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These highly rated D21 eyepieces are matched to 1/100th focal length. Typically being 21.6mm, they have a 65 degree AFOV and of course are fully multi-coated.
They exhibit NO pin cushion distortion and produce amazing contrast, whether used for nighttime observations of planets, lunar and DeepSky or daytime views in white light and H-Alpha (Sun). Please be sure to ALWAYS use an appropriate protection filter when viewing the Sun!!!
The product photo shows the D21 eyepieces in a Binotron27 Super System with Filter Switch (not included with the D21 eyepieces).
Specifications:
- available focal length: 21mm
- 1.25" eyepiece barrel format
- 65 degree AFOV
- fully multi-coated on all air to glass surfaces for ultra-high efficiency transmission
- high Index Japanese glass utilized
- 20mm eye-relief
- black anodized aluminum housings and barrels with rubber
- knurled grip
- laser engraved logo
- rotating batwing eye-guards
- weight: D21: 8 oz. each
