canon lens

[paulbrogden10]

Hello

I am trying to decide weather to sell the 100-400 mk2 then get the sigma sport 150-600 i use 600d and 7d the 100-400 with 1.4x will not auto focus any advice? I watch a guy on you tube who hand holds the sigma 150-600 sport . are you sure its heavy.

https://www.youtube.com/watch?v=EkAat75_QGI

[Waddizzle]

What would be your reasoning for changing from the Canon to the Sigma?  Ability to Auto Focus with the 1.4x?  I would not expect the Sigma to auto focus any better with the extender than the Canon, due to their f/stops.

[jrhoffman75]

Both the 600D and 7D require a lens of f/5.6 or faster for autofocus. Thus if you want to add a 1.4x extender you need to start with a lens of f/4 or faster.

The Sigma is f/5-6.3, so it would autofocus in the short end, but would not autofocus at the high end.

Looks like before the lens gets to 400mm it falls below f/5.6.

Thus there would seem to be no advantage compared to the 100-400 w/1.4X. And the Canon Mk II lens is a fantastic lens.

[TTMartin]

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@jrhoffman75 wrote:

The Sigma is f/5-6.3, so it would autofocus in the short end, but would not autofocus at the high end.

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Sigma lenses will AF at their long end on Canon EOS cameras despite the f/6.3 apperture.

[Waddizzle]

"Yes the Sigma 150-600 Sport is really that heavy. It weighs almost twice as much as the EF 100-400 L IS II (6.3 lbs vs 3.5 lbs). Of course you can handhold it, but, I can tell you from experience it is a pain to carry that heavy of a lens around." 

I have been weighing the pros and cons between those two lenses.  I'm not the robust fellow that I used to be.  I have been leaning more and more towards the Canon.

"Sigma lenses will AF at their long end on Canon EOS cameras despite the f/6.3 apperture." 

I think he may have been referring to using the 1.4x extender with the lens.

[cicopo]

Why do you think you need the Sport vs the Contempory? What are your intended uses? AND I agree that a 7D2 may be a more cost effective upgrade. That said a 7D2 & 150-600 C is not that far off what just the Sport might cost.

[TTMartin]

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@paulbrogden10 wrote:

Hello

I am trying to decide weather to sell the 100-400 mk2 then get the sigma sport 150-600 i use 600d and 7d the 100-400 with 1.4x will not auto focus any advice? I watch a guy on you tube who hand holds the sigma 150-600 sport . are you sure its heavy.

https://www.youtube.com/watch?v=EkAat75_QGI

---

The 7D Mk II will autofocus with the EF 100-400 L IS II and a 1.4X TC.

Yes the Sigma 150-600 Sport is really that heavy. It weighs almost twice as much as the EF 100-400 L IS II (6.3 lbs vs 3.5 lbs). Of course you can handhold it, but, I can tell you from experience it is a pain to carry that heavy of a lens around.

[Waddizzle]

"The 7D Mk II will autofocus with the EF 100-400 L IS II and a 1.4X TC." 

I think you can add the 5D Mk III, and all of the 1D series to that list of camera bodies that would work.

[TTMartin]

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@Waddizzle wrote:

"The 7D Mk II will autofocus with the EF 100-400 L IS II and a 1.4X TC." 

I think you can add the 5D Mk III, and all of the 1D series to that list of camera bodies that would work.

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I agree, I was trying to hint that it might be worth upgrading his camera to the 7D Mk II in this case rather than looking at a different lens. Going from a 7D to a 7D Mk II is a bigger jump in overall performance that most people realize. Another option would be the 80D which will AF with the EF 100-400 L IS II and a 1.4X TC III with 27 of it's 45 AF points not just the center one.

http://www.learn.usa.canon.com/resources/articles/2016/eos-80D/af_at_f8.shtml

[Waddizzle]

"Another option would be the 80D which will AF with the EF 100-400 L IS II and a 1.4X TC III with 27 of it's 45 AF points not just the center one." 

Yeah, I read that and have been experimenting with shooting more AF points than just the center.  It doesn't work when you're trying to pick out a bird hidden in the branches, and there a lot of branches between you and the bird.  Only the center AF point pulls that one off.

You guys have me looking up into the trees now.