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Better light transmission with Nikon's multilayer-coated lenses
Nikon's multilayer-coated lenses and prisms enable extra-bright viewing, achieving 10 % more light transmission compared to previous models. Nikon optical excellence and the role of ED glass
When light rays pass through normal optical glass, the red and blue light rays bend at slightly different angles.
This dispersion results in colour fringing and lack of sharpness. Modern techniques to correct this chromatic aberration are effective with normal and wideangle lenses. But telescopic lenses magnify the slight variation in focus between red and blue light rays.
So Nikon developed ED (Extra-low Dispersion) glass which is especially designed to provide precise optical colour correction. The result ? Brighter, clearer viewing with remarkable resolution.
Photographic attachment --- convert your Fieldscope into a powerful lens for some of Nikon SLRs
Ever wish you could record the beauty of every bird you spot in your scope ? Thanks to Nikon, you can. The optional 35mm(135) format photographic attachment lets you transform Fieldscope models III / III A / EDIII / EDIII A into 800 mm (1,000 mm with the Fieldscope ED78 / ED78A) super-telephoto lenses for some of Nikon SLR cameras. The attachment's built-in lenses --- with Nikon's famed optical quality and sophisticated, four (4)-elements-in-four (4)-groups lens construction --- make it a powerful photographic tool.
Magnification:
20 × (when used with 20 × eyepiece)
Angular FoV - Real / degree:
3.0 degree (when used with 20 × eyepiece)
Angular FoV - Apparant / degree:
60.0 degree (when used with 20 × eyepiece)
FoV at 1000 m:
52 m (when used with 20 × eyepiece)
Exit pupil:
3.0 mm (when used with 20 × eyepiece)
Relative brightness:
9.0 (when used with 20 × eyepiece)
Close focusing distance:
5.0 m
1. Nikon Field Scope III main body
2. Eeyepiece lens cover
3. Softcase for main body
4. Shoulder strap for soft case
5. Warranty Card