92° 17mm Waterproof Eyepiece Apochromat As a field flattener

As a field flattener

except the twist lock rings

especially for eyeglass wearers or for those with fast telescopes who can really push high magnification eyepieces

Larger 40 mm optical window offers a wider field of view so you can acquire targets quickly and easily

exclude counterweight Mount weight 17

92° 17mm Waterproof Eyepiece Apochromat As a field flattenerFeatures The Explore Scientific 92 Series eyepieces are hyper wide class oculars that can transform your visual astronomy experience. You may be startled at the amazingly wide expanse of inky black sky you behold the first time you bring your eye to a 92 Series eyepiece, and after awhile, you may even forget that you have an eyepiece between you and the universe! With an apparent field of view that is close to the maximum for hyper wide eyepiece