acceptable noise from the 7D

this was a quick snap in a pinch that i took
i see alot of noise, is this an acceptable level?
f4.5
1/13
iso 1600

when zoomed into the dark area of the tv it shows some pretty bad hot pixel's

To be honest, I can't see noise at this resolution. Not saying it isn't there, just that it's not very visible at Internet resolutions. But let me throw out a few ideas...

Did you need to increase exposure (brighten up the image) in your computer? If the original image is underexposed, that will greatly increase noise.Was it a JPEG or a RAW file? If JPEG, what noise reduction did you have set in the camera? If RAW, what did you use to convert it and did you apply some noise reduction during the conversion?

You mention hot pixels, which are something different. If you run the camera's sensor cleaning, that might map and block actual hot pixels from future images.

It also appears you used flash for the shot. Dust specks in the atmosphere or perhaps on the front of a TV screen can be emphasized by a flash and cause something that looks like noise, but isn't.

I agree. I cant tell the noise here. do you have a 100% crop on a part where you see the noise? Ive shot at ISO 2500 and its still fairly acceptable. then again, I rarely if ever need to shoot at that ISO.

see below:
full pic:

I guess I shouldn't have shot 80% of my 7D images at 3200 or over!

TeamSpeed wrote in post #12489301
I guess I shouldn't have shot 80% of my 7D images at 3200 or over!

Yeah... the real trick to avoiding noise in your photos is to have enough light. People seem to end up underexposing their images at higher ISOs and then complain about camera performance.

I find I get more noise in the lighter transition areas with my 7D, not in the shadows. NR handles it very well as long as I get the exposure correct.

The 7D is definitely touchier than the 40D or 5DII with exposure IMO.

I don't see any noise. I bet if you printed it you wouldn't see noise.

There's noise in the ceiling and wall assuming that this isn't an artex bounce shadow effect. However, apart from this it looks pretty clean.

I agree it does not look sharp, but noise it not the problem. Seems like exposure, could the light coming thru the window throw everything off?

sixsixfour wrote in post #12489268
I agree. I cant tell the noise here. do you have a 100% crop on a part where you see the noise? Ive shot at ISO 2500 and its still fairly acceptable. then again, I rarely if ever need to shoot at that ISO.

EOS 7D
1/10 sec
F/3.5
15mm
ISO 2500

Very nice Nissan GT-R, by the way.

Miguel

jfueng wrote in post #12489579
I don't see any noise. I bet if you printed it you wouldn't see noise.

I think you nailed one of the biggest problems. People don't print their images to see if there's any noise. Instead they pixel peep and view it in a way that it will never be seen. Print it frame it and enjoy it.

Taken directly from the Imaging Resource review of the 7D...

I can't see any noise in the sample posted.

TeamSpeed wrote in post #12490893
Taken directly from the Imaging Resource review of the 7D...

I agree. I also want to comment that there is some noticeable difference between looking a picture on a computer screen (such as a notebook), compared with how the same picture looks in a large full HD television set. I have a 46 inches Samsung LED full HD TV, and the pictures there look fantastic, even when you look at them at close range. But more amazing, is how good a 100% crop of a given image looks at the same TV, which implies a very very large print would be possible.

Miguel