Astro-Physics SPL 4mm

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Brand and Model:Astro-Physics SPL 4mm
Price ($USD):245
Type:Super Planetary
Focal Length:4 mm
Barrel Size:1.25
Apparent FOV:42.0 degrees
Field Stop Dia.:0.0 mm
Eye Relief:5 mm
Weight (lbs):

Field size - 3.9mm
Number of elements - 3
Barrel - 1.25" polished stainless steel
Apparent field - 42 degrees
Eye relief - varies from 125% (4mm) to 140% (8-12mm) of the focal length
Operating range - from F4 upward
Broadband multi-coated on all surfaces
Top - conical non-metallic surface to resist fogging and prevent freezing to skin

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