In combination with a Kenko R1 filter, this can be used as a 19nm bandpass H-alpha filter.
Retains the excellent color balance of the LPS-V3 filter when one-shot color cameras are used.
Easy creation of H-alpha enhanced color images
LPS-V4 filters are available as camera-body-mounted filters (LPS-V4-37) for Canon digital cameras or as screw-in filters for telescopes or telephoto lenses in the following sizes:

28.6 mm
48 mm
52 mm

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IDAS Light Pollution Suppression Filters - V4 Nebular Filter. 28.6mm LPS V4 filter [HU-LPS-V4-286-CLEARANCE]

$147.85 CAD ~~$227.46 CAD~~

2 in stock On sale
Availability: usually ships within 10-14 days

Astro Hutech: The IDAS LPS-V4 filter is designed to provide maximum contrast between key astronomical emission lines and a light polluted sky. These filters incorporate IDAS MBT, UFP, and IGAD technologies to insure undegraded and extremely durable optical performance.

Features include:

Near IR is blocked completely, eliminating the need for an additional filter to block IR.
Narrower H-alpha bandpass.Â In combination with a Kenko R1 filter, this can be used as a 19nm bandpass H-alpha filter.
Retains the excellent color balance of the LPS-V3 filter when one-shot color cameras are used.
Easy creation of H-alpha enhanced color images
LPS-V4 filters are available as camera-body-mounted filters (LPS-V4-37) for Canon digital cameras or as screw-in filters for telescopes or telephoto lenses in the following sizes:

28.6 mm
48 mm
52 mm

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IDAS Light Pollution Suppression Filters - V4 Nebular Filter. LPS-V4 filter for Canon APS-C frame camera [HU-LPS-V4-EOS-CLEARANCE]

$185.04 CAD ~~$284.68 CAD~~

1 in stock On sale
Availability: usually ships within 10-14 days

Astro Hutech: The IDAS LPS-V4 filter is designed to provide maximum contrast between key astronomical emission lines and a light polluted sky. These filters incorporate IDAS MBT, UFP, and IGAD technologies to insure undegraded and extremely durable optical performance.

Features include:

Near IR is blocked completely, eliminating the need for an additional filter to block IR.
Narrower H-alpha bandpass.Â In combination with a Kenko R1 filter, this can be used as a 19nm bandpass H-alpha filter.
Retains the excellent color balance of the LPS-V3 filter when one-shot color cameras are used.
Easy creation of H-alpha enhanced color images
LPS-V4 filters are available as camera-body-mounted filters (LPS-V4-37) for Canon digital cameras or as screw-in filters for telescopes or telephoto lenses in the following sizes:

28.6 mm
48 mm
52 mm

Add to cart
iOPTRON Top plate for the iOptron ball head. [IO-3308-CLEARANCE]

$16.23 CAD ~~$27.05 CAD~~

1 in stock On sale
Availability: usually ships within 10-14 days

IOptron: Top plate for the iOptron ball head.

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Pegasus Astro Pair of Black Aluminium Dovetail Brackets for UPB v2 [PEG-BRACK-UPBV2-CLEARANCE]

$51.29 CAD ~~$68.39 CAD~~

2 in stock On sale
Back Order / Waiting List

Pegasus Astro: Pair of Black Aluminium Dovetail Brackets for UPB v2

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Pegasus Astro Small Factor Top Plate for PPBADV [PEG-PLATE-PPBADV-CLEARANCE]

$25.48 CAD ~~$33.97 CAD~~

5 in stock On sale
Back Order / Waiting List

Pegasus Astro: Small Factor Top Plate for PPBADV

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Pegasus Astro Small Factor PC Base Plate for UPBv2 [PEG-PLATE-UPBV2-CLEARANCE]

$60.80 CAD ~~$81.06 CAD~~

4 in stock On sale
Back Order / Waiting List

Pegasus Astro: Small Factor PC Base Plate for UPBv2

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Pegasus Astro Pocket Powerbox Micro [PEG-PPBMICRO-CLEARANCE]

$296.64 CAD ~~$349.11 CAD~~

4 in stock On sale
Back Order / Waiting List

Pegasus Astro: Pocket Powerbox (PPB)

Pegasus Astro have equipped the PPB Micro with LED indication for power and failure states. The LED indicators can blink in patterns to warn of important power issues, such as over or under voltage. Though the light is already dim, it can be turned off using the software.

