The 2-group 4- element Plossl series eyepieces offer flat and clear images with good color correction. The NPL20, NPL25, NPL30 and NPL40 eyepieces feature a twist-up eye cup.
| Eyepiece Series | NPL Plossl |
|---|---|
| Focal Length | 20mm |
| Barrel Size | 1.25" (31.7mm) |
| Apparent Field of View (Mfg Specified) | 50° |
| Eye Relief (Designed) | 15mm |
| Lens Elements | 4 |
| Lens Groups | 2 |
| Barrel Security Recess | Yes |
| Protective Bolt Case | Yes - Free Agena AstroProducts Bolt Case |
| Protective Bolt Case Size | Agena 52x80mm |
| Optical Design | Plossl |
| Weight | 3.88 oz |
