SC-2 OAG mounting plates

Hi,

To connect my SkyWatcher 120mm Esprit Field Flattener to my FW8-8300 filter wheel I use an
adapter ring made by PreciseParts that makes a custom M62 to SBIG ST-8300 FW5/8-8300 filter wheel (thread) L = 36.6mm
(thats with the FW8-8300 adaptor plate on)

If I add the new SC-2, with the supplied 2.156" adaptor plate, how do I specify the threading on that plate?

The SC-2 adds .8" of backfocus, so the new PrecisePart adaptor would be 36.6mm - 20.32mm = 16.28mm (Correct?)

Pierre

 

Thanks for the quick reply;

I was just wondering what the threading was for the supplied adaptor plate. The 2.156" one.

From your user's manual:
"For the SC-2 we recommend using the supplied 2.156" adapter plate
and the included nosepiece since the larger aperture reduces the chance
of vignetting the guide camera.
You can optionally use your original T-thread adapter plate instead."

I just don't know the threading and diameter of the supplied 2.156" adaptor plate.

Thanks!