Author Topic: A900 noise issues  (Read 16631 times)

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Offline Simon [aka springtide]

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Re: A900 noise issues
« Reply #15 on: November 04, 2009, 04:26:39 PM »
On the subject of noise, I noticed on the 'other' forum a post saying that DxO had just released v6 of DxO Optics Pro.  I've been toying with the idea of testing it so went to have a look and a bit of a surf around for comparisons between DxO and LR.

Found this page (translated from French) but the performance of DxO on the high ISO looks pretty awesome...

Dominic

Dom,

Thanks for posting about DXO v6.  I just emailed them stating that I'd only just upgraded to Elite (in June) and they gave me a fre upgrade.  Just had a very quick play, and the butterfly shot I posted above looks very clean in DXO.

Hmm, nows there's a thing to think about.... 
Should I switch to using DXO to process my RAW files, output them to DNG, and complete the editing on LR?

It's just, I'm struggling with fully commiting to DNG (and deleting the original RAWs).....  but maybe I should worry too much.  I guess I should check to see if some of the other apps I use support DNG.
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Offline Fud

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Re: A900 noise issues
« Reply #16 on: November 04, 2009, 04:34:01 PM »
Simon on their website they quote three different ways to work with DxO and Lightroom including calling it from Lightroom.  Let me know what you think of it as I have been taking a lot of photos recently in the ISO800-1600 range and whilst some don't show much noise the sporting ones under light tend to.
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Offline Rand47

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Re: A900 noise issues
« Reply #17 on: November 10, 2009, 10:35:15 PM »
A900  16-35 CZ, ISO 1600   Noise reduction done in Lightroom 2.  The image is a little soft, but I think the noise acceptable for such a low light shot, and slightly underexposed by necessity.


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Re: A900 noise issues
« Reply #18 on: November 24, 2009, 12:09:40 PM »
I use up to iso 100 regularly but even iso 3200 the noise issues are very easy to clean up in lightroom. IMHO the whole ISO noise issues are simply created by camera review websites so they have something to write about.



Not always true, I'm a sports photographer and shoot in low light a lot, I also have to keep my images a biggish size for printing so resizing is not a option.

If I take my sony on a low light day I'll put the camera away, a noisy image is useless to me. You can't sharpen it, retouching is harder and over-all the image looks poor no matter what you do.

As for NR programs, I've found most are pretty much a waste of money.

Offline Clive

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Re: A900 noise issues
« Reply #19 on: November 24, 2009, 02:14:52 PM »
Rand 47... I like that. Thanks.

dowden photography ... "If I take my sony on a low light day I'll put the camera away, a noisy image is useless to me. You can't sharpen it, retouching is harder and over-all the image looks poor no matter what you do."

There are a lot of experience professional photographers here who will dispute that.

And "As for NR programs, I've found most are pretty much a waste of money." Ditto.

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Offline Stef.

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Re: A900 noise issues
« Reply #20 on: November 24, 2009, 04:30:39 PM »
Rand 47... I like that. Thanks.

dowden photography ... "If I take my sony on a low light day I'll put the camera away, a noisy image is useless to me. You can't sharpen it, retouching is harder and over-all the image looks poor no matter what you do."

There are a lot of experience professional photographers here who will dispute that.

And "As for NR programs, I've found most are pretty much a waste of money." Ditto.

Clive

I would like to politely disagree ;) Noise Ninja and some other programs are fantastic and the choice of a lot of professional photographers. FWIW: I just would like to add that I was involved in a discussion regarding noise issues in all cameras the other day with software professionals and one point that was mentioned was very interesting IMHO: there are two choices of noise reduction generally speaking: a) in camera b) in software. Now it is the question what you prefer: the camera to do the job or yourself? Don't look at low ISO shots look at the ones at 6400 - what you can achieve in post-processing when you know what you are doing is outstanding and IMHO beats any noise reduction IN camera. But than keep in mind that's my own opinion.
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« Last Edit: November 24, 2009, 09:34:34 PM by Stef. »
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Offline AScot

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Re: A900 noise issues
« Reply #21 on: November 24, 2009, 08:26:32 PM »
Stef, I must agree.

With all respect to dowden photography and to Clive, to say that "As for NR programs, I've found most are pretty much a waste of money." is to ignore that many professionals use these programs with great success. They do have a steep learning curve in order to use them correctly. Make and maintain the effort to learn and you may be pleasantly surprised.

