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Old May 25, 2015, 12:26 PM   #1
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Default Canon 100-400mm ii or Sigma 150-600mm (c or s) for birding/dragonflies

I'm looking at getting the Canon 100-400mm ii or Sigma 150-600mm (c or s) for my 70D shooting birding/dragonflies. After hunting the internet for answers, I'm still not certain which would produce the best photos for my usage.

Excluding factors of minimum focus and lens weight, would it be better to use the Canon lens at 400mm and crop or to use one of the Sigmas at 600mm and not crop? Or would the differences (all other things equal) be not very detectable?

Thanks in advance!
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Old May 25, 2015, 2:02 PM   #2
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I don't know about you, but in my experience, capturing dragonflies with a very long lens (>~200 mm) is tough. I'd also say that BIF is tough with anything longer than ~300 mm. I shoot a lot of soaring raptures in flight, and don't have any trouble with 300 mm, but I think anything moving faster with something longer would be tough. So I'd say that the 150-600 would only be useful if you'll be looking for them roosting or perched.
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Old May 26, 2015, 4:03 AM   #3
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Probably not in your budget, but I would highly recommend another option:
Sigma 120-300 f/2.8 by itself or with the 1.4x or 2x teleconverters.

It get you both world: fast bokeh with 300mm at f/2.8, and 600mm at f/5.6...
See my postings in both the people and wildlife threads using this lens in both Canon and Nikon mounts
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Old Jun 21, 2015, 4:39 PM   #4
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I would look at the YouTube video from Tony Northrop he actually tests the canon sigma and tamron lens for birding
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Old Jun 22, 2015, 12:50 AM   #5
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Here's the video Wave01 is talking about. https://youtu.be/lgurGidoSJs
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Old Oct 25, 2015, 1:27 PM   #6
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I have the 70D and 100-400 L IS ll and it works great for birding. I had the Tamron 150-600 and sold it to get the 100-400. Definitely a better lens in every way.
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Old Oct 27, 2015, 7:47 AM   #7
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I have the Sigma 120-300mm f/2.8 (Nikon mount) and the Canon 100-400mm (old version). The Canon 100-400mm is a beautiful zoom, fast AF, very sharp and deliver a beautiful bokeh. The Sigma is a great lens specially with the 2.0 and 1.4 TC's but for me is very hard to hand hold it, it is a lens to use with a monopod or tripod.
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Old Jun 16, 2016, 5:42 AM   #8
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Great comparison here:
http://blog.sigmaphoto.com/2015/sigm...hrowdown-part/
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Old Aug 23, 2016, 12:52 PM   #9
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I have both the Tamron 150-600 mm and the Canon 100-400 mm II. I have the Tamron for about year and a half. It is a sharp lens and good valve for the money but the focusing is slow comparing to the Canon 100-400 mm II. The Canon lens is better built and very sharp and has a close focus distance of 3 feet. Its focus speed is very fast especially on a 7D MKII and can work with either a Canon 1.4 X TC or a Sigma TC-1401 1.4X TC.

Currently, I have a 70D body and find it struggles a lot with the Tamron lens. I don't know it is me or what. I hate this camera because of the small buffer, it fills up and comes to a stop after 5 frames shooting mRAW.

If you don't plan to upgrade the 70D, I recommend the Sigma 150-600 mm C. The price difference is not much to the Tamron but you cam update the firmware on the lens through a USB dock. And you can use the TC-1401 1.4X TC on this lens.

If money is no objective, I really think that the Canon 100-400 mm II is a much better lens but it costs twice as much. I had a hand-on experience using it on my friend's 7D MKII body with this lens plus the Sigma 1.4 X TC. I like it so much, I just ordered a 7D MKII body from Adorama.

Good luck to you and hope that you will find what you need!
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