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Noise Issue With Sigma 120-400 And Canon T5I


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#1 ninety7expo

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Posted 28 April 2015 - 10:10 PM

I like to shoot birds I am have severe noise issues. I try to stay at 1/1600 to 1/2000 iso 100 AV around f8 @ 400mm. I can not get these pictures sharp. Is that normal or maybe my settings are off? Maybe I just need better technique I dont know at this point.

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#2 P Bender

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Posted 28 April 2015 - 10:20 PM

Your settings should not cause any issues with noise. Does the lens produce sharp images at shorter focal lengths?
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#3 ninety7expo

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Posted 29 April 2015 - 05:15 AM

Im not sure I will have to do some test shots.. but I did notice that anything above iso 100 at 400mm introduces a lot of noise. I'm thinking its because they are really small birds and I need to crop. 



#4 JestePhotography

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Posted 29 April 2015 - 06:30 AM

We'll if you under expose an image and then move your exposure up or try to lift shadows, voila:noise. Don't know if this is an issue but it is one possibility.

#5 P Bender

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Posted 29 April 2015 - 08:58 AM

Ninety seven, set you ISO in auto, let the camera expose the picture, watch your histogram, the exposure should make it into the right side of the histogram. This will insure proper exposure. Take some more shots and post the results, with settings. Keep shooting, keep posting, practice makes us better!
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#6 ninety7expo

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Posted 29 April 2015 - 11:56 AM

ok here is a picture I took with Hisogram I did not edit it so you can see what I am looking at. Maybe Its just normal but when I shoot landscapes I never have this problem. If you blow it up you can see the grain..

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#7 cuda

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Posted 29 April 2015 - 12:02 PM

How far away are you from your subject. All lenses have a limit if you go past that and try to crop the image it will have significant noise.

#8 ninety7expo

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Posted 29 April 2015 - 12:08 PM

This image not far I was sitting in my back yard bird was in a tree 20ft maybe. But I am looking at some of my other images not of still birds but landscapes and flying birds and all were shot with very low iso and shutter speed. histogram all mid to left and I think that could be part of the issue here. Im just not use to the higher iso noise. 



#9 P Bender

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Posted 29 April 2015 - 12:20 PM

I see noise in the sky, that is common in primary colors, red, green and blue. Only one out of three or four pixels showing color. The areas that are in focus have much less noise that I can see.

For this static subject 1/400 second would lower your ISO helping with noise also.
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#10 geedee

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Posted 30 April 2015 - 09:02 AM

Looks to me that the bird is well in the shadow, as Jeste suggested it seems logical that the bird being the subject it is under exposed, and if you brighten it up in PP you will get noise... who knows what  the camera was taking the light reading from..?

 

 I took a lot of pics like this a while back as the feeder and area around it where there was most of the in-range bird activity was in the shade, and I had the benefit of a tripod though if I slowed down the shutter in a bid to brighten things up a bit, I got blurred images due to the fidgeting of the birds, especially the small ones... used flash to improve things a bit which it did though still not happy. The pics I took like yours when the bird was brought up in PP ended up with blown out sky... yup it can all be a bit of a juggle..



#11 JestePhotography

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Posted 30 April 2015 - 07:20 PM

This is one of those times you need to ignore your histogram. Spot meter on the bird AND add .7 EV even +1 against a blue sky. Yup you may very well blow out the sky. But are you shooting the sky or are you shooting a bird.. On overcast days you may need to go +1 to + 1.7 to expose the bird properly.
You can always add nice blue sky later..
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#12 ninety7expo

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Posted 30 April 2015 - 08:46 PM

Thank you all. I will try it out over the weekend and let you know.

#13 cuda

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Posted 01 May 2015 - 02:27 PM

I agree with Steve, when shooting birds you need to spot meter them and add at least a .5 ev and focus on the eyes.




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