I do any noise reduction in photoshop using "neat image".

I always use the lowest ISO setting on the camera.

Sony R1 I am using Noise Ninja to deal mainly with chroma noise. Luminance noise does not bother me. I like some grain in pictures. I think only chroma noise should be filtered in-camera, it usually does not hurt fine details. Luminance noise reduction is more difficult without losing fine detail. Should be done using special NR SW on PC. The R1 doesn`t remove chroma noise in-camera. But that`s OK, I mainly shoot RAW.

Using a d50, shooting above ISO 200 just doesn't cut it.

I use NR at anything from ISO 800 and up.

I regularly shoot high school football at 3200 with a Nikon D2HS using NR filtration. I have had very good results. Exposure is critical.

Canon D20, and I have no noise problems. I wish I had 3200, 6400, 12800, 25600, and up because of the slow lenses these days.

I work with 1600 speeds and above on a regular basis and find that although still a bit grainy with the NR filter I don't really mind. At times in low light at a wedding when I don't want to use a flash I don't mind the added graininess at the risk of losing the shot or using a flash and disturbing the ambient light.

I use Define with EOS 20D setting, sometimes fade it a bit to keep sharpness in main areas.

There are times that I'm not very comfortable with NR filters. Something about the finsihed product makes me think FAKE/Overdone.

I use a Canon EOS 20D. I submit to microstock photography sites and use Noise Ninja to remove the noise at just the right amount. I sometimes even use noise reduction at ISO 400, especially if the available light wasn't enough when the photo was taken.

I shoot with the Canon 5D, and the images are great at high ISO 1600.

I think still the technology needs to offer better answer to our problems.

On my 5D, there's really no need to use any noise reduction, as the noise is tight like film grain, but on my 20D, at ISO 3200, I regularly use Noise Ninja to retain my image clarity.

I have more of an issue with loss of dynamic range than I do with noise at high ISO.

Recently,while shooting my grand sons comminion all of my outside shots were at ASA200 after entering the church i found I was not able to use my flash, by changing my ASA to 800 and 1000, I was able to get usable shots in doors under available light which i later enhance in Adobe Photo Elements. I am using a Nikon D-70 with a 18 to 70 for close shots and a 70 to 300 for shots at the alter from a distance. My cameras NR was in effect.

I shoot with a Konica-Minolta A2. I am waiting to purchase another similar camera, when noise is vastly improved in the higher ISO settings. It's great that higher ISO's are offered, but if the noise is unacceptable, what's the point?

I shoot with a KM 7D, I shot my sons Marching Band competitions at night under stadium lights for the band yearbook. Used a Tokina AT-X 80-400 4.5-5.6 at f250 with an ISO of 3200 used in camera NR, and all keepers required the use of NR S/W during processing.

If working in color, I tend to use Noise Ninja to dramatically decrease the noise at higher ISO's, if the image is worth that much work. B/W images can benefit from the extra noise, so I don't always worry about trying to correct them. I shoot a Canon 20D and can typically shoot up to and including 800 ISO without any problems with excess noise.

I shoot live theater productions for local group. At low light levels Nikon D50 works quite well with only 6 megapixels on APS-C sized chip. If needed, I use Stoik Noise Reduction on processed image as final step.

Nikon D50. I use Noise Ninja Pro with Photoshop CS3 Extended. Shooting in the RAW format, I can get acceptable breaking news shots by setting the sensitivity to 1600 and the exposure compensation to minus three. Fine art photographers may need to take a Valium before trying this, but when the light is dim, when tripods and flashes are not options, and gallery quality prints are not needed, Noise Ninja and Photoshop work wonders.

On the Canon 20D, 800 is really the maximum. Actually I find 200 the cleanest and everything above somewhat noisey.

I use auto Noise reduction.