keller.schaefer wrote:
I think it is not fair to gerealise based on the single known Canon
compatibility problem. ....
My own experience with Sigma -- one, just one, lens, so I will not
generalize for other people -- is with a 28-70 f/2.8-4 that I bought
several years ago. On a Super Program it would report, in program mode,
a much larger f-stop than it actually had. It would report
one-point-something (I don't remember 1.4 or 1.2 or 1.7 now, it was a
while back). So this was an obvious compatibility issue but I used the
lens anyway. The camera could take pictures with this lens in place and
there was no problem at all in manual or aperture-priority mode. Then I
bought a PZ-1 and the lens worked fine on that. My experience with the
Super Program matched that reported on rec.photo.equipment.35mm with
another poster, who likewise had found the same kind of error with a
(different, as I recall) Sigma autofocus lens and a Super Program.
However, my other negative experience with that lens was that one day,
my husband (who had borrowed the lens) started to remove it from his
camera to attach another lens and the Sigma just quietly came apart in
his hands. So, I no longer have a functioning Sigma lens.
I'd rather spend my lens-buying money on a Pentax lens, which I'm
confident will be compatible with both my manual-focus and autofocus
Pentax bodies. Additional incentive (for me) to buy the Pentax is that I
also expect that a Pentax will probably control flare better than the
Sigma did, and I've never had a Pentax lens fall apart at any time, let
alone in normal use.
Summary: I had a Sigma. It was less compatible than a Pentax lens would
have been, and my particular sample had substandard build quality, SO,
I'd rather not buy Sigma, personally.
ERNR
