Field flattener for ED80 and modded canon 300D

[seeker372011 (Narayan)]

would greatly appreciate if anyone could recommend a field flattener that would help fight the field curvature problem I am having with my modded Canon 300D and ED80.preferably one that didnt break the bank, if such a thing were possible

funny thing I never noticed it much with the stock Canon-was there all right just not so pronounced -but the modded Canon comes to focus at the very end of the focuser travel range, I am using a 2 inch UV/IR filter and the field curvature effect is driving me nuts

thanks in advance for any suggestions

Narayan

[[1ponders] (Paul)]

Check out this thread and it's links Narayan

"I'm looking for a refractor field flattener........."

[UniPol]

Try the Yahoo users group which is Orion_ED : Orion ED Telescopes and has the following link :

http://tech.groups.yahoo.com/group/Orion_ED/

Just about anything and everything is discussed about the Orion ED's and clones on this site.

Cheers,

Steve

[EzyStyles (Eric)]

hi narayan, can you post a pic? thanks

[janoskiss (Steve H)]

Bert (avandonk) is the ED80 field flattening master. maybe worth sending him a pm.

[seeker372011 (Narayan)]

Originally Posted by EzyStyles

hi narayan, can you post a pic? thanks

Here Eric

http://www.flickr.com/photo_zoom.gne...1505694&size=l

warn you, its not pretty..though to be fair some of the problem in this particular image is due to (i think) sensor not being square to the optical plane..

Narayan

[seeker372011 (Narayan)]

Originally Posted by janoskiss

Bert (avandonk) is the ED80 field flattening master. maybe worth sending him a pm.

PM sent!
narayan

[EzyStyles (Eric)]

interesting... that looks like collimation to me on the ED80. that pic has great potential . keep at it