Quote:
Originally Posted by Markulous
Yeah, think the Sigma suffers from the same problems as the Canon, namely that the lens assembly protrudes from the TC and so can foul certain lenses.
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On the Stigma 50-500mm F4-6.3 you have a switch to lock it 100mm before fitting the converter to stop it going below that. It works a treat with the 1.4 converter fitted but it's manual focus only even on a pro camera. As Cathus says, you do need bright sunlight to get the best out of it. It's one of the exceptions I stated above, as most lenses won't work with a converter if they are more than F4, and if they did the results may not be worth the trouble.
