A question about noise
Jan 13, 2018 13:34:18 #
I am in my not-so-well light studio. I have the ability to put some more light on my subject, but it could create glare. My other option to use a slower shutter speed. Without raising ISO, (Please note, I do not want to raise IOS.) Does a longer shutter speed raise noise?
Jan 13, 2018 13:44:41 #
Chefneil wrote:
I am in my not-so-well light studio. I have the ability to put some more light on my subject, but it could create glare. My other option to use a slower shutter speed. Without raising ISO, (Please note, I do not want to raise IOS.) Does a longer shutter speed raise noise?
Camera on a tripod, with longer shutter speed does not raise noise without raising ISO.
Jan 13, 2018 13:45:05 #
Chefneil wrote:
I am in my not-so-well light studio. I have the ability to put some more light on my subject, but it could create glare. My other option to use a slower shutter speed. Without raising ISO, (Please note, I do not want to raise IOS.) Does a longer shutter speed raise noise?
Noise depends on the camera sensor to start with.
Noise is ALWAYS present.
Lowering the speed may work IF the subject is static (ie object). Whatever glare you mention will be enhanced. Control that by playing with the light placement and diffusion.
Better solution IF the subject is static, shoot two three frames and merge them together using calculation in PS CC.
Jan 14, 2018 04:53:20 #
Chefneil wrote:
I am in my not-so-well light studio. I have the ability to put some more light on my subject, but it could create glare. My other option to use a slower shutter speed. Without raising ISO, (Please note, I do not want to raise IOS.) Does a longer shutter speed raise noise?
Long exposures "can" add noise, but unless you are talking about exposures that are minutes in length you probably won't see a problem with that.
Jan 14, 2018 07:14:54 #
Chefneil wrote:
I am in my not-so-well light studio. I have the ability to put some more light on my subject, but it could create glare. My other option to use a slower shutter speed. Without raising ISO, (Please note, I do not want to raise IOS.) Does a longer shutter speed raise noise?
I'd try for more light - without glare. I don't work with artificial light, but there are many ways to properly light a subject. I'm sure we have lighting experts here who can help.
https://www.google.com/search?q=lighting+a+subject+without+glare&rlz=1C1CHBF_enUS726US726&oq=lighting+a+subject+without+glare&aqs=chrome..69i57.5838j0j4&sourceid=chrome&ie=UTF-8
Jan 14, 2018 07:34:05 #
Rongnongno wrote:
Whatever glare you mention will be enhanced.
Extremely long exposure can create noise, but you're not going to see those exposure lengths during the day, even in doors in a studio. What I would like to know is how 'glare' is enhanced by longer exposures?
Jan 14, 2018 09:36:21 #
mrjcall wrote:
Extremely long exposure can create noise, but you're not going to see those exposure lengths during the day, even in doors in a studio. What I would like to know is how 'glare' is enhanced by longer exposures?
Light is additive. Glare is created by a reflective surface or the lens/filter. The longer the exposure the more glare. A Polarizing (PL) reduces the glare, the exposure in this instance would still be reduced in a long exposure.
Note that extremely long exposure might create heat noise, a different beast. This noise is not random and easily correctable. Basically a couple of pixels are weak.
As to long exposure in daylight, those are created using a ND filter and can be in minutes. Also one user on this web site creates images using paper, his ISO is 8 so... Talk about daylight loooong exposure.
Jan 14, 2018 13:27:03 #
sirlensalot
Loc: Arizona
It's pretty much about the direction, quality, and quantity of light. I think some experimentation is in order.
Jan 14, 2018 14:58:06 #
Glare is just a lighting situation you learn to deal with, work around or eliminate. Almost everything has glare if the lights aren't in the right place. This has nothing to do with shutter speed or ISO. Glare at 60th is glare at 500. Move your lights. Reposition your subject. Youtube a lighting video. You said "could create glare." Don't worry about it until it is a problem then work to solve it. Professional Photography is a world of problem solving. That's one of the things that makes it so fun.
Chefneil wrote:
I am in my not-so-well light studio. I have the ability to put some more light on my subject, but it could create glare. My other option to use a slower shutter speed. Without raising ISO, (Please note, I do not want to raise IOS.) Does a longer shutter speed raise noise?
Jan 14, 2018 15:10:28 #
Chefneil wrote:
I am in my not-so-well light studio. I have the ability to put some more light on my subject, but it could create glare. My other option to use a slower shutter speed. Without raising ISO, (Please note, I do not want to raise IOS.) Does a longer shutter speed raise noise?
Only if it is very long will a longer shutter speed raise noise.
Most modern digital cameras can work quite well at 400 or even 800 ISO.
If adding light produces glare for you, perhaps you need to invest in some appropriate light modifiers, such as scrims, gobos, soft boxes, umbrellas, diffusion flats... and the education needed to use them.
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