ASI1600, ASI120, OAG and sync-focus

jbrazio

Hi all,

I have the following imaging train: ASI1600MM-C (6.5) - ZWO EFW (20) - M42-M42 - T2 spacer (11mm) - M42-M48 (16,5) - 0.85x FF

I'd like to install the ZWO OAG instead of the M42-M48 (16.5mm) which seems to be a direct replacement, this will give in total the 55mm required.

I'd like not to have to mess with the focusing thing on the OAG-guide side, i.e. have both ASI cameras in perfect sync-focus only by adjusting the drawtube.

My main question relates with what is required to make an ASI120MM-C focus in sync with the main ASI1600.

I already found out that for cameras like the ASI120 on the OAG require at least a 5mm spacer but does the distance between the ASI120 and the FF need to be 55mm so I need to add an additional 37.5 spacer to it ?

Thanks.

Support@ZWO

OAG have a 5mm extender on it. it is removable.