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« on: December 16, 2020, 03:01:27 PM »
I suspect you are experiencing increased noise because you are under exposing your images.
Think about Signal to Noise ratio.
In photography the signal is Exposure. Think of the sensor noise as a constant, although external factors like heat can increase noise.
At correct exposure the noise is not visible. As you begin to under expose you images (reduce the signal strength) the noise becomes more visible. If you find that you need to brighten the shadow areas of your image in Post production, you will see noise in those parts of the image, because post production adjustment increases both the signal and the noise, making the noise more visible.
Using analogue gain in the camera will help, but will also increase the noise. Digital gain just increase signal and noise together, ie no advantage if your goal is quality.
For noise free images use more light, closer to the subject, use faster lenses and read the many posts on this forum about this subject. If you cannot do this you will not fix the problem.
If you are sure that your zero gain image exposure is perfect, post the DNG file so others can help you assess.
The noise has nothing to do with colour issues. Re colour, buy a grey card/ white card, use the custom white balance feature on the camera, shoot RAW and make fine adjustments in post production, or you might have to learn to love purple.
As for the chef shot, this image is both under and over exposed in the same frame. Unfortunately you cannot fix this image. It was doomed from the start because of the lighting.
Some people think photography is about cameras and lenses, when the most important thing for a professional is the lighting. This is a classic example of too much light in the specular highlight on the stainless steel sieve and not enough light everywhere else in the image. Watch some you-tube videos on lighting techniques and have another go. You have lots of good options here, like a side or back light, and most photographers use more than one light for a reason.
Here's a good hint, If you are standing at the mouth of a cave looking in, the light would be very similar to the chef image. If you want the chef to look like he's in a cave, you've nailed it.
If you want him to be in a nice bright kitchen, light the background. If you want him in the dark, and your attention is on the stuff falling out of the sieve, then backlight the stuff falling out of the sieve, and leave the area behind the action nice and dark for contrast.
Lighting is hard, but once you start thinking about it you will see a dramatic improvement in your images.
FYI I am a professional photographer with 35 years experience and I am still learning and enjoying the challenges of making amazing images every day. The Chronos 2.1 can make beautiful broadcast quality images, but you will need to work hard to get those images. Not bad for the price.
Good luck!
Col