E_ri_k
24-09-2012, 10:18 PM
Hey everyone, I have been having trouble with my Orion OAG and GSO RC10. I managed to collimate the scope on Achernar tonight, then moved on to setting up the OAG. Got my imaging camera focused, and then after a lot of mucking around trying to find a star, got a reasonable focus in the guide camera.
The problem is the stars in the guider are very oval, and I can't get them into sharp focus. Did a bit of a google search, and found some stuff about field curvature becoming a problem the further away the guide chip is from the pick off prism.
Any thought on correcting this, or is it just one of those things you have to live with???
Not to sure how it's effecting guiding because it's been blowing like mad outside, and the corrections being made in Maxim are quite large, but a 60 second exposure produces pretty round stars still.
Erik.
The problem is the stars in the guider are very oval, and I can't get them into sharp focus. Did a bit of a google search, and found some stuff about field curvature becoming a problem the further away the guide chip is from the pick off prism.
Any thought on correcting this, or is it just one of those things you have to live with???
Not to sure how it's effecting guiding because it's been blowing like mad outside, and the corrections being made in Maxim are quite large, but a 60 second exposure produces pretty round stars still.
Erik.