|
The blue halos are CA, however, being on the outside edge of the frame, its not due to an optical error, its due to the field not being flat, hence, those stars are slightly out of focus..
More often than not, a decent refractor with a field flattener will not show this problem.
You could, as robin said, use the refractor for guiding, and use your newt for imaging...
Yep. A white background on the LCD + a white t-shirt over the scope should work fine for flats..
|