RAW images grainy

[Julian_T]

Why is there SO much grain in all my RAW images? Even in the best lighting, there is unwanted grain. I'm a professional photographer and for some reason cant find a way to stop it. Any tips?

[BillyGalaxyS10Tab]

You're ISO is set to high.
In photography, ISO refers to the sensitivity of your camera's sensor to light. Higher ISO values mean the sensor is more sensitive to light, allowing you to capture images in darker conditions, but it can also introduce more noise or graininess into the photo. Lower ISO values result in cleaner, less grainy images, but require more light. 

[Julian_T]

Thanks for the response, but I'm well aware of the ISO and its effects whether high or low. No matter what I adjust its still very grainy

[maird]

It can depend on what you photograph, which camera you use and how you view it. They are probably 12MP images, or 4kx3k. AFAIK there are no Samsung phones or tablets that can display them at full resolution on screen so not only are they down sampled from most of the recent phone cameras, they are further down sampled to display. These both create a more grainy view. What happens if you look at a smooth blue sky RAW image (without sun or moon) on the device and, when displaying it, zoom in to the 1:1 magnification and scroll to see the full image?

[maird]

Here's a recent S25U raw shot of mine. The only constant color area is the the sky and seems smooth but even the rocky and varied plant landscape doesn't look grainy to me. I admit focal point is probably the near field rendering the mid and far field perhaps blurred but the bits of clear sky should have picked up any grain.