Help me choose Sigma 15-500 or Sigma 70-200 OS + 2x Ext

Started Feb 10, 2013 | Questions thread
rsn48 Veteran Member • Posts: 7,680
Avoid the 2 TC

The most effective TC's are the 1.4's, almost all 2 TC's aren't that good, they soften the image too much. Both lenses you are considering are excellent lenses, but don't go beyound 1.4 TC. So if 70 - 200mm isn't doing it for you with a 1.4 TC, your decision is made.

By the way, I've been using SLR's and DSLR's since 1973 and like you I bought 2 TC's, nope they don't work, not really.  I even have a Tamron 2 TC that a buddy bought and didn't like and gave it to me.  About the only thing I use it for is to shoot moon pics.

I think if you are looking for quality long, the suggestion of the 50 - 500 OS Sigma is a good one.  Realize on a crop camera its longer than 500mm.

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