My stars are streaking at the edge of my images. I am using a Celestron C8 with a 6.3 focal reducer, mounted on EQ6 mount on permenant peir.
I have re aligned my scope 3 times (Test result: able to keep star within centre of cross hairs of illuminated reticle for over 10 minutes).
What is going wrong?
How do i get a flat field out to the edge
Here are close ups of streatched stars that only appear in corners. I am shooting thru a Celestron C8 with a 6.3 reducer. this is attached to an off axis guider then attached to my camera.
My polar alignment tests seem to indicate that i am polar aligned. 10 min test star remained in centre of illuminated reticle.
Each image has the same problem that manifests itself when stacked.
Popping in to Bintel in melbourne on Saturday to see what they have to say.
A member of our club suggested additional spacer rings that may bring the field flattener to its optimum point.