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09-10-2011, 06:03 PM   #1
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Are my images over noisy

Here is a link to a cropped of a photo I took yesterday, do you think that there is more noise than you would expect at ISO400? My photos mostly look line when fitted to my screen but if I zoom in at 1:2 there is more noise than I would expect.
https://picasaweb.google.com/102266651534763504610/Random#5650900636034559282
Thanks

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09-10-2011, 06:26 PM   #2
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Would be nice if the full exif were intact (the forum automatically shows it if it's available; the picasa link is broken). Is this a 100% crop?

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09-10-2011, 06:35 PM   #3
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Sorry, trying to work out why the link isn't working.
Thanks

Edit: hopefully link should be working now. You can find the full exif data there and can see a 100% image. I think the one shown here is at around 90% anyway.

Last edited by Smilesy; 09-10-2011 at 06:46 PM. Reason: FIxed link
09-10-2011, 06:48 PM   #4
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If thats 100% crop then I don't see much in the way of noise - the focus appears to be more to the foreground of the image and there appears to be a bit of murkiness to the air in the background.

I think my K-x would look about the same.

09-10-2011, 07:06 PM   #5
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Ok, maybe I'm just expecting too much. The images look fine at any size I'm likely to print at anyway, so it doesn't really matter. I just need to stop pixel peeping.
09-10-2011, 09:08 PM   #6
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Hard to tell...

QuoteOriginally posted by Smilesy Quote
Ok, maybe I'm just expecting too much. The images look fine at any size I'm likely to print at anyway, so it doesn't really matter. I just need to stop pixel peeping.
Like Adam said, it is hard to suggest anything without seeing the EXIF data.

However, I would think that this could have easily been shot at ISO 80 or 100 with the aperture opened up a bit more. There are definitely times when you would need to shoot at ISO 400 outdoors in daylight. However, those times usually involve capturing a fast moving object by increasing the shutter speed, or shooting totally within shadow with a slow lens. I am guessing that neither is applicable here.

Also, you can change the sharpness with a menu selection. That would help. You can also play with in camera ISO noise reduction. I usually turn that completely off though because I find that it slows the camera down and masks poor exposures. I feel like it is a better challenge to get the exposure right.

Don't give up. There is always room for improvement.
09-10-2011, 09:30 PM   #7
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It's kinda underexposed. That'll make it noisier.
09-12-2011, 07:19 AM   #8
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Thanks for the respones. Next time I'll try using a low ISO and see if that helps. Here is the exif data:
Date 10 Sep 2011 12:03:35
Camera PENTAX
Model PENTAX K-r
ISO 400
Exposure 1/13 sec
Aperture 11.0
Focal Length 18mm
Flash Used false
White Balance 0
Metering Mode 5
Exposure Programme 3
Exposure Bias 0.0
Date and Time (Original) 2011:09:10 19:03:35
Colour Space 255
X-Resolution 72.0
Y-Resolution 72.0
Resolution Unit 2
Exposure Mode 2
Focal Length (in 35 mm film) 27
Lens smc PENTAX-DA 16-45mm F4 ED AL
Lens ID 4 254
Lens Information 160/10 450/10 40/10 40/10

The sky in the image is pretty bright, hence the fore ground has underexposed. I think if I had bumped up the exposure much more it would have clipped a lot of the bright area in the sky.

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