Noise at iso 100??

[carinlynchin]

I don't understand. I had a tripod and the camera was at iso 100, f 16, 30 sec exposure and i was shooting in RAW....
with the software I downloaded....stepok's raw importer, for some reason it doesn't give me much of the exif information...not sure why...but anyway look at how this picture came out when I imported it in jpeg version....

[edbayani]

i think the noise shows up when your exposure is long (16 secs.) it would have been worse at a higher iso

[Gonzo13]

Not sure which camera you are using but some are noiser than others. Some also have noise reduction in them when there are longer exposures. Look through your manual to see if your camera does.

[teaking]

Usualy with RAW the files are nosier than the JPEG version as RAW is dumped camera data from the sensor and requires noise reduction in post processing.

Also at night the longer shutter speed could be causing the noise try increasing your ISO or decreasing your aperture or both to try to get your shutter speed lower and see if it makes a difference.

[kirbinster]

IF your camera has something called longexposure noise reduction you defintiely want to use it. Basically it takes your picture and then takes another one of the same duration with the shutter closed - it then subtracts out the second picture to remove noise.

[kencaleno]

All images contain noise. To have acceptable noise in your images requires you to have adequate lighting,and correct exposure.Ken

[carinlynchin]

oh okay...i didn't know if it was normal. I have a canon digital rebel xt. I really want to upgrade but I might have to wait until tax return season and also bribe my love with a new 4 wheeler HAHA

[sybren]

Rebel XT? That's what the rest of the world calls a 350D, right? I have that camera, and indeed it can get noisy. In shots like this you'll get better result when you over-expose a tad. Most of the noise is in the dark areas. When you over-expose you can darken the image a bit in post processing, pushing the noise back to black.

[dcclark]

Two things are contributing to the noise in your photo:

1. Long exposure -- as bits of the sensor heat up, they start to show up as noise. If you go for a really long exposure, it'll show up all over the photo as a purple/pinkish "haze".

2. Lots of blues. I'm not sure about the theory, but blue areas (such as snow at night) tend to show noise more than most other colors.