What’s Your Preference?

Zhennie · #1 (**permalink**) 07-19-2010, 11:48 AM

Can anyone please explain why is there noise at iso 200 in this picture? Is someting wrong with the camera?

I've been having d5000 for a few months now, and recently I noticed that at iso 400 there is too much noise, so I deliberately lowered it so much the day I took this photo - but I was badly surprised to see that noise again... I am attaching a photo to look at.

part of the EXIF:

ISO: 200
Shutter speed: 1/2500s
Aperture: F/7.1
(The original photo was shot in NEF)

I will appreciate any help...

kirbinster · #2 (**permalink**) 07-19-2010, 01:42 PM

I don't really see the noise, but you are shooting a scene with extreme brights and darks which is beyond the dynamic range of any sensor. I have no clue what you did in post processing so its hard to really comment. I shoot at 1600 with very little noise with my D5000 - but you have to nail the exposure to be able to do that. If you are processing and adding exposure you will get noise.

Shokinen · #3 (**permalink**) 07-19-2010, 02:03 PM

I think you are confusing noise with bokeh. Are you refering to the little dots you see in the background ?

This picture is noisy
http://farm5.static.flickr.com/4027/...3b122649_o.jpg

See the difference ? It's all grainy rather than blurry. But you can only see it when you look at the original size.

Smaller version look much better

lynweber · #4 (**permalink**) 07-19-2010, 02:06 PM

I don't see the noise either all i see is bokeh.

Zhennie · #5 (**permalink**) 07-19-2010, 02:09 PM

I don't think that I confuse noise with bokeh.

Here is a 100% crop of the image above. You're saying this is not noise?

http://picasaweb.google.com/lh/photo...eat=directlink

junglebear · #6 (**permalink**) 07-19-2010, 02:30 PM

If you go to 100% everything is noisy, especially where dark meets light

scootermcq · #7 (**permalink**) 07-19-2010, 05:29 PM

Don't smell your pixels......

Almond.Butterscotch · #8 (**permalink**) 07-19-2010, 05:55 PM

don't taste them either. I hear they taste like motor oil.

inkista · #9 (**permalink**) 07-19-2010, 06:55 PM

Quote:

Originally Posted by Zhennie

Here is a 100% crop of the image above. You're saying this is not noise?

Nope. Not noise. Those are pixels.

[blow anything up enough, and you'll start to see the individual pixels]. Looking at anything at 100% crop is to magnify it a helluva lot more than we used to do with loupes and light tables. It's akin to putting your negative under a microscope.

Noise would be more random-colored than that (color noise), or more light/dark random (luminance noise) than that.