I have a Canon 500D that I slapped on the 12-24 just to see the look thru the viewfinder. The field of view decreases so essentially, it is cropping the corners by affecting the angle of view at 12mm. Not sure if this would be a positive addition or not. Topside, I do not see any difference in corner sharpness with or without the 500D.
My system does not show up till Tuesday so I guess I will have to test it out when it finally shows.
Edited by tx51210, 20 April 2007 - 06:48 PM.