I just got an A*300F2.8 and A2X-L converter.  I have made some very sharp
pictures and some not-so-sharp pictures with the same subject, same aperture
(wide open), and same shutter speed, and same (solid) tripod.  The article
at the link  below helped me out a lot....

http://www.naturephotographers.net/bh0201-1.html

--Mark


--------Kevin wrote---------

I had a similar experience with my A*300/2.8 w/ the 2x-s.  I have since
verified that
I can take sharp pictures with this setup but I don't know what the problem
was.  I
was focussing near minimum distance, near wide open on Supra 400.  My PUG
entry this
month is one of the offending "softies".

My retest was also near minimum distance but with the lens set to f/8 and
the film was
supra 100.

Both the problem roll and the retest were take from a sturdy tripod.

Would the 2x-L do better?  Is this combo known to be soft when wide open?
Anyone know?

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