William Optics M48 Nikon F T-Ring - Black - TM-NK-F-M48 threedaysale you can power and control

you can power and control the focus motor from your computer's USB port

It works on the difference between Ambient Air Temperature and the temperature of your optics

Optical Design: Includes one ED element

Halve the f-stop of your telescope for shorter exposures

The CPC 800 GPS XLT is the most portable of Celestron''s top-of-the-line fork-mounted astronomical telescopes and includes Celestron''s premium StarBright XLT coatings

William Optics M48 Nikon F T-Ring - Black - TM-NK-F-M48 threedaysale you can power and controlWilliam Optics 48 mm T Ring for Nikon F Cameras Use this aluminum black anodized T ring to attach your Nikon F camera body to an imaging accessory, etc. with M48 threads.