Wanting to buy a 1.4 or 2x TC for my 70-200 F4. I put a WTB on the site, and after talking to several people, think that I want to go with a Kenko brand. One of our members has a Sigma 1.4 and 2x for sale if I am interested.
I don't know anything about the sigma brand. I like their lenses, but what about quality TC matched to my 70-200? Good/bad/indifferent? Many people have given me advice on the Kenko and the Canon, but have not heard anything about the Sigma's.
Thanks to all.