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Tamron 150-600 G2 and Canon 100-400 II
  
 
Jeff Nolten
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p.2 #1 · p.2 #1 · Tamron 150-600 G2 and Canon 100-400 II


The 60D (and 70D) cannot AF at f8 so using a 1.4x on any lens slower than f4 is a no-go for AF. This is for viewfinder AF, live view AF does not have an f8 limit and still works, especially on the dual-pixel AF of the 70D.

dalite wrote:
The OP is talking about the 100-400 II.


Fuller explanation: The 1D#s and then 5D3 were the first bodies to AF at f8. On the 1DX and 5D3 f8 AF was limited to the center point only. With the 1DX2, 5D4 and 80D this is still generally true with the special exception of using the 1.4x3 with the 100-400 II and 200-400 which allow AF with additional focus points in the central cluster of AF points.

For purposes of this thread, the 80D is the first ##D camera to provide f8 AF. I don't know about other recent cameras like the 77D since I haven't looked at their specs. The Tamron and Sigma 150-600s are f6.3 at their long end - technically too slow for AF on earlier bodies (speced to AF at f5.6 and faster) - but get away with it on bodies like the 60D.



Sep 11, 2017 at 03:08 PM
hokiejokey
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p.2 #2 · p.2 #2 · Tamron 150-600 G2 and Canon 100-400 II


Jeff Nolten wrote:
For purposes of this thread, the 80D is the first ##D camera to provide f8 AF. I don't know about other recent cameras like the 77D since I haven't looked at their specs. The Tamron and Sigma 150-600s are f6.3 at their long end - technically too slow for AF on earlier bodies (speced to AF at f5.6 and faster) - but get away with it on bodies like the 60D.


My 7dii will autofocus at F/8 (100-400ii, 1.4iii). Center point cross type and four adjacent points non-cross type.

As to the 70d, before I bought the 7dii I owned a 70d and rented both the 100-400ii and Sigma 150-600 sport (the heavier "higher quality" version that I believe the Tamron G2 was build to compete with).

I found the Sigma to be way to heavy to walk around with compared to the 100-400ii. The Sigma was sharp at 200--400, but if you were buying it in hopes of getting that kind of sharpness at 600 I don't think you would be too happy. I understand the Tamron and Sigma are different lenses, but just something to be aware of.

Attached is a photo with my 70d and the 100-400ii. It was one of the first shots I took, just a mosquito sitting on a rope. Jaw dropping sharpness, IMHO.






  Canon EOS 70D    EF100-400mm f/4.5-5.6L IS II USM lens    330mm    f/6.3    1/800s    100 ISO    0.0 EV  




Sep 11, 2017 at 08:37 PM
Jeff Nolten
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p.2 #3 · p.2 #3 · Tamron 150-600 G2 and Canon 100-400 II


Oh, sorry I forgot the 7D2 which predates the 80D in f8 AF. It behaves like the 5D3, single point f8 (with assist points) AF only. The 80D does not have assist points, this can all get very confusing if you try to list all the distinctions.


Sep 11, 2017 at 09:36 PM
arbitrage
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p.2 #4 · p.2 #4 · Tamron 150-600 G2 and Canon 100-400 II


Jeff Nolten wrote:
The 60D (and 70D) cannot AF at f8 so using a 1.4x on any lens slower than f4 is a no-go for AF. This is for viewfinder AF, live view AF does not have an f8 limit and still works, especially on the dual-pixel AF of the 70D.

Fuller explanation: The 1D#s and then 5D3 were the first bodies to AF at f8. On the 1DX and 5D3 f8 AF was limited to the center point only. With the 1DX2, 5D4 and 80D this is still generally true with the special exception of using the 1.4x3 with the 100-400 II
...Show more

Just one small clarification (or maybe I'm reading it wrong) but the 5D4 and 1DX2 don't have the limited lens combos like 80D and 6D2 do for f/8 AF. Basically if you are using a Mk III TC to get to f/8 you get all 61 points with any lens/TC combo. Older TCs limit the functionality. There is a overly complicated list in their respective manuals.



Sep 11, 2017 at 10:16 PM
 

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Pixel Perfect
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p.2 #5 · p.2 #5 · Tamron 150-600 G2 and Canon 100-400 II


hokiejokey wrote:
My 7dii will autofocus at F/8 (100-400ii, 1.4iii). Center point cross type and four adjacent points non-cross type.

As to the 70d, before I bought the 7dii I owned a 70d and rented both the 100-400ii and Sigma 150-600 sport (the heavier "higher quality" version that I believe the Tamron G2 was build to compete with).

I found the Sigma to be way to heavy to walk around with compared to the 100-400ii. The Sigma was sharp at 200--400, but if you were buying it in hopes of getting that kind of sharpness at 600 I don't think you would be too
...Show more

Blanket statement about the sharpness of the SIgma which isn't true. I have no issues with mine @600mm. It's very sharp all the way to about 550mm and sharp @ 600mm even wide open.

Also that mosquito is actually a giant robber fly, some species can get to 2" long and they can take down dragon flies on the wing. Thank god they don't get a lot bigger for our sake.



Sep 12, 2017 at 02:55 AM
diverhank
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p.2 #6 · p.2 #6 · Tamron 150-600 G2 and Canon 100-400 II


Wildbruce wrote:
Thank you everyone for your feedback on the Canon 100-400 II and the Tamron 150-600 G2 lenses. I guess I'll go with the Canon since it seems to focus faster.


I have both the Tamron version 1 and the Canon 100-400 II and I can't tell the difference in focusing speed. They are about the same...at least both are plenty fast for BIF. I must have had a very sharp Tamron version...with the 1.4x version II (I don't have III) , I can't really tell if it's any better than the Tamron version 1. Actually most of the time, it seems to be worse. Without the 1.4, the 100-400 II is really sharp, YMMV. For this reason I'm using both...the 100-400 shines if you don't need the extra reach.



Sep 12, 2017 at 03:10 AM
mommacobb
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p.2 #7 · p.2 #7 · Tamron 150-600 G2 and Canon 100-400 II


Thanks for the replys! I appreciate all help.


Sep 12, 2017 at 01:20 PM
technic
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p.2 #8 · p.2 #8 · Tamron 150-600 G2 and Canon 100-400 II


Pixel Perfect wrote:
Also that mosquito is actually a giant robber fly, some species can get to 2" long and they can take down dragon flies on the wing. Thank god they don't get a lot bigger for our sake.


One time I spotted a damselfly with very erratic flight; when it landed I understood why ;-)




Sep 12, 2017 at 01:44 PM
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