Product Details
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 | 4mm |
Barrel Size | 1.25" (31.7mm) |
Apparent Field of View (Mfg Specified) | 50° |
Eye Relief (Designed) | 2.3mm |
Filter Threads | Standard 1.25" Filter Thread (M28.5 x 0.6) |
Lens Elements | 4 |
Lens Groups | 2 |
Barrel Safety Recess | Yes |
Barrel Type | With safety undercut |
Protective Plastic Storage Container | Yes - Free Agena Eyepiece Container |
Protective Plastic Storage Container Size | Agena 42x60mm |
Optical Design | Plossl |
Weight | 2.47 oz / 70g |