| This is a zoom eyepiece for digiscoping (and incidental visual observing) with Nikon 65mm and 82mm ProStaff spotting scopes. The eyepiece has a groove machined around its top rim that is exposed when the flat rubber eyecup for visual observing is removed from the eyepiece. This groove interlocks with a Nikon digiscoping adapter (Field Scope Bracket) for high magnification afocal (through both the camera lens and the eyepiece) nature photography with a Nikon Coolpix digital camera and a Nikon ProStaff spotting scope.
For Nikon Coolpix cameras 7900, 5200, and 4200 only, this eyepiece should be used with Nikon Field Scope Bracket FSB-1A (our part #6957).
For Nikon Coolpix cameras 5600 and 4600 only, this eyepiece should be used with Nikon Field Scope Bracket FSB-2 (our part #6956).
For Nikon Coolpix cameras P1 and P2 only, this eyepiece should be used with Nikon Field Scope Bracket FSB-3 (our part #6958).
For Nikon Coolpix cameras P3 and P4 only, this eyepiece should be used with Nikon Field Scope Bracket FSB-4 (our part #8328).
For Nikon Coolpix cameras S1, S3, S5, S6, S7, S7c, and S8 only, this eyepiece should be used with Nikon Field Scope Bracket FSB-5 (our part #8329).
The visual field of view of the eyepiece with each ProStaff is not specified in the Nikon literature. However, it appears on examination to be similar to the field of the standard Nikon ProStaff zoom eyepiece. Eye relief is likewise not specified, as the eyepiece is designed primarily for digiscoping, with visual observing being only a secondary use. However, it likewise appears to be similar to that of the standard NPZ eyepiece.
Visual magnifications are as follows: 16-48x with a 65mm ProStaff and 20-60x with an 82mm ProStaff. Photographic magnifications and fields of view will vary, depending on the camera used and the zoom setting of the camera lens and the eyepiece.
Because of the modifications to the eyepiece body needed to convert it to digiscoping use, a twist-up eyecup for visual observing without eyeglasses could not be incorporated into this eyepiece. Accordingly, only a flat rubber eyecup is provided to slip over the grooved top of the eyepiece to keep eyeglasses from being scratched accidentally when the eyepiece is used visually. Observers who do not need eyeglasses when observing may find it a little more difficult to properly position their eye at the proper distance behind the eyepiece without a twist-up eyecup to guide them. In addition, contrast will be somewhat reduced due to the lack of an eyecup to block ambient light for the non-eyeglass observer.
The optics are fully multicoated, using Nikon’s proprietary antireflection coatings, for high light transmission and contrast. The eyepiece threads into place. To prevent accidental loss in the field, a rubber O-ring at the base of the eyepiece threads compresses as the eyepiece is screwed into the scope body. This locks the eyepiece in place to keep it from vibrating loose during transport and use. Slip-on dust covers are provided for both ends of the eyepiece, rubber for the observer side of the eyepiece and plastic for the scope side. A Cordura nylon-style bag with drawstring-closure is provided for carrying and storage of the eyepiece.
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