RCOS 70mm Series - Fixed Instruments Adapter (spacers)...

Remove your Rear Cell focuser and install a "Fixed Instruments Adapter" to:

- Eliminate focuser drift and flexure.
- Added "Bolt-on" security for your expensive camera and accessories.
- Save weight.

Shown here on an RCOS 10" Ritchey-Chrétien.

RCOS Astro Physics 2.7 inch compatible (AP2.7) "Fixed Instruments Adapter Spacers" can be used with all RCOS Telescopes. RCOS manufacturers spacers intended to be compatible with the Astro Physics 2.735 x 24 thread. Each spacer has internal knife edge light stops to reduce or eliminate stray light.

Sizes (in length) available:

0.625 inches.
0.750 inches.
0.875 inches.
1.00 inches.
1.25 inches
1.75 inches
2.50 inches.
2.875 inches.
0.1875 washers.

FIA 70mm - $65 each