Steve Spencer Offline Upload & Sell: On
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carstenw wrote:
Zeiss may have produced a lemon, sure, but I have not heard of one yet. Sigma has produced a whole string of them, and are still working hard to shake off that reputation.
And about the snobbery, no, not in this case. The Sigma 35/1.4 is documented by several well-known bloggers as having quality issues. Tim Ashley tried four times to get a good copy and just gave up, IIRC. So yes, fantastic lens if you can get a good copy, but that is a big if.
So while I agree in general that Zeiss lenses are not perfect and Sigma lenses are worth a look, I don't think there is any snobbery here, just a realistic opinion, which you don't share....Show more →
In my view it is very hard to judge quality control and to do it well I think you need to have a lot of lenses to test. Roger at Lens rentals seems to be able to do this at least in a modest way sometimes, because he has lots of copies of lenses. I don't think he has done these types of tests with the Sigma 35 f/1.4 yet, however, so from my perspective the data just isn't there on quality control. As to the blogger who tried four times and got four bad copies I am not persuaded by this anecdote. Even if 20% of the lenses made by Sigma were defective (which seems like a very high estimate) and you picked four lenses one at at time randomly and tested all four of them sequentially less than 2 times in a thousand would you get four bad lenses. It seems to me that it is much more likely that the problem was with his camera or with something else in his testing methodology. So many bad copies in a row starts to be quite implausible.
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