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Editting fix for high ISO?

Roger Christian , Jul 16, 2007; 03:01 p.m.

I screwed up... there it is out there.

Grabbed my 30D that was last used by me for some outdoor daylight pics, not knowing my wife used it for some indoor activity. She had bumped the ISO to 1000.

Grainy, grainy, grainy...

Any chance there is some post-editting that can be done to adress this? The upside is that i can retake these pics fairly easily.

Thanks for your help.


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Rob Bernhard , Jul 16, 2007; 03:15 p.m.

DPP, ACR, Lightroom, and all the others have tools for reducing digital noise.

They may look grainy at 100% but have you tried printing, printing, printing?

Keith Lubow , Jul 16, 2007; 03:24 p.m.

1000 should not be so bad on the 30D, as long as they are exposed properly. I prefer noise to any sort of noise-massaging, as it looks less unnatural. Keep your prints small and you should be OK.

The most important lesson in this experience is to learn to judge light without a meter, so you know if something is up. I just use BDE as a starting point. Your exposure setting should have screamed out to you that something was amiss.


Andy Witkowski , Jul 16, 2007; 03:34 p.m.

Noise Ninja is good.

Roger Christian , Jul 16, 2007; 03:55 p.m.

Thanks for your responses, sadly though Keith your comment about keeping prints small is the biggest problem. The shots were to be for a 22x24 canvas print for my Mother-in-Law.

Plenty of lessons learned here, some of which you have responded with. Probably the biggest is to not be in a hurry as I was today. Tomorrow the sky looks clear and sunny, and with luck I can have another go at it.

Ronald Moravec , Jul 16, 2007; 04:08 p.m.

Neat Image.com

Keith Lubow , Jul 16, 2007; 04:52 p.m.


To print a 22x24 from a 20D/30D, you will be printing at about 93 dots per inch without upsizing. That is only slightly better than internet quality. If you do upsize that much, it will be plainly visible in the print. This may be a time for the rental of a Hassie, especially since you will be printing close to square format anyhow.


Keith Lubow , Jul 16, 2007; 05:03 p.m.

Or, you could use Genuine Fractals, and you would own the program for less than you would spend on a rental of a high-end camera. Still wouldn't beat the quality of a large piece of film/sensor, but it would be better than upsizing in Photoshop.


Puppy Face , Jul 16, 2007; 05:43 p.m.

Try the NR feature in DPP 3. It works well for light to moderate noise but not as god as a dedicated plugin. However it's free.

Marco Suarez , Jul 16, 2007; 05:56 p.m.


Preferably you would take the picture again with a tripod and low ISO. There's no need to go rent any equipment as the 30D is very capable of giving you an image file worthy of uprezing. What you do is you bring the file into photoshop and increase the size of the image in intervals increasing it by 10% each time until the desired size is achieved. Be sure that the bicubic smoother option is on and the results should be fine. As for the noise i don't know of any software that can beat the results of taking the picture again. Of course if you grayscale the image then the noise would be minimal and not as noticeable, increase the contrast a bit and it should be virtually unnoticeable - behind glass and a frame most people don't see it. Good luck.

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