kenabr Loc: S.E.Wisconsin

I took a close up with a 20mm f1.8 lens with my Nikon D750 at 10,000 ISO. I was testing out a free trial of Topaz DeNoise AI. I was amazed at how it cleaned up the noise much better than Lightroom. I'm going to do further tests but I am fairly convinced this a major improvement in noise reduction software.

Ysarex Loc: St. Louis

Pictures?

rcarol

My experience with DeNoise AI is mixed. Most images show a remarkable improvement but some images are splotchy after being processed. That is parts of the image show signs of not being processed while other parts are processed as expected.

Jerry G Loc: Waterford, Michigan and Florida

I used the free trail of Denoise AI and thought it did great at removing noise but found you really needed to check the photos for excessive artifacts.

Woodsman Loc: North of Peterborough Ontario

I recently purchased Denoise as well and am impressed with it. I use it as a plugin to Photoshop and find quite often that the preview when processed is not brought into Photoshop properly. Sometimes it takes 2 or 3 attempts. I also find the clear all option often does better than the Denoise option at least on the files I am processing. I have taken some seriously noisy shots on purpose and it works well as long as you dont over do the noise reduction. I also tried Sharpen AI but found it too hit and miss and did not purchase that one. Denoise though has been working much better than the Photoshop noise filters for me.

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

All my images are run through Topaz. Yes, it is very effective, as is the sharpening tool.

jerryc41 Loc: Catskill Mts of NY

Yes, that does have a good reputation for clearing up noise, hence, its name.

sandiegosteve Loc: San Diego, CA

I shoot my D750 at 10,000 often for poorly lit sports venues. It is a great body. Noise comes from many variables including how you process them. I think exposure is most important (get it right in body so you don't magnify it in post). 8000+ ISO I shoot jpeg and get solid results. My measure for solid is sales and not getting rejected by editors. If I can get lower ISO shots, I will always try that.

I'm glad you are liking your results. When you already have confidence in your outcome it helps you focus on composition and getting a good shot.

DVZ Loc: Littleton CO

Here is an in-depth article on ISO from DPREVIEW. It seems cranking up the ISO on camera is not quite what I thought it was. I was under the impression that increasing the ISO was somehow making the sensor more sensitive (I thought by increase current, I do know.). But it appears just collects the same amount of light that hits it regardless of ISO and it's in the processing. This means that ISO invariant sensors you can just as well underexpose if you need to keep the shutter speed high and post-process it to desired lightness. I think I'll re-read this because I read it quickly and missed a lot. So if I got this wrong feel free to correct but gently so I can hear you, I tend to ignore angry internet anonymity.

https://www.dpreview.com/articles/5426898916/ins-and-outs-of-iso-where-iso-gets-complex

Ysarex Loc: St. Louis

ISO is one of the most misunderstood topics in digital photography. Richard Butler's two articles in DPReview are excellent and most thankfully accurate. I hope they help alleviate some of the confusion.

Correct -- changing ISO does not alter the light sensitivity of a digital camera sensor. You either expose it to capacity or you don't. ISO simply establishes the mapping of a measured exposure to a set lightness in the camera's final output image. And as Richard well explains ISO does not standardize implementation so the camera manufacturers are free to achieve the end result using multiple methods and they do. Bottom line when you increase ISO you're telling the camera meter you want to reduce exposure. If you follow the meter then the sensor receives less exposure (which is the primary cause of noise) and then the camera's ISO implementation uses one or another processing method to get the lightness in the camera JPEG normal.

Knowledge is power right? I understand how my Fuji XT-2 implements ISO which allows me to manipulate the result. The photo below was taken with the camera set at ISO 12,800. It's an APS (1.5 crop) sensor. Now that's not the camera JPEG -- it's processed from the raw file and as Richard points out in that article ISO doesn't apply to raw data files. I manipulated the camera's raw processing and I did not expose as the meter indicated. The primary cause of noise in our photos is a weak signal = not enough exposure.

Joe

(Download)

lamiaceae Loc: San Luis Obispo County, CA

You should not be getting noise with a D750 except at such absurdly high ISOs. And use a Nikkor 50mm f/1.4 film or FX lens for testing.