Unfortunately the only macro adapter I have is a
Soligor 'Auto Macro Adapter.' The lens needs to be
set to infinity and the focussing is done with the
adapter. The result is very good indeed. But I
doubt that it would be much better than I used to
get with a standard Pentax 50/1.7 SMC M lens on
the end. The optics in the Soligor device would
determine the quality of the final result. It
looks very good to me. I put the camera on a stand
and took a few pictures (RAW) of stuff on my desk
and the images are sharp as a needle. Without the
adapter the images are very much smaller -- how
much I have yet to determine.
Don W
Powell Hargrave wrote:
What was your thinking behind using the converter?
More working distance?
More working distance and twice the magnification possible.
Just giving it a try to see how it would work and it works very well except
for the incorrect f stop numbers.
This is a superb lens and
I've said so on several occasions, but there has
been no response.
I agree. The Sigma 50mm EX Macro is a very sharp lens that looks good and
works very nicely.
I presumed this was because
there are not many of us using them. The Pentax
100mm seems to be far more popular although not as
good overall -- according to the tests I've seen.
Don
Powell Hargrave wrote:
http://members.shaw.ca/hargravep/Image10.htm
Sigma 50mm EX Macro plus the Pentax Rear Converter-A 2X-S.
Comments, critique encouraged.
The f stop reported to the camera is wrong with this combo. Wide open it
tells me the 2.8 lens is a 1.4 and of course the combination is really 5.6.
The exposure is fine and when set to A the camera adjusts the diaphragm
properly. Just the numbers are wrong. Anyone know if this can be fixed?
Bit of an annoyance but not a real problem.
--
Dr E D F Williams
_______________________________
http://personal.inet.fi/cool/don.williams
http://www.kolumbus.fi/mimosa/index.htm
See feature: The Cement Company from Hell
Updated: Print Gallery -- 16 11 2005
