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View Full Version here: : Field flattener for ED80 and modded canon 300D


seeker372011
14-03-2007, 04:37 PM
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:mad2:

thanks in advance for any suggestions

Narayan

[1ponders]
14-03-2007, 04:55 PM
Check out this thread and it's links Narayan

"I'm looking for a refractor field flattener........." (http://www.iceinspace.com.au/forum/showthread.php?t=12799)

UniPol
14-03-2007, 07:21 PM
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
15-03-2007, 02:26 AM
hi narayan, can you post a pic? thanks

janoskiss
15-03-2007, 10:04 AM
Bert (avandonk) is the ED80 field flattening master. maybe worth sending him a pm.

seeker372011
15-03-2007, 10:12 AM
Here Eric

http://www.flickr.com/photo_zoom.gne?id=421505694&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
15-03-2007, 10:14 AM
PM sent!
narayan

EzyStyles
15-03-2007, 06:11 PM
interesting... that looks like collimation to me on the ED80. that pic has great potential . keep at it :thumbsup: