The Bresser's 70°-Series 25mm Eyepiece provides users with an easy and affordable upgrade to standard 1.25" diameter barrel Plossl eyepieces. Its 70 apparent field of view gives users a broad view of the sky while the five-element lens configuration and anti-reflection fully multicoated optics maximize light transmission to ensure the brightest possible images with minimal distortion across the entire field of view. A fold-down rubber eyecup prevents stray light from leaking into your eye's peripheral vision, a textured collar provides a non-slip grip when handling it, and a double-tapered barrel enables smooth insertion and removal from the focuser.
|Eyepiece Series||Bresser 70° Series|
|Focal Length||10 - 35mm|
|Barrel Size||10 - 20mm -1.25" (31.7mm) |
25 - 35mm - 2"
|Apparent Field of View (Mfg Specified)||70°|
|Filter Threads||Standard 1.25" Filter Thread (M28.5 x 0.6)|
|Blackend Lens Edges||Yes|
|Barrel Type||Tapered barrel|
|Height (With Eyeguard Extended)|
|Rubber Eye Guard||Yes|
1.25" barrel for 10mm to 20mm focal length
2" barrel for 25 to 35 mm focal length
These are exactly the same as the Explore Scientific Eyepieces, except they are not waterproof. So don't go out observing in the rain, or in a pool!