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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 11 Jul 2012 (Wednesday) 00:04
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do you trust autofocus 100% ??

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Joined Jul 2005
Jul 11, 2012 00:04 |  #1

do you trust autofocus 100% ??

sometimes you have to use autofocus , but do you trust autofocus 100% ?

you may lose your great moments if you you use autofocus
sometimes you have to use autofocus if you are paparazzi or sport photographer or birds photographer .
but what about other kinds of photography : Portrait , kids , weddings , pets , macro , landscapes , street photography , still life

do you trust autofocus 100% ?

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Cream of the Crop
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Jul 11, 2012 00:12 |  #2

Not 100%...I'd say 99%...every now and again I MF stuff for the hell of it...but I generally trust AF, especially since my eyes aren't perfect.

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Jul 11, 2012 00:33 |  #3

I shoot mostly action and sport with fast lenses 24L+85L+135L+300L2.8 .. and autofocus is never better than 80% with 1DMKIII, 70% with 50D and 50-60% with 5DMKII
For macro => 10% :rolleyes:
As walk-around, travel, landscape and portraits, there is no focus points where I would like some to be :mrgreen: or I am not fast enough to change focus point to the right place.
So it's faster with manual focus (I use centre focus point to focus approximatively to the place I want , then I re-frame, and at last I make a fine focus with one finger :confused: ).

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Jul 11, 2012 00:41 |  #4

It depends on the situation sometimes you do not need AF. To me I use AF all the times but in a rare occasion I must do manual.

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Jul 11, 2012 00:44 |  #5
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i use it 99% of the time but I don't trust it 100%, especially when i am using the Siggy 50 :(

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ed ­ rader
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Jul 11, 2012 00:50 as a reply to  @ kin2son's post |  #6

do you trust autofocus 100% ??

yes. i trust it better than my aging eyes but i still take multiple shots if it's an option.

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Jul 11, 2012 01:00 |  #7

With the EOS 5D and EF 50mm f/1.4 which I have as a set for my wife to make baby images I have to use the AF. And everytime I use this set, I am angry about AF.
I have the feeling that I am much faster with 5D with EE-S and Minolta Rokkor 58/1.2 lens. Probably with this not all 100% pictures are absolut correct focussed where I want - but I do get the picture which is sharp enough.

Normaly (>99°%) I do not use AF.
Don´t like the non "L" Canon EF leses build quality and don´t like the "L" EF lens price. But I do own some converted Canon FD "L" lenses - and my feeling is, that most Canon FD lenses have a build quality like EF "L" lenses.

I have used autofocus when I started DSLR photography for my portrait and nude photography. There I had very often the problem with low contrast on pure skin, so need to search for points with nearly the same distance and more contrast / structure. Now with manual focus no problems.
I trust AF for ~20%.

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Jul 11, 2012 01:37 |  #8

No, not 100%. Been having problems with the 5D III and the f2.8 24-70 in very low light (using a 580 Speedlite to compensate) and the lens/camera doesn't seem to want to autofocus correctly. I get in very low light situations I'm finding myself manually focusing the majority of the time.

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"I'm the original idiot"
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Jul 11, 2012 03:13 |  #9

If I get the locked-on message, then yes. But often AF refuses to do so, then I switch to manual.


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Jul 11, 2012 03:24 |  #10

Nothing is ever 100% but death and tax

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Cream of the "Prop"
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Jul 11, 2012 03:30 |  #11

I know I'd miss a helluva lot more than the camera misses so yeah, I trust it pretty much full time...

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Jul 11, 2012 03:31 |  #12

7up wrote in post #14700148 (external link)
do you trust autofocus 100% ??

Yes, esp. when combined with selective AF. 100%, for belly dancers all over the world. You cannot possibly manually focus fast enough or accurately enough, particularly in low-light one finds in restaurants, clubs, and some stage shows, even with a FF camera with an ultra-bright viewfinder. Used correctly, AF automation is better and faster than humans, for these situations. In fact, I would say I would not trust not having it.

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Tupperware Party Sheep
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Jul 11, 2012 03:36 |  #13

I trust it more than I trust my ability to speedily use MF

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Jul 11, 2012 03:41 |  #14

99.9% I do have a couple MF only lenses and they are just fine. AF has been pretty good to me. I usually take several shots to make sure one of them is properly in focus, but I also will micro adjust my lenses to make sure they are focusing properly.

Overall, if the lens I am using has AF, I will use AF 99.999999999% of the time. The only time I turn it off is when I am shooting a scene that I don't want the lens constanly refocusing for, night time, or macro. Also maybe I have a crazy hair up my @$$ and I actually FEEL like using MF, otherwise AF lens is set to AF.

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Jul 11, 2012 03:47 |  #15

7up wrote in post #14700148 (external link)
but what about other kinds of photography : Portrait , kids , weddings , pets , macro , landscapes , street photography , still life

do you trust autofocus 100% ?

For landscapes and still life, when I'm always using a tripod, I always focus manually, zoomed in 10x with Live View. If I'm shooting handheld, then I almost always prefer auto-focus. The exception would be in tricky situations where auto-focus gets confused by objects in front of my subject or sometimes in very low-light situations; then I'll focus manually while also shooting handheld.

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do you trust autofocus 100% ??
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