[Logieberra (Logan)]

Ok, so the plot thickens...

I just so happened to come across a google post of a UK astronomer (Brian) that uses his ED80 successfully with the AFR4 flattener: http://myweb.tiscali.co.uk/boatman or http://donastro.blogspot.com

This is now the 2nd person that I know of who can get his combo to work. Troy from this site is another.

Brian mentioned something very interesting, which may account for the STRANGE images that I get from this thing – at all settings on the flattener. Turns our that there are multiple versions. I wish that William Optics had product numbers / codes L

I assume mine is one of the originals, it was recalled after I'd had it for a week, because they fitted one of the elements back to front, they said. I didn't actually send mine back but waited for the new ones to be available and my supplier, sent a new one to me to try out. I did and preferred the old so I returned the new one to him.
The new one actually gave me more coma, was physically about 3" longer, and had a 1.15x factor that the supplier didn't tell the supplier about. He told me later that the new one was replaced by a new, new one of 0.8x, and I assume this is the version you have.

Please check out my pic again, and let me know if it’s probably the “element back the front” deal…

Cheers,

Logan.