|Home||About us||Commercial Photography||Print Gallery||Articles/reviews/blog|
Canon 7D Noise and ISO
Full Stop or 1/3 stop settings...
Some time ago I tested the dark frame noise for all the ISO settings of the 1Ds3.
As a result I only use it at 'whole stop ISO settings'I've got a 7D on loan from Canon and just repeated the test.
A series of shots were taken with incremental ISO settings:
The camera was set to manual, 1/2000 of a second and f22 in a dimly lit room
There was a lens cap on and the viewfinder was covered.
So, no light getting in. It's -just- noise I'm looking at.
ACR (5.5) Settings:
No ACR noise reduction, no sharpening, 4 stops exposure increase (to show up noise), black level at zero.
As you can see, at 12800 ISO and 3 stops pushing of the speed (112k equiv), there is a lot of noise.
I've turned off any camera noise reduction too.
Those of a more exacting nature might want to repeat this with NR turned on...
I'll just show the histogram settings below for each ISO setting.
The EOS 7D results are nowhere as clear cut as they were with the 1Ds3.
However the camera is handling sensor noise, it seems to increase much more smoothly than with the 1Ds3
Thank you to everyone who has ever purchased something via these links. If you follow a link and then buy absolutely anything it helps me run this site (the articles are all written by myself in my spare time)
- Keith (Other ways to help the site)
Amazon UK link / Amazon France / Amazon Germany
Amazon USA link / Amazon Canada link
Not the obvious difference I saw with the other tests, so this camera I'll be inclined to leave on 1/3 stop increments.
If anyone does a really thorough version of this test... please do let me know?
You can leave Comments/Questions about this Article at the blog
The views in this article represent those of Keith Cooper.
Keith is always happy to discuss matters raised in his articles. You can Email Us
Northlight Images prides itself on its independence when giving advice. We do not sell hardware or software and have no direct commercial links with any of the software or hardware vendors that may be mentioned here. See our Review Policy for more information.
You can search all the hundreds of articles on the site for more information
Have you found an article on the site useful or helpful? If so, please consider sharing a link to the article or mentioning it on a forum - Thanks to everyone who's helped the site become better known. Explore our site... Digital Black and White photography and printing - some of Keiths thoughts, techniques and tips for those interested in a digital approach to black and white. New site content appears on the News, articles and reviews page. We've lots of original Photography Articles and Photography Reviews on the site to help anyone interested in photography.Thanks to the visitors who've made Amazon purchases (any kinds of items whatosever)
via: Amazon UK/Amazon France/Amazon Germany/Amazon USA/Amazon Canada
It won't save extra money we're afraid, but it does help in the running of the site, and we really appreciate it...
Commercial Photography - Architectural Photography - Industrial - Print Gallery - Landscape Photographer