View Full Version here: : Fine tuning spacing

18-11-2017, 04:25 PM
Hi all! :hi:
I am using a new corrector (and reducer) with my MT-160, and i should be at the 56mm of required spacing but i'm off (see attached pics of coma).
How can i tell if my spacing is too far in or out, and how can i fine tune spacing by only a few mm's? :question:
:thanx: :thumbsup:

18-11-2017, 04:52 PM
I use these in between the t thread attachments.


18-11-2017, 04:53 PM
You can get variable spacer rings, which adjust through a range and have a locking ring. Bintel has them i think, as do other places like Teleskop-Express, Agena Astro, etc.


18-11-2017, 05:47 PM
But also, could the optics be pinched? the triangular shape from my research seems to be pinched optics. :question:

19-11-2017, 10:43 AM
Hi Logan,

I had these pictures saved to my hard drive, can't remember who drew them so my apologies to the author.