noise at iso100

I am getting noise in my images shot at iso 100. These are shot with da70mm ltd lens in good daylight with k10d set in raw mode. Is this normal? Here are some cropped images.

[IMG]http://i266.photobucket.com/albums/ii271/kiwao/IMGP4536.png[/IMG]
[IMG]http://i266.photobucket.com/albums/ii271/kiwao/IMGP5854.png[/IMG]
[IMG]http://i266.photobucket.com/albums/ii271/kiwao/IMGP5852.png[/IMG]

Thanks

Mike

Could you add the EXIF info as well as originals (uncropped).

This would help a lot.

Mike,
To be honest, I can't see any noise in those shots!
What I do see is that you've shown the out-of-focus areas in each shot - that creamy, blurry look is not noise, but the bokeh of the lens.

Noise would appear as a fine speckle - like grain on film. The quality, and quantity, of noise (or any processing artifacts) will vary depending on what RAW converter you are using.
Matt

I can't see any noise either. Nice bokeh, but no noise.

They certainly don't look noisy to me either - lovely bokeh from the DA70 though!

Thank for your replies. It seems that I cannot tell the difference between Bokeh and noise although the third image seems a little speckley in the background to me. Lightroom always recognises these areas as noise with its little warning triangle next to the luminous noise slider. But it does get fooled by fine details sometimes.

Anyway it is good to get the opinion of experienced photographers. Thanks again.

Mike

Don't forget, noise isn't always a bad thing! Some photographers go out of their way to create noisy pictures as it can create a certain type of atmosphere. Photography (like all art) is subjective - if you find a picture pleasing to your eye then don't allow a piece of software to tell you any different.

The last two are definitely noisy. I think my monitor is particularly unforgiving.
I love 'grain' on film but the horrible smudgy noise that digital makes really doesn't light my candle.
Kiwao, try moving your exposures to the right on the histogram (towards over exposed). under exposed areas are where the noise will lurk.

I think slight underexposure combined with slight oversharpening will induce some noise and artifacts.
at any iso.
how are you processing your files?

I thought I could see a very fine speckling, but getting up close to the monitor, I realise it's the grain from the monitor's pixels I was seeing. These are more obvious in the darker parts of a photo, as is actual noise.

I don't think they're noisy, except possibly a little in the very dark areas, like the child's hair.

Yes but the fact that the last two look noisy on my LCD monitor (very sharp), but the first one looks fine, suggests I can tell the difference
For instance, the the dark black gradients on this page don't look noisy. There's some horizontal banding on the large ones where the graphic has been stretched that's all.

I can't see any noise either. What I can see, occasionally, is some (moving) Moray fringing. But that's down to my monitor, not these images.

well, call me a cat amongst pigeons (or any thing else you want) but you guys need to get new monitors.

Or maybe you do

What is your monitor, by the way?

I am enjoying the comments than you very much. When I bought the da 70mm lens after I noticed that the images were out of focus which was so annoying as this lens is supposed to be pro quality according to some reviews and also for me it was expensive. So over the last month I have had my camera/lens back and forth to Pentax for front and back focusing problems. They say it is ok. So now I am inspecting every last thing in my images. May be I am seeing things that aren't there. I 'll upload complete images later and you can see for yourselves

I uploaded the images from lightroom as unprocessed images cropped at 100%. As for underexposure I thought in raw mode the camera is set so the image is underexposed to prevent blown highlights I think?. My images tend to be atleast .5 underexposed so do you think it would be ok to dial in +.5 or is it better adjust when processing.

Thanks again for your comments.

Mike