Explore Scientific 100° 9mm - 2'' [ES-EPWP1009-01]

Explore Scientific: Scientific eyepiece, 9 mm focal length, 100 ° visible field, 50.8 mm (2 ").
Over the past few years, the Explore Scientific eyepieces have forged a solid reputation in terms of quality and competitive rates. Looking in an eyepiece Explore is a pleasant and easy experience, the picture is beautiful from the first glance.
This eyepiece offers an apparent wide field of 100 °, high level optical quality, surprising light transmission and correctly corrected field planarity ...
Each eyepiece of the 100 ° series is sealed and filled with an inert gas, argon. This process prevents the formation of condensation inside the eyepiece and prevents the entry of dust to maximize the lifetime of the internal coatings. To ensure watertightness, each eyepiece of the 100 ° series is factory tested by immersing it under water for 30 minutes to a depth of one meter.
All 100 ° eyepieces are fully multilayered and the edges are blackened to produce maximum contrast.
The Explore Scientific 100 ° delivers sharp, contrasting images. The apparent field of 100 ° is so wide, that you can keep in sight a celestial object observed in a non-motorized instrument.
The focal length of the Scientific 100 ° Scientific eyepiece of 9 mm predestines it at fairly high magnifications (125x on an optical tube of 1 meter of focal length). It remains versatile, adaptable to planetary observations (Moon, planets, Sun), double or multiple stars, as well as observation of planetary nebulae and the search for details in nebulae and galaxies.
The 9 mm eye relief is 12.5 mm: this means that the image remains comfortable up to a distance of 12.5 mm above the lens, to take full advantage of the field offered by the camera. ocular. This is an important detail for the viewer wearing eyeglasses, which will keep them on the nose.
The inside of the sink is threaded in M48 x 0.75 mm to accommodate filters with a diameter of 50.8 mm (2 "), Such as interference filters of type OIII, UHC, H-Beta..., Which serve to enhance contrast on many nebulae.