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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 05 Jan 2012 (Thursday) 09:02
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Which 70-200 have the fastest AF : f4is or f2.8is2 ?

 
cherrymoon
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Jan 05, 2012 09:02 |  #1

Hi,

Serious help is needed here.

I mainly shoot sport and portraits (with FF !). Kind of sports : swimming, cycling and running. Triathlon in fact, so mainly outdoor but when some races continues when the night fall and sometimes in pool where the light is "difficult". Big apertures is usefull for light but because I love thin DOF too.

I had 3 70-200s : the f4, f4IS and f2.8. I loved all the f4s. I only tried to shot races with the f2.8 version. And I found the AF of the 2.8 slow and often miss my focus. Maybe my copy had a problem ? And the f2.8 (got 2) were not as good at 2.8 then f4 were at f4. So I sold the f2.8 and I'm on the point to sell my 135L. But due to € crash I want to reduce my gear and I'm confused between 2 options :
-selling my 135L and get this called "fabulous 70-200 mk2"
-keep the 135L and get a 70-200/4IS

Option 1 is 210€ more expensive, not so much in a way.

Please don't tell me I don't need IS. I have it on 24-105 and absolutely need it !

Now, I'm debating between 70-200/4IS (and keep my excellent 135L) and 70-200/2.8IS2.

According to you, wich one have the fastest AF on 5D2 ?

PS : I never tried to shot a race with the 135L where I think zoom is most usefull


5D² 40 pancake | 50/1.4 | 85L II | 135L | 16-35L IS | 24-105L | 70-200 f2.8 L IS II and a TT bike
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timnosenzo
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Jan 05, 2012 09:16 |  #2

For pure AF speed in good light, I don't think you'll see much of a speed difference between the f/4 and f/2.8. In more challenging lighting conditions, the f/2.8 will likely be able to lock on faster and more accurately.

Here's a comparison I did a while ago, which shows the speed the lenses rack back through the focus range. The camera was pointed at a white wall (so there was nothing to lock on to) and the light was fairly low.

IMO the 135L will beat them both in terms of speed.

70-200 f/4 vs. f/2.8. Click to watch:

IMAGE: http://www.timnosenzophoto.com/photos/870180038_b5XP3-M.jpg
IMAGE LINK: http://www.timnosenzop​hoto.com …hf83#870180038_​b5XP3-A-LB  (external link)

70-200 f/2.8 vs. 135L. Click to watch:
IMAGE: http://www.timnosenzophoto.com/photos/870152270_YN4dk-M.jpg
IMAGE LINK: http://www.timnosenzop​hoto.com …hf83#870152270_​YN4dk-A-LB  (external link)

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plasticmotif
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Jan 05, 2012 09:23 |  #3

I was hoping you'd post those, Tim

Thanks.


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Michael1984
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Jan 05, 2012 09:35 |  #4

I would hope the 135mm would focus faster.. it is 65mm shorter


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timnosenzo
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Jan 05, 2012 09:40 |  #5

plasticmotif wrote in post #13650750 (external link)
I was hoping you'd post those, Tim

Thanks.

no problem!

Michael1984 wrote in post #13650807 (external link)
I would hope the 135mm would focus faster.. it is 65mm shorter

Well, the 85L is shorter still, and a couple stops faster, but it focuses much slower.


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plasticmotif
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Jan 05, 2012 10:02 |  #6

timnosenzo wrote in post #13650834 (external link)
no problem!

Well, the 85L is shorter still, and a couple stops faster, but it focuses much slower.

It's the by wire system. Those huge elements don't move easily!


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cfcRebel
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Jan 05, 2012 10:42 |  #7

cherrymoon wrote in post #13650658 (external link)
Now, I'm debating between 70-200/4IS (and keep my excellent 135L) and 70-200/2.8IS2.

According to you, wich one have the fastest AF on 5D2 ?

PS : I never tried to shot a race with the 135L where I think zoom is most usefull

I currently have a 70-200 f2.8 non-IS and 70-200 f2.8 Mkii (UV and UZ respectively). I can tell the Mkii's AF is noticeable faster than the non-IS. I don't have a Mki to compare with though.


