my reply from SX...
If you go for the full size wheel, then we have an SC type adaptor as one of our standard options. With a back focus of 16 mm, our OAG should focus OK, so all looks good.
Ask for a standard wheel with slim OAG and SCT adaptors on both sides.
Best regards,
Terry
From: Graham Stevens
Sent: Friday, March 13, 2015 2:35 AM
To: Terry Platt
Subject: Re: Starlight Xpress Cameras: adaptors for FLI to SX mini USB FW with OAG
Hi Terry, the line diagrams on the FLI website label the thread as a 2.013-24UNS-2B 0.371 max "SC " thread. If that makes any sense to you. The back focus of the camera is 16mm.
I am looking to get 2" filters of LRGB + Ha so I think the mini FW might be too small. In that case, is there a way of attaching the camera to the standard USB FW with OAG with an off the shelf coupler which maintains the correct back focus, or would I be getting one machined from precise parts? I already have a lodestar for the OAG.
Thanks again for your help (and excellent products!)