Zenithstar 61 without flattener - cannot get focus

[ron2310]

I connected a Nikon D5300 to Zenithstar 61 using a T-mount and 2” adapter (no flattener). I couldn’t get focus even when the focuser tube completely moved out.

Has anyone else faced this? Do I need extender tubes to move the camera more behind?

Thanks!

[bojan]

According to data sheet (https://www.siderealtrading.com.au/product/william-optics-zenithstar-61ii-apo/), FL is 360 mm, and tube length is 315 max...

So it looks like you need suitable additional extender..

[ron2310]

Thanks 👍🏻

[Stevensing]

I use fuji XT-10 with Z61 without reducer/flattener before, I can only get focus with the tube almost completely out, I guess you just need a extender.

P.S. with reducer/flattener, the tube is so much shorter.