Grain Problem (?)

[Dominik Muench]

hi guys

i received my LCD today and noticed something that seems unusual to me...i hope I am wrong and its not a hardware problem....

on certain colour temperature settings, the image in the EVF and on the LCD becomes veeerrry grainy.

I attached two screen shots where you can see the temperature settings. The first one is less grainy with a higher temperature and the second one is...well..really grainy.

when i increased the ISO..the blue grain became less apparent and when i went down below 2000K the whole image had a bluish tint.

This shot was taken in my room with normal tungsten lighting.

is there something wrong with my camera ??

thanks for any help.

 

[Marcus Struzina]

Hi Dominik

Doesn't look like a hardware problem to me, this high ISO / tungsten combination of settings giving grain is pretty normal for the Red camera.
The chip is daylight balanced and rated at about 320 ISO . The blue channel is usually the noisiest on any digital camera so when you underexpose 2 stops and then expose under tungsten light ( which has much less blue than daylight ) the chip is really not getting much exposure on the blue channel at all. Then when you do an in camera colour balance you turn down the usable red/green channels and boost the underexposed blue channel massively you get this extreme grain, does this make sense. Correction filters or going with tungsten being warm is the go.

Marcus


www.belladonnathemovie.com

 

[Dominik Muench]

makes a lot of sense, thanks for clarifying that

 

[David Mullen ASC]

Also, the peaking function can make the monitor noise look worse in low light.

 

[Dominik Muench]

thank you david