The PPB Micro comes with a watchdog that resets the device if there is no response from the controller for two seconds. This is a handy feature in the unlikely even of a controller freeze. The firmware is also upgradable to support future features and bug fixes.

Included Cables
Power Cables : Pegasus Astro has included four Dc 2.1 mm to 2.1 mm male power cables. Each are 1 meter in length.
External Environmental Sensor : Measuring 1 meter in length, the temperature and relative humidity sensor helps you know the exact environmental conditions of a user's location. The measurements are displayed in the software.

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3.0" End Cap with 2.0" compression ring opening [SI-EC30-1905-1]

$97.23 CAD ~~$194.45 CAD~~

On sale

Starlight Instruments: This is our standard End Cap for all 3" Feather Touch Focusers unless otherwise noted. It has a 2.0" compression ring and comes standard with 3 machined thumb screws

It is machined of the highest quality aluminum, and finished in our shop, keeping the same beautiful look and high precision quality that Starlight Instruments is known for

Out of Stock
William Optics Soft Carry Case for Z71, Z73, STAR71 GT71 telescope (foam is not included) [WO-BG1-P004-CLEARANCE]

$53.64 CAD ~~$89.40 CAD~~

1 in stock On sale
Back Order / Waiting List

William Optics: Soft carry case for 71mm series telescope. Made of high quality nylon fabric with water resistant coating on the inside surface. Features the company name and swan logo on the outside, carrying handles, and shoulder strap.

Please note that the case is not padded and foam is not included. This bag requires that you use the original foam that your 71mm series telescope came boxed in.

Specifications: outside dimensions of the case will be 15.75" (L) x 6.5" (W) x 12.5" (H).

Case weighs 1lb-4oz.

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ZWO Canon EOS Lens Adapter for ASI1600 & EFW [ZWO-EFW-EOS-II-CLEARANCE]

$52.57 CAD ~~$75.10 CAD~~

1 in stock On sale
Back Order / Waiting List

ZWO Optical: This ZWO EOS Lens Adapter will allow you to mount Canon EOS lenses to the ZWO EFW Electronic Filter Wheel, which would, in turn, be mounted to the ZWO ASI1600 camera.

Designed especially for the ASI1600 and EFW, this thinner EOS Lens Adapter has a T2 thread on the camera side and a female EOS bayonet mount on the lens side.

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The ZWO new EFW-Nikon-Ⅱ adapter [ZWO-EFW-NIKON-II-CLEARANCE]

$72.60 CAD ~~$103.71 CAD~~

2 in stock On sale
Back Order / Waiting List

ZWO Optical:

The ZWO new EFW-Nikon-Ⅱ adapter with 20mm thickness design is independently developed by ZWO. It’s suitable for connecting Nikon lens and ZWO 1.25”/31mm/36mm filter wheel.

The thread of the interface is M42*0.75 so it cannot be connected to 2” EFW.

It can only match with ASI cooled cameras with 6.5mm back focus length.

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ZWO 78MM ASI HOLDER RING [ZWO-NEWRINGD78-CLEARANCE]

$52.57 CAD ~~$75.10 CAD~~

1 in stock On sale
Back Order / Waiting List

This is ZWO's New Holder Ring for ASI Cooled Cameras has an internal diameter of 78 mm and is suitable for cameras with outside diameters less than 78 mm.

There is one M6 screw on the side of the holder ring, loosen the screw and easily mount the camera to your tripod.

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