Stock agencies like ShutterStock reject more photo submissions for image noise and artifacts than about anything, no matter how well a photo is conceived, composed etc. Doing a variety of venues myself, in many dark and substandard lighting situations and with the no flash rule, how can we shoot at ISO 800-3200, even with f2.8 and larger aperture lenses and get our images noiseless? Of course utilities like NoiseNinja or NeatImage are helpful to clean up the images, but usually not enough to be acceptable by the stock buyers.
I have seen some very nice images in the critique sections or rejected submissions catagories that were not accepted due to noise. In the film days of pushing film, it was the same issue.
Anyone have any insight on how to keep noise at a minimum, enough to be accepted by stock houses?