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Old Jan 10, 2007, 3:32 PM   #11
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This is a crop of the back of the duck's head and part of it's back. As you'll see, the focus isn't quite at the same spot (I was using a manual focus lens and making changes, so with that small of a DOF and all, I knew I'd get some variations).

K10, Natural:
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Old Jan 10, 2007, 3:34 PM   #12
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This is fantastic, MtnGal.... thanks so much for your time and effort with this.

And hope you get to feeling better! :-)



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Old Jan 10, 2007, 3:35 PM   #13
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I didn't bother to crop the raw versions of this picture because other than some differences due to the raw conversion, there wasn't any difference when it comes to noise. I should mention that my ACR defaults have been changed and they now do not include any noise reduction or sharpening.

For the K100 pictures:

1600 bright:
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Old Jan 10, 2007, 3:36 PM   #14
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K100 3200 crop:
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Old Jan 10, 2007, 3:37 PM   #15
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K100 natural 1600 crop:
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Old Jan 10, 2007, 3:38 PM   #16
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K100 natural 3200 crop:
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Old Jan 10, 2007, 3:50 PM   #17
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I'd be interested in what others think, especially looking at the 100% cropped parts. I'm not at all trying to stir up any controversy and I'm not trying to say that the K10 is terrible (just the opposite - I love my K10!). But I'm willing to be a realist about things.

My conclusion - if you are going to be taking pictures in natural low light using high ISOs, the K100 will do better at 1600 than the K10, but I don't like the K100 at 3200 at all. I do think that the natural modeK10 pictures shows some sort of strange color noise pattern at 100% crop, but am not sure if it would qualify as "banding." I don't see it as much with the natural mode picture.

This was no scientific test, and the sun was rather playing hide and seek through a general hazy overcast, so the light wasn't completely consistent - perhaps slight variations in exposure is to account for it instead of any difference between the two modes. I don't find it to be particularly horrible, though it would limit how much I could crop a picture and how big a print I would make.
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Old Jan 10, 2007, 4:00 PM   #18
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Interesting, the K10 and 100 are almost equal at 1600

Iso 1600 is very usable if you ask me. I think they even look a little better than my DL @ 1600.

So far I've only found 1 use for 3200: at acoustic concerts it sort of provides a "film grain" than can actually fit the image. Other than that I stick to 1600 in difficult situations, but I prefer 800 and a fast lens. (combination ISO 800 + SMC-A 50mm 1.7 hasn't let me down yet indoors )
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Old Jan 10, 2007, 4:02 PM   #19
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Again, thanks a million for putting this together.

I think we all know that any 6 mp sensor is going to have cleaner high ISO shots over even the best 10 mp dSLR's. That's a given.

But as you demonstrated, the K10 and K100 are NOT light years apart when it comes to noise levels. Is there a difference? Sure. But not a significant differencewith normal size prints. 100% crops always reveal a multitude of sins... and for 'me', my type of picture taking doesn't involve pixel peeping at 100%.

That being said, yes, the K100 does have advantages at ISO 1600. But like you said, ISO 3200 is just about useless. I think the K10 holds its own for noise levels - especially compared to the Sony Alpha.

Doesn't the K10 have more ISO stops than the K100? Seems like there's an ISO 640 and ISO 1000.... which should come in handy if you're wanting higher ISO levels without creeping into ISO 1600.

Thanks again... this has been very informative!










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Old Jan 10, 2007, 4:47 PM   #20
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You can either have the ISO go 100, 200, 400, 800, and 1600. Or you can set it so that it has intermediate stops, such as 125, 160, 250 and so onthrough 1250.
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