Back by Popular Demand!
GSO's Kellner eyepieces offer an affordable foray into the world of 2" eyepieces without breaking the bank. These are very good, 3-element, fully multi-coated eyepieces that provide very good flatness of field and eye relief. They feature rubber grips on the housing and foldable rubber eyeguards. GSO Kellner eyepieces are available in 3 focal lengths (26mm, 32mm and 40mm). We also include a free bolt case with each eyepiece you purchase.
Guan Sheng is a leader in optical telescopes and accessories and their products have been sold for years by the "Big Three" (Meade, Celestron and Orion) under their own brand names. Some other retailers charge more than twice as much for these very same eyepieces. We are able to offer these same high-quality Default for a lot less because of our lower overheads and markups.
GSO's eyepieces are available in many focal lengths in the 1.25" and 2" formats across three designs to suit every amateur's needs and budget. All eyepieces are fully multicoated, have blackened lens edges for improved contrast, and two end caps. Give these a try - you will not be disappointed!
| Eyepiece Series | Kellner |
|---|---|
| Focal Length | 40mm |
| Barrel Size | 2" (50.8mm) |
| Apparent Field of View (Mfg Specified) | 56° |
| Eye Relief (Designed) | 20mm |
| Filter Threads | Standard 2" Filter Thread (M48 x 0.75) |
| Coatings | Fully Multi-Coated |
| Lens Elements | 3 |
| Blackened Lens Edges | Yes |
| Barrel Security Recess | Yes |
| Protective Bolt Case | Yes - Free Agena AstroProducts Bolt Case |
| Protective Bolt Case Size | Agena 65x120mm |
| Optical Design | Kellner |
| Height (With Eyeguard Extended) | 5.0" (127mm) |
| End Caps | 2 |
| Rubber Eye Guard | Yes |
| Weight | 10.5 oz |
