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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 30 Jun 2011 (Thursday) 01:49
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24-105 a little slow to focus in low light?

 
LucidPhoto70
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Jun 30, 2011 01:49 |  #1

I went from the 7D kit lens 28-135mm to the 24-105mm f4. I'm noticing that I'm having trouble with AF in low lightning that my 28-135 could handle with no sweat. Either it takes a long time or doesn't focus at all and I have to move around until I get enough light in the shot to AF lock. Is this normal?


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ceriltheblade
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Jun 30, 2011 04:35 |  #2

i don't have the 28-135 (and never had), but on the 7d, my 24-105 focuses quite quickly (my fastest focuser) quiet and mostly accurate. i haven't had any problems with it in particular in low light - but i have noticed that it is more responsive in good light circumstances.


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Accessoire
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Jun 30, 2011 08:14 |  #3

with a maximum aperture of f4, you're only going to be able to do so much in low light without a flash.
its a great lens, but Id think its better as a walk around lens as opposed to a lens for low light conditions.
have you tried raising the ISO?




  
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bpark42
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Jun 30, 2011 11:41 |  #4

Accessoire wrote in post #12682077 (external link)
with a maximum aperture of f4, you're only going to be able to do so much in low light without a flash.
its a great lens, but Id think its better as a walk around lens as opposed to a lens for low light conditions.
have you tried raising the ISO?

How is raising the ISO going to help autofocus performance?




  
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Accessoire
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Jun 30, 2011 11:48 |  #5

I suppose it doesn't...just grasping for some overall better low light performance options.




  
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reprazent
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Jun 30, 2011 12:26 |  #6

I doubt that your 28-135 would have achieved focus faster in the same situation..


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LucidPhoto70
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Jun 30, 2011 15:45 |  #7

Let me see if I can do a 24-105 vs. 28-135 low light comparison on the tripod this evening. Last night I was just handholding on the couch playing with the lens just like I've done with the 28-135 all the time when I noticed the issue.


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sandpiper
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Jun 30, 2011 15:55 as a reply to  @ LucidPhoto70's post |  #8

I had a 28-135 and replaced it with the 24-105L. The L outperforms the 28-135 in every respect, including AF speed and accuracy in low light.




  
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yourdoinitwrong
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Jun 30, 2011 16:38 |  #9

sandpiper wrote in post #12684651 (external link)
I had a 28-135 and replaced it with the 24-105L. The L outperforms the 28-135 in every respect, including AF speed and accuracy in low light.

My experience is the same. 24-105 far outperformed the 28-135.


5D4 w/BG-E20, 24-105 f/4L, 70-200 f/2.8L IS II, 35 f/1.4L, 85 f/1.8, 100 f/2.8L IS Macro, Sigma 50 f/1.4
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GregoryF
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Jun 30, 2011 17:21 |  #10

yourdoinitwrong wrote in post #12684830 (external link)
My experience is the same. 24-105 far outperformed the 28-135.

Same experience here. May be something wrong with the OP's lens.


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thestone11
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Jun 30, 2011 17:47 |  #11

Put a flash on will be the best way to deal with that.

That is why the 24-70mm comes in handy in situation like that....lol


Canon 5D MK II | Fuji X100 | Canon T2i | Canon 100mm macro f/2.8 | Canon 135L f/2 | Canon 50mm f/1.2 L | 17-40mm f/4 L | 24-70mm f/2.8 L | 70-200mm f/4 L IS USM |Canon 430EX II Flash X2 | Pocketwizard TT5 & TT1

  
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GregoryF
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Jun 30, 2011 17:56 |  #12

thestone11 wrote in post #12685151 (external link)
Put a flash on will be the best way to deal with that.

That is why the 24-70mm comes in handy in situation like that....lol

Lack of flash does not seem to be the problem. the 24-105 should focus easier than the 28-135 everytime. Mine has no problem locking on in extremely poor light.


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Kospan
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Jun 30, 2011 19:02 |  #13

GregoryF wrote in post #12685185 (external link)
Lack of flash does not seem to be the problem. the 24-105 should focus easier than the 28-135 everytime. Mine has no problem locking on in extremely poor light.

Although I expected that this lens would struggle, my copy also has no problem locking on in extremely low light. Maybe the OP should send his copy in for inspection.


Canon 5D MKII - 7D, Canon 24-105 L - 70-200 IS II L, Sigma 50 1.4 - 85 1.4, Canon 2X II Extender, Speedlite 430EXII, Vanguard Alta+ 264AT & PH32, Vanguard Uprise 48, Lowepro Classified 160 AW, B+W Filters
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LucidPhoto70
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Jun 30, 2011 21:17 |  #14

Hi everyone, I just completed 45 minutes of testing on a tripod in low light using objects of various colors and contrast. The 7D was in manual mode so all the settings were the same. I also tried to keep the zoom level the same on both lenses.

What I found was both lenses performed about the same in low light as far as the AF focus went but the 24-105 did indeed perform slightly better and was able to lock on a handful of shots when the 28-135 could not. I have no idea why the other night I had such issues getting it to lock. Granted I wasn't comparing the lenses head to head at the time. It must have just "felt" slower to me. Anyhow, thank you all for the input. I'm happy to say my lens is peforming well. :)


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fiebru1119
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Jul 01, 2011 00:11 |  #15

It was my understanding that it is the BODY that is responsible for whether or not you get a lock in low light (if one at all) and how quickly the lens focuses... True that at f/4 you are restricting the camera's focusing ability, but by that token any lense slower than f/2.8 should perform the same on the same body all things being equal. I could be wrong though.


A7RIII | EF15/2.8 FE | 16-35/4.0LIS | 24/1.4L II | ZA55/1.8 | 24-105G OSS

  
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