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DPChallenge Forums >> Photography Discussion >> Focusing for keepers...
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04/13/2012 10:09:55 PM · #1
I have been trying manual focus to see if I could do a little better than in auto. For today's portrait outing with my 3 y.o. daughter I was shooting manual focus using AV at f4 to f5 range. I threw away 40% of shots due to poor focus alone. (I had to delete another 40% due to poor posing, expression, motion blur.) My keepers ended up being 20% of all shots. Horrible!! (At least my exposures wasn't an issue!!!)

I will try to do the calcs for shooting auto on the next outing.

I just wanted to ask on a typical landscape or portrait or nature type photo shoot, not including action, how many shots are you throwing out due to poor focus? Percentage wise...


04/13/2012 10:33:39 PM · #2
landscape/still life i always manually focus. i don't throw out any due to poor focus.

people are a different story... no way i am that accurate that fast.
04/13/2012 10:45:24 PM · #3
Landscapes are nice and slow. I don't trust my eyes, so I've always done center point focus, point, focus, switch to manual, then make my shots. Occaisionally I'll move the focus point so I don't have to recompose...but I find that slow.

With a wide angle lens, I will manually focus based on distance...just get to know your lens and understand the hyperfocal distance so things close and far are in focus for the aperture. I don't do the math, just wing it.

For landscapes, my focus is 90% or better. I screw up sometimes.

I've never found it quick enough to move focus points around for people though, so it's center point, half press, recompose, then shoot.

However, I've been experimenting with less important shots to see if I can find a focus mode that actually does what I want "automatically" and is reliable. This passover, at the family seder, I tried using 3D focus with the center zone area on my Nikon, and it was pretty good. I could use my point and recompose technique, and that acquires the target, and "most of the time", it stays with it. I also tried that while we were on the trip at the zoo. I'd have to go through too many shots to actually get statistics, but I am pretty happy with that technique. I got "mostly" keepers...just a few where the camera missed.

That all being said, I think the quality of autofocus is also dependent on your lens.
04/13/2012 11:17:32 PM · #4
There is NO way that manual focus is better then AF. At least not with me. I shot a basketball game tonight shooting at F3.2 on a F2.8 lens. I shot 91 action photos, 87 were dead sharp.

Portrait sessions last week I shot over 500 images in my sessions. I didn't throw away a single frame for focus.

Quite honestly if you are having that much issue to throw away AF and try to depend on MF you either have technique or equipment issues.
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