[Top] [All Lists]

Re: [OM] OM-1 and 100-400 mm lenses

Subject: Re: [OM] OM-1 and 100-400 mm lenses
From: MICHAEL GORDON via olympus <olympus@xxxxxxxxxxxxxxxxx>
Date: Fri, 8 Jul 2022 22:07:31 -0400
Cc: MICHAEL GORDON <usher99@xxxxxxx>
Thanks for looking, Joel.  I see what you mean.  It seems a petal or two should 
be close enough to the focal plane to be rendered more sharply. I would 
postulate it is in part related to a more abrupt loss of sharpness away from 
the center from the CU diopter.  The lens itself has minimal field curvature.   
Perhaps a small stack may still have helped some for some of the petals on the 
left.  I had the focus step on the focus bracket on “3” (a mistake) and back to 
“1” for macro would be a menu dive— we were hiking.   
One can get a clue if the optics of the lens and CU diopter might work well 
together by investigating the FL of the lens for which it was designed, but it 
must be empirically determined if the marriage is suitable. 

Ask MTM  (Moose the matchmaker), Mike
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/

<Prev in Thread] Current Thread [Next in Thread>
Sponsored by Tako
Impressum | Datenschutz