As far as I can tell neither the A 1.4 or 2X L converters will work
safely on either A* or M* 300 f4 lenses.
Since a picture is worth a thousand words here are the relevant pages
from Boz's site:
http://www.bdimitrov.de/kmp/teleconverters/A2X-L.html
http://www.bdimitrov.de/kmp/teleconverters/A1.4X-L.html
and my Photo of the rear view of the M*300 f4.0. The A* is exactly the
same.
http://www.mindspring.com/~pjalling/SMCP_M(Star)300mm_f4.0_Rear.jpg
The rear element of these 300's sits just about at the same plane as the
lens mount.
Fred wrote:
Interesting, since I don't think the protruding elements will allow you
to mount the L converter on a A*300 f4.0, (or on the M*300 for that
matter).
That is correct. I However, I've found that the A 2X-L and the T6-2X both
work well on the Pentax M*/A* 300/4 twins.
Fred
--
When you're worried or in doubt,
Run in circles, (scream and shout).
