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How can i avoid chrome noise whilst using tele-photo lens


tamasalucy 4 141 United Kingdom
18 Jun 2013 9:45PM
I have taken quite a few photos using 100-300 tele-photo lens but when i process the image there always seems to be noise. my camera is a Canon D600 is the a problem with this or the lens or my settings.

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robthecamman 3 1.4k United Kingdom
18 Jun 2013 9:55PM
i thought noise came from using to higher iso
franken e2
12 3.3k 4 Wales
18 Jun 2013 10:03PM
What iso are you using?

Ken
tamasalucy 4 141 United Kingdom
18 Jun 2013 10:23PM
I have used several zoo settings and have recently been using auto ISO but with the noise is still there if you look on my portfolio you can see
Gundog 1 624 Scotland
18 Jun 2013 10:35PM
If it is chromatic aberration from the lens, the Lightroom lens profile for that lens should remove most of it automatically. If not you can use the manual adjustments in LR (and, presumably ACR).
Jestertheclown 6 6.6k 242 England
18 Jun 2013 10:48PM
It's not 'chromatic aberration' that's the problem; it's 'chroma noise.'
However, looking at the most recent images in your pf., I can't actually see any!
Unless, that is, you're referring to the shot of the swan with its head in the water, the fourth one in.
That one, I'd say has been cropped from a much larger original which in turn had been taken from a little way off and zoomed in. As a result, some Jpeg. artifacts are present but still no noise.
That's not to say that it's a bad shot; it's just that given the circumstances, assuming I'm right, it's a failing that all Jpegs. have.
Why don't you upload an image that you consider noisy to here and we'll have a look?

Bren.
Nick_w e2
7 4.1k 99 England
19 Jun 2013 6:46AM
First of all chromatic aberations and chroma noise are not the same thing.

I had a look at your pf unfortunately you have stripped the exif info. Are you shooting RAW if not start to. Then in the converter there will be 2 sliders. One for chroma and one for luminance noise. Generally have these set at zero, but if noise is present increase the chroma (in this instance) until you are happy. Watch out for loss of detail tho.

I'm guessing your at high ISO - but you can get noise at any ISO in the shadows if you underexpose, then try to recover in the processing.
mikehit e2
5 7.1k 11 United Kingdom
19 Jun 2013 8:19AM
These were taken at ISO 2500 so noise is not a surprise
http://www.ephotozine.com/user/tamasalucy-129343/gallery/photo/untitled-34055958

http://www.ephotozine.com/user/tamasalucy-129343/gallery/photo/untitled-34055986

with an aperture of f13 you could have gone to f8 to give yourself a stop to play with and pulled reduced ISO to 1200 (shutter speed of 1/250 would have been about right for the subject).
As Nick says, you will have to apply some level of noise reduction in post processing and should still get very useable images, especially if you shoot raw.
iancrowson e2
4 211 129 United Kingdom
19 Jun 2013 8:45AM
I suggest you post a photo with this problem in the Critique Gallery with complete data and explanation of problem. It's difficult to advise or comment without seeing an image.
19 Jun 2013 9:14AM
Yes, you have prominent chroma noise in some of your images - as you are supposed to have with very high ISO and underexposure caused by very tight aperture ( up to 32!). Some images look like you tried to process them and had it overdone a bit Wink
Good news is - your camera is most likely OK. At your current level I would recommend you aperture priority mode ( check with your camera manual how to set it), ISO set to 400, and aperture to 8. Camera will find an appropriate shutter speed automatically. This will allow you to make some decent shots under wide variety of circumstances. For further development you need to buy a good book on photography and go through it with the camera in your hands, you will get there with time. As for your images - while them being technically imperfect, I liked a few of them for subject choice and your approach to it.
Cheers!
stone12 2 2 Ireland
19 Jun 2013 12:37PM
If you were having prints from them, wonder what size would be fine for detail and not show noise or chroma? I think I read somewhere,that unless you were printing to a size of three foot across,dont worry about the small imperfections.
19 Jun 2013 1:58PM
Unfortunately, chroma noise is a nasty beast. Unlike luminance noise that is pretty much random or creates some very fine pseudo-structure, chroma noise may come in huge unsightly blotches clearly seen even in small images. I could see it even in real small images from OP related gallery. Look at the the large dark plain areas of the images.
tamasalucy 4 141 United Kingdom
19 Jun 2013 3:39PM
Thank you for all the helpful comments I will try to take on board all the advise and hopefully it will show in some of the next photo.
stone12 2 2 Ireland
19 Jun 2013 5:03PM
I could be totally wrong, and I expect I will be told so if that is the case. But would turning the white balance down a couple of notches help this chromatic aberration?
Nick_w e2
7 4.1k 99 England
19 Jun 2013 7:30PM

Quote:I could be totally wrong, and I expect I will be told so if that is the case. But would turning the white balance down a couple of notches help this chromatic aberration?


Its not chromatic aberation ! And no turning it down could theretocaLly increase it as there would be more blue channel which has more noise typically.

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