1 Reply Latest reply on Jul 21, 2007 10:19 PM by (Mike_Mander)

    noise reduction applied to high ISO .tif files in ACR 4.1?

      Evidently ACR 4.1 applies noise reduction to high ISO raw files from Canon cameras, even when noise reduction is turned "off" in the plug-in (and this results in smeared detail). I have a 5D that I bought specifically for its lack of noise in high ISO files, and I don't want a software program forcing me into using noise reduction and ruining all those marvelous details in my high ISO raw files. Can someone tell me if there is a similar problem with ACR 4.1 if you open a .tif file with it? If not, I'm thinking I'm going to use Canon DPP 3.02 to convert my raw files to .tif, and then use ACR 4.1 to quickly adjust exposure, black point, etc., all of which is awkward and slow in DPP 3.02.

      Rob
        • 1. Re: noise reduction applied to high ISO .tif files in ACR 4.1?
          Level 1
          No, although ACR v4.1 does apply some baseline noise reduction to many raw files, I do not think that it applies any default NR to TIF files. Lightroom v1.1 does not apply any noise-reduction to TIF or JPG files by default, at least as far as I've noticed, so I believe this will likely carry over to ACR v4.1 as well. Of course you *can* turn the NR sliders up from zero and then it will! In any case, you'd be advised to test that theory yourself just to make sure, before designing a workflow around that assumption...