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cool79
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Jan 06, 2012 00:51 |  #8

looks like from the clip, F4 IS And F22.8mkii af is the same.


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FEChariot
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Jan 06, 2012 01:08 as a reply to  @ cool79's post |  #9

Were the videos shot in one shot or servo?


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nonick
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Jan 06, 2012 01:30 |  #10

I had 4L IS (and 2.8L IS) and now 2.8L IS MkII... the 2.8 L IS Mark II focus faster than 4L IS in general and A LOT faster than 4L IS in dim light or backlight situations. If you want to use the lens for tracking, the 2.8 mkII is much more ideal.


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nonick
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Jan 06, 2012 01:32 |  #11

timnosenzo wrote in post #13650728 (external link)
For pure AF speed in good light, I don't think you'll see much of a speed difference between the f/4 and f/2.8. In more challenging lighting conditions, the f/2.8 will likely be able to lock on faster and more accurately.

Here's a comparison I did a while ago, which shows the speed the lenses rack back through the focus range. The camera was pointed at a white wall (so there was nothing to lock on to) and the light was fairly low.

IMO the 135L will beat them both in terms of speed.

70-200 f/4 vs. f/2.8. Click to watch:
QUOTED IMAGE
IMAGE LINK: http://www.timnosenzop​hoto.com …hf83#870180038_​b5XP3-A-LB  (external link)

70-200 f/2.8 vs. 135L. Click to watch:
QUOTED IMAGE
IMAGE LINK: http://www.timnosenzop​hoto.com …hf83#870152270_​YN4dk-A-LB  (external link)

Did you turn off IS on the Mark II when you test?


Gear|Searching for 7DII, Buying 5DIII 35L II, 24-70 2.8L IS

  
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svarley
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Jan 06, 2012 01:58 |  #12

cherry - You do realize it's harder to get focus at f2.8 right? You have less DOF to miss with. Compare them both at f4 if you want to really get a feel for which one works better.




  
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timnosenzo
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Jan 06, 2012 06:33 as a reply to  @ svarley's post |  #13

FEChariot wrote in post #13655525 (external link)
Were the videos shot in one shot or servo?

One shot

nonick wrote in post #13655587 (external link)
Did you turn off IS on the Mark II when you test?

I don't remember, but I can't say I notice a difference in AF speed with the IS on or off.


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StructuredAmazing
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Jan 06, 2012 11:47 |  #14

timnosenzo wrote in post #13650728 (external link)
For pure AF speed in good light, I don't think you'll see much of a speed difference between the f/4 and f/2.8. In more challenging lighting conditions, the f/2.8 will likely be able to lock on faster and more accurately.

Here's a comparison I did a while ago, which shows the speed the lenses rack back through the focus range. The camera was pointed at a white wall (so there was nothing to lock on to) and the light was fairly low.

IMO the 135L will beat them both in terms of speed.

70-200 f/4 vs. f/2.8. Click to watch:
QUOTED IMAGE
IMAGE LINK: http://www.timnosenzop​hoto.com …hf83#870180038_​b5XP3-A-LB  (external link)
IMAGE NOT FOUND
HTTP response: NOT FOUND | MIME changed to 'text/html' | Content warning: script


70-200 f/2.8 vs. 135L. Click to watch:
QUOTED IMAGE
IMAGE LINK: http://www.timnosenzop​hoto.com …hf83#870152270_​YN4dk-A-LB  (external link)

Hm pretty interesting tests.
These things make me obsess over gear -.-'
lol, is it worth getting the 135L because I'd rather have IS on a telephoto.


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Biological ­ Contagion
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Jan 06, 2012 13:58 |  #15

StructuredAmazing wrote in post #13657538 (external link)
Hm pretty interesting tests.
These things make me obsess over gear -.-'
lol, is it worth getting the 135L because I'd rather have IS on a telephoto.

I had the 70-200 f/2.8L non-IS, and with a lens that size / weight I'd prefer IS. I have also used the 135L and it is perfect as is, light enough and the focal length is such that IS isn't needed IMO.


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Which 70-200 have the fastest AF : f4is or f2.8is2 ?
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