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Canon 70-200 f/4 L IS with 1.4x or Canon 70-300 f/4-5.6 L IS or 300 f/4 L IS over Tamron 70-300 VC?

Started Feb 19, 2015 | Questions thread
OP dheerc New Member • Posts: 17
Re: test pics from all three:

bronxbombers4 wrote:

All tests done at about 25' to target, longest end, f/5.6, center frame, constant indoor lighting, best of numerous liveview manual 10x focusing attempts, tripod, remote release, 100% crops:

Here is the 70-200 f/4 IS + 1.4x TC III:

http://sunsetbayphotography4.zenfolio.com/img/s2/v61/p1143966064.jpg

And here is the 70-300L:

http://sunsetbayphotography4.zenfolio.com/img/s1/v56/p1143966196.jpg

And here the tamron:

http://sunsetbayphotography4.zenfolio.com/img/s2/v58/p1143966326.jpg

different target 200% crops:

70-200+tc:

http://sunsetbayphotography4.zenfolio.com/img/s4/v66/p1143967304.jpg

70-300:

http://sunsetbayphotography4.zenfolio.com/img/s2/v61/p1143968368.jpg

tamron:

http://sunsetbayphotography4.zenfolio.com/img/s1/v56/p1143967168.jpg

WOW! This is one of the best tests I've seen so far with respect to these three lenses! Thanks a ton! You completely got me on the 70-300L side now!
Out of curiosity, how come the Tamron seems to be only a tad different than the 70-300L and almost the same as the 70-200 with TC? I am very surprised with that! Does that mean on a FF camera, it does better and comes close to the L lenses because on my cropped T3 sensor, the difference is substantial!

 dheerc's gear list:dheerc's gear list
Canon EOS 1100D Canon EOS 6D Canon EF 50mm F1.8 II Canon EF 70-300mm f/4-5.6L IS USM Canon EF-S 18-55mm f/3.5-5.6 IS II +4 more
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