Help needed: ZS61 and ZWO 183mc pro backfocus | Astrobiscuit | Page 1

opaque raft Feb 19, 2025, 2:00 PM

#

I have it set to 12.9mm

#

However, my stars are clearly elongated

pliant cypress Feb 19, 2025, 4:23 PM

#

You need to add spacers until you reach the required backfocus. The camera itself has a backfocus of 6.5mm with an 11mm spacer making 17.5mm in total. Usually field flatteners require 55mm but that can change.

opaque raft Feb 19, 2025, 4:30 PM

#

pliant cypress You need to add spacers until you reach the required backfocus. The camera itsel...

yeah I believe I already fixed it. I have now a construct with roughly 50mm and adding the backfocus of the camera I should get to 55mm with a little tweaking

#

thank you 😄

#Help needed: ZS61 and ZWO 183mc pro backfocus