I am still struggling with NR but have had some success. The problem is with me, not the programs.
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Offline REX (aka TG)

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Re: A900 noise issues
« Reply #22 on: December 11, 2009, 12:08:51 PM »
To all of you that own the a900/a850.

If i reduse the resolution at 12MP how much difference in noise do i have on the same picture with 24MP at full resolution?
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Offline steve

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Re: A900 noise issues
« Reply #23 on: December 11, 2009, 02:54:08 PM »
Hi
I downloaded neat image software and cant believe how good it is. Simple to use and the results are stunning.
As regards to reducing resolution it does make things a bit cleaner i used to do it with my A700. But to be honest i shoot all my wedding pics at half resolution any way.I can print up to A3 and beyond with a few tweaks and unless you get within inches of the pic you cant tell the differance. IMHO

  Regards Steve

Offline Stef.

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Re: A900 noise issues
« Reply #24 on: December 11, 2009, 05:06:16 PM »
Steve- you don't need to shoot the image at half resolution. You can also just export them @ half size from the RAW converter (should you shoot raw). It does make a difference but than using any of the noise reduction programs can give superb results.
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Offline Theresa

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Re: A900 noise issues
« Reply #25 on: December 24, 2009, 11:11:42 AM »
Steve- you don't need to shoot the image at half resolution. You can also just export them @ half size from the RAW converter (should you shoot raw). It does make a difference but than using any of the noise reduction programs can give superb results.
Stef.

There is no less noise shooting half resolution than with the full res.  There is 50% more!  The only reason for shooting with APS-C res. is that you will not have light fall off in the corners with lenses designed for APS-C.  The issue of noise with the a850/a900 is blown far out of proportion, at least when shooting RAW which is the only reasonable IMHO thing to do with a camera of this quality.  The greater number of pixels more than compensates for the extra stop of noise. 
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Offline FarmerDave

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Re: A900 noise issues
« Reply #26 on: December 24, 2009, 05:17:57 PM »
Welcome to the board. You are A850/900 user then?
Agreed, noise "issue" was blown out of proportion when the A900 first came out and Sony's own RAW processor was terrible but only game in town. Also with people who was shooting JPEG's pushing ISO3200.
I suppose the Canikon crowd wanted something to hammer the A900 with.

Offline Sarie

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Re: A900 noise issues
« Reply #27 on: December 28, 2009, 04:52:08 PM »
I use up to iso 100 regularly but even iso 3200 the noise issues are very easy to clean up in lightroom. IMHO the whole ISO noise issues are simply created by camera review websites so they have something to write about.

How will noise reductions work with other software like Elements or Define. How would you determine that a picture is good or acceptable with minimum noise impact.
Sony a900 | Sony a380 | Sony 18-50mm | Sony 55-200m | Sony 50-ƒ1.4 | Sony CZ 24-70 & 16-35 ƒ/2.8 | Sony 70-400 G | 2 X Sony HVL F58AM | Sony HVL F20AM |
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Offline Stef.

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Re: A900 noise issues
« Reply #28 on: December 28, 2009, 05:07:55 PM »
Steve- you don't need to shoot the image at half resolution. You can also just export them @ half size from the RAW converter (should you shoot raw). It does make a difference but than using any of the noise reduction programs can give superb results.
Stef.

There is no less noise shooting half resolution than with the full res.  There is 50% more!  The only reason for shooting with APS-C res. is that you will not have light fall off in the corners with lenses designed for APS-C.  The issue of noise with the a850/a900 is blown far out of proportion, at least when shooting RAW which is the only reasonable IMHO thing to do with a camera of this quality.  The greater number of pixels more than compensates for the extra stop of noise. 

Theresa- welcome to the forum. Re. shooting half the resolution or downsizing to minimise noise issues please do read David Kilpatrick's article where he explains the procedure: (David is a highly regarded reviewer for photographic magazines such as British Journal of Photography)
http://www.photoclubalpha.com/2008/10/23/the-alpha-900-as-a-high-iso-body/

Nevertheless, while this procedure works pretty well I prefer to use noise ninja in post-processing.

Quote
How would you determine that a picture is good or acceptable with minimum noise impact.
I do not judge my images by 100% viewing on screen but by test prints. (I come from the traditional darkroom school and that's how I have done it then and now ;) )

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Offline steve

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Re: A900 noise issues
« Reply #29 on: December 28, 2009, 06:25:37 PM »
Welcome back stef.
I know that shooting at half res does reduce noise as have been doing it at higher iso for years. Couldnt be bothered to argue the toss.lol Have a good new year.

 Regards Steve