I have an ES ed80 triplet refractor paired with 533mc pro + oag. I'm getting egg shaped stars at the edges on the top half of my image.
Is this a symptom of no flattener?
I have been trying to work out what type of flattener I can use that won't cost me half the price I paid for the scope. Bintel said they have nothing for me and I was wondering if anybody else tried one with any success? I would actually prefer a reducer/flattener to widen my FOV to compensate for the small sesnor ony camera.
This one appears to be ok, but I'm not sure.
https://proastroz.com/products/found...57ddfda3&_ss=r
Thank you