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02-21-2011, 12:46 PM   #1
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K7 Action Shots in the Snow

I've been experimenting for a couple of weeks now, trying to get good shots of my dog Oliver running towards me. When cropped to 50 or 100%, he looks grainy (noisy) but the snow is fine.. Not sure how to import EXIFF data, but lens is Tamron 28-75 2.8, I set the camera Tv 1500, ISO 200 or 400, Continuous focus, centre weighted metering.
What am I missing?

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02-21-2011, 01:23 PM   #2
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I know this probably isn't what you want to hear and someone else may come up with a better answer. When I was trying this with the K7, I found it difficult as well. The AF-C wasn't the greatest at focus speed when tracking. I found it easier to go with manual focus and fire rapidly.

02-21-2011, 01:29 PM   #3
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What Jeff didn't tell you is that he also found it easier to buy a K-5 and let it do the focusing... All done properly.
02-21-2011, 01:57 PM   #4
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QuoteOriginally posted by JeffJS Quote
I know this probably isn't what you want to hear and someone else may come up with a better answer. When I was trying this with the K7, I found it difficult as well. The AF-C wasn't the greatest at focus speed when tracking. I found it easier to go with manual focus and fire rapidly.

I'll try anything, but it's tough when it's -20C with no gloves on! Is Tv 1500 to fast for this? He's not a race car after all.. Maybe 500? (keeping around f8 for DOF)

02-21-2011, 01:58 PM   #5
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My little helpful advice when shooting in a mostly snow covered scene. I know you said you think the snow looks fine... Let the camera cheat the exposure a bit. The snow will reflect quite a bit of light and tell your camera that the scene is very bright. Try adding at least 1/2 stop or +0.5 or +1.0 on the Exposure Value Compensation. This will give you a slightly slower shutter speed and your subject will be better exposed although this may not help with your other issue.
02-21-2011, 01:59 PM   #6
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QuoteOriginally posted by Ubuntu_user Quote
What Jeff didn't tell you is that he also found it easier to buy a K-5 and let it do the focusing... All done properly.
The K5 was just coming out in Canada when I bought the K7 (up from my K100D) and about $1000 more........ But it does seem to fix all the flaws in the K7..
02-21-2011, 02:01 PM   #7
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For action shots, the K-7 & AF-C are not always the best setting. While I use AF.C, from times to times, my preference is to use AF-S with Hi continous shooting. I obtain typically 1-2 good shots over a burst, sometimes more.

I may add that a good lens can help a lot. I get simply a large perrentage of good shots with the FA31mm and Voigtlander 58mm than with the DA18-250mm. Yes the Da18-2500mm is a bit slow but the IQ of the two primes is very impressive.

Food for thoughts...
02-21-2011, 02:10 PM   #8
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The noise and the focus are separate issues (mostly). You should be able to tell if you're getting correct focus; the posted versions are too small to tell for sure.

The noise may be because of the exposure, and possibly your processing software. The posted photos look a little underexposed. With the light behind the dog in the left photo, his front is all in shadow. Those are already areas where noise will be visible. If you try to increase brightness, exposure, curves or other settings in processing, the noise gets brighter too. Although the photo was at ISO 200 or 400, moving a slider up in processing is very much like shooting at ISO 800 or more.

If you have a chance to reshoot, try to increase exposure without raising ISO. This is where noise and focus are related a little. If you don't have enough light, you can't use small apertures to have a lot of depth of field, so focus errors are magnified. And if the dog is fast, a slow shutter speed produces motion blur. Raising ISO just makes noise worse. One thing you could do if the light is too dim is have the dog run into the sun, not away from it.

02-21-2011, 02:13 PM   #9
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QuoteOriginally posted by hcc Quote
For action shots, the K-7 & AF-C are not always the best setting. While I use AF.C, from times to times, my preference is to use AF-S with Hi continous shooting. I obtain typically 1-2 good shots over a burst, sometimes more.

