This item allows photography with Nikon F-mount 35mm or digital SLR cameras and the fabulous line of Nikon Fieldscopes.  It is not used in conjunction with an eyepiece, but rather you remove the eyepiece and attach this device where the eyepiece would normally attach to the Fieldscope.  You then attach you F-mount camera to the side of this device which is not screwed into the Fieldscope, and you're ready to shoot.

All ventures in the world of photographing with your spotting scope require the use of a sturdy tripod, first and foremost.

All ventures in the world of telescope photography require the use of a sturdy tripod, first and foremost.  Logical choices for a tripod/head combination are indicated here as accessories, with an ascending order in price & support.  You must take great care to keep vibrations during exposure to an absolute minimum.  Employing a cable release, electronic release or remote control for tripping the shutter is absolutely necessary.  And while it is not necessary per se, a mounting bracket will do wonders to reduce vibrations of your rig.

Note! Your camera will need to be in manual exposure mode, although some Nikon cameras may also work in aperture-priority autoexposure mode.  Additionally, the switch on the camera which chooses the focus mode must indicate manual focusing.