Highlights

• This Celestron T-Adapter connects a DSLR camera to a NexStar 4SE or C90 spotting scope for prime focus photography
• Threads onto the rear cell for secure, wiggle-free connection
• T-threads accept camera brand specific T-Ring (sold separately)

This sturdy aluminum T-Adapter is the accessory of choice if you'd like to attach an DSLR or DSLR camera to the smaller rear cell threads of a Celestron NexStar 4SE telescope or C90 spotting scope for prime focus photography.

To get started, you'll need the appropriate T-Ring for your camera body (#93402 for Nikon & #93419 for Canon EOS). Remove the lens from your camera and attach the T-ring in its place. Since the T-ring is camera-brand specific, it will snap right on just like a lens. Next, remove any accessories from the rear cell of your telescope. Screw the Celestron NexStar 4SE T-Adapter onto the rear cell threads until secure. Now, thread the T-ring & camera onto the T-Adapter. That's all there is to it. The camera is now using your telescope as a telephoto lens.  If you have an M48 T-ring, you'll need an M48 to M42 ring adapter.

Prime focus photography is popular for short exposure images of terrestrial objects as well as celestial objects like the Moon.

Side	Thread	Notes
Camera side	M42 × 0.75 (T-thread)	Accepts standard DSLR T-rings
Telescope side	~35 mm rear-cell thread	Fits NexStar 4/4SE, C90, C130