cinematography camera issue

hey,

When I practice lighting I notice that when I move my camera "behind the scene" where theres dark basically and shoot the enlightened scene and notice a bit of grain. However, when shooting "In the scene" where theres light sourouding the camera everywhere there seems to be a bit less grain. Is it just my camera (1/8) or a problem with every cam?
 
Yes, noise will be more evident in darker images/scenes.

I dont think you quite understand my question. Im asking why is noise more evident when youre shooting a scene but from a darker viewpoint. Example: shooting an afternoon scene BEHIND the lighting equipment.

I tried shooting by placing my equipment behind the camera and shooting at the scene and notice theres less grain. Just wondering why. I hope I made it more clear.
 
If light is spilling onto the lens, you could be getting flares and what not? Are you zooming in from being farther back? If it's a digital zoom it will amplify noise. Also, on cheaper zoom lenses that don't maintain a constant aperture, there more you zoom the higher the aperture and which means your letting less light in and having to boost the darker areas with more gain.
 
If light is spilling onto the lens, you could be getting flares and what not? Are you zooming in from being farther back? If it's a digital zoom it will amplify noise. Also, on cheaper zoom lenses that don't maintain a constant aperture, there more you zoom the higher the aperture and which means your letting less light in and having to boost the darker areas with more gain.

Like I said, im being behind the lighting (behind softboxes, worklights etc) and the scene is very well lit. But behind the camera is darkness. And when I move the camera out of dark and in front of the lighting where theres no more dark behind - then there is less grain.
 
Like I said, im being behind the lighting (behind softboxes, worklights etc) and the scene is very well lit. But behind the camera is darkness. And when I move the camera out of dark and in front of the lighting where theres no more dark behind - then there is less grain.

Yeah, dude. I think you entirely missed the point of Paul's speculation.

What he's saying is that it might not be an issue of how light or dark the area is, in which your camera stands. Instead, it might possibly just be an issue of how far away you are from the subject, and thus, how much you are zooming-in. What he's saying is that the more you zoom-in, the less light you'll be letting in. In order to compensate for less light being let-in, the camera amplifies the image, resulting in noise. We don't know if that's what the issue is, but it sounds like a very reasonable possible explanation to me.

By the way, if the scene is "very well lit", I can't imagine there'd be darkness anywhere on the set.
 
I think its automatic gain setting. You may not be able to do anything about it

When your camera is in the forwards position all of the FRAME (the scene is irrelevant) is lit brightly, and the camera turns down the "gain" automatically.

When you move away from the lit scene, your frame is now showing stuff BESIDES the well lit scene. This means your AVERAGE light level in the frame is less. Your camera tries to compensates by increasing the "gain" giving you noise..
 
@Cracker Funk - thanks for elaborating on that but I wasnt zooming in at all! It depends on what your definition of "well lit" is. Im saying its not all dark, ofcourse theres some light bouncing from walls spreading around, but im saying is that its still darker than the lit scene.

@wheatgrinder - thats what Ive been thinkin too. :) thanks
 
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