Pentax premium spotting scopes adhere to the American standard of 1.25" eyepiece thread diameter, facilitating the use of eyepieces from independent manufacturers. That also means, of course, that the wonderful Pentax eyepieces can be used in other telescopes and spotting scopes which accept 1.25" eyepieces.
All of the Pentax eyepieces exhibit an apparent field of view of greater than 50°, which is the generally agreed-upon maximum viewing field that an observer has in their non-peripheral vision. You'll feel like you are surrounded in space with a distortion-free portal to distant scenes at your disposal.
Features :
- Waterproof & fogproof with minimum eye relief of 18mm
- USA Standard 1.25" eyepiece threading diameter
- Accepts conventional 1.25" diameter filters for astronomical and terrestrial applications .
Specifications :
- Magnification : 21-63x with the PF-80ED
22-65x with the PF-80ED-A
26-78x with the PF-100ED
- Angle of View : 1.8-1.0° with 80mm scopes
1.5-0.8° with the PF-100ED
- Field-of-View (@ 1000 Yds) : 93-49' (31-17 m at 1000 m) with 80mm scopes
78-42' (26-14 m at 1000 m) with the PF-100ED
- Exit Pupil Diameter : 3.8-1.3mm with 80mm scopes
3.8-1.3mm with the PF-100ED
- Eye Relief: 18-22mm
- Relative Brightness:
14.5-1.6 with 80mm scopes
14.8-1.6 with the PF-100ED
- Twilight Factor : 41.0-71.0 with 80mm scopes
51.0-88.3 with the PF-100ED
- Weatherproofing: Waterproof/Fogproof
- Dimensions: 2.7 x 5.7"
- Weight: 1.21 lb
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