OAG measurements

jujumaster

I am trying to get my OAG camera to focus with my 1600mm-c camera. I am using the OAG mounted directly to the EFW and then the camera. I can't find any drawings or dimensions that provide the distance from the prism to the top of the OAG. Am I missing something?

Also, I am mounting the OAG directly to the EFW but it seems that the OAG 1.25" mounting ring and EFW bang into each other. It seems that you need a spacer here. This would increase the back focus further. Is there a standard spacer for this purpose?

Thanks,

Ian S.

biancak

jujumaster wrote:
I am trying to get my OAG camera to focus with my 1600mm-c camera. I am using the OAG mounted directly to the EFW and then the camera. I can't find any drawings or dimensions that provide the distance from the prism to the top of the OAG. Am I missing something?

Also, I am mounting the OAG directly to the EFW but it seems that the OAG 1.25" mounting ring and EFW bang into each other. It seems that you need a spacer here. This would increase the back focus further. Is there a standard spacer for this purpose?

Thanks,

Ian S.

Hi Ian

I think this will work. ASI1600MM-C+EFWmini+T2 to T2 (from EFWmini kit)+11mm T2 ring (from ASI1600 kit)+AOG+T2 extender 18.5mm (from ASI1600 kit) will give you the correct setup.

I havent measured it but I think the T2 to T2+11mm T2 ring will give you 12mm space between the EFW and AOG, which then should focus.

I got this idea by looking at one of Sam's facebook posts.