Lens Advice - Canon 70-200L+2x, Canon 100-400L or Sigma 150-500

Started Jan 15, 2013 | Discussions thread
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plautoq
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Lens Advice - Canon 70-200L+2x, Canon 100-400L or Sigma 150-500
Jan 15, 2013

Dear DExperts...

I currently own a 70-200L+2x extender, and I think the images are soft on the 400mm / ISO 6400 (yes, pushing things to the limit but lights at the gyms are very poor). Canon 5D MK III is making a difference.

My question is : is the Canon 100-400L or Sigma 150-500 much better than the 70-200L+2x at the 400mm end ? Here are some samples from the 70-200L+2x as reference. Please share your photos if all possible on the same limits.

Maybe this is as good as it gets. But thanks in advance for any experiences you can share.

Cheers.

 plautoq's gear list:plautoq's gear list
Canon EOS 60D Canon EF-S 15-85mm f/3.5-5.6 IS USM Canon EF 24-70mm f/2.8L USM Canon EF 70-200mm f/2.8L USM Adobe Photoshop Lightroom 4
Canon EOS 5D
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