I may add that a good lens can help a lot. I get simply a large perrentage of good shots with the FA31mm and Voigtlander 58mm than with the DA18-250mm. Yes the Da18-2500mm is a bit slow but the IQ of the two primes is very impressive.

Food for thoughts...
Hadn't tried that! Even if one or 2 are sharp, the delete button takes care of the rest! Did`t know that AF.S would work with Hi Continuous. Is that the Burst setting I read about
02-21-2011, 03:08 PM   #10
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QuoteOriginally posted by GoldenRGuy Quote
Hadn't tried that! Even if one or 2 are sharp, the delete button takes care of the rest! Did`t know that AF.S would work with Hi Continuous. Is that the Burst setting I read about
Hi continuous shooting works with both AF-S, AF-C and MF. The K-7 has a good buffer size (bigger than the K-x/K-r) and I enjoy the Hi continuous shooting performances.
02-21-2011, 03:09 PM   #11
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QuoteOriginally posted by Nowhere Matt Quote
+1.0 on the Exposure Value Compensation
Like he said, +1 EV should do the trick. 1/1500 is pretty fast, just shoot ISO 100 or 200 with less shutter speed.
I normally do a pre-focus and shoot burst when possible.
F5.
Aperture priority.
68mm. (DA*60-250 f4)
1/320s. (exposure compensation +1).
Metering mode, pattern.
ISO 100.
WB, Auto.

Last edited by Ex Finn.; 11-11-2014 at 05:49 PM.
02-21-2011, 03:23 PM   #12
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QuoteOriginally posted by Ex Finn. Quote
Like he said, +1 EV should do the trick. 1/1500 is pretty fast, just shoot ISO 100 or 200 with less shutter speed.
I normally do a pre-focus and shoot burst when possible.
F5.
Aperture priority.
68mm. (DA*60-250 f4)
1/320s. (exposure compensation +1).
Metering mode, pattern.
ISO 100.
WB, Auto.
Awesome shot! for +1 EV, do you have your camera set to 1/3rds or 1/2's?
02-21-2011, 03:32 PM   #13
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QuoteOriginally posted by GoldenRGuy Quote
I'll try anything, but it's tough when it's -20C with no gloves on! Is Tv 1500 to fast for this? He's not a race car after all.. Maybe 500? (keeping around f8 for DOF)
I'm sure 500 is enough to catch Oliver. It isn't impossible with the K7, just difficult.

I'll never get the Hound to run directly at me. When the camera comes out he heads for higher ground behind a bush or something. However, If I'm prepared for it, I can get him with a manual focus lens. This was taken with a Sears 55mm f1:1.4 at 1/800, ISO 100. Couldn't tell you what the aperture was though (but it was done with a K7).



http://farm5.static.flickr.com/4046/4566961202_e0fa4c3d63_o.jpg

You can pixel peep if you want, yes, it's a little grainy, probably just like yours (which don't look too shabby) but for my purposes, it's fine. One problem with the AF-C that I've always found is the camera will take the picture even if nothing is in focus. For this reason, when using an auto focus lens, trying to catch action I use either the AF button or continue to press the shutter button (half for auto focus) and take the picture when I hear the beep (in AF-S). The K5 gives us the option when using auto focus, in Both modes, to not take the photo unless Something is in focus.

If your tamron has an AF/MF switch, you might also look into Catch In Focus. Page 128 in the K7 manual.

02-21-2011, 03:35 PM   #14
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Set for 1/3 steps at the moment.
I can not see the noise in your dog pictures, (that golden pup exposed pretty good IMO) should be able to adjust curves in PP and do little NR if need be to save the images. But yes, try +1 next time with little slower shutter.

Cheers, Mike.

Last edited by Ex Finn.; 02-21-2011 at 03:43 PM.
02-21-2011, 04:38 PM   #15
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QuoteOriginally posted by Ubuntu_user Quote
What Jeff didn't tell you is that he also found it easier to buy a K-5 and let it do the focusing... All done properly.
If tracking action shots really matters, you're better off buying a Nikon. Nikon's tracking performance is in a different class altogether.
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