<<Doesn't matter. This is not a useful C-U for the lenses available for your
µ4/3 or practical for your FF gear. It was designed for a 500mm lens with
limited close focus. As I pointed out, the 0.76 diopter <<T132 crosses over
with the primary lens close focus with the µ4/3 100-400mm lenses; closest focus
sans C-U is the same as longest focus with it. Before I fully understood this,
I did buy a Pentax <<T226, 0.4 diopter, but I actually have no need for it.
I don't buy this totally. With the low power diopter there is still MORE MAG
possible at closest focus and on a zoom can use a potentially sharper shorter
FL at closer focus and thus theoretically obtain a sharper image. It is
difficult to believe that adding a achromatic doublet in front of the front
element could actually result in more resolution, but seems it might be true
for the T132 (stopped down some at least). This conjecture has not been
thoroughly experimentally verified, so caution is warranted.
Might be worth checking if the T226 is good for larger flutterbys.
More mag at closest focus is still more mag even if some overlap, 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/
|