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Will someone offer me a lesson in photography?
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Forum Regular
Join Date: Jul 2003
Location: Toronto, Ontario
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I just purchased my Canon s400 and I read through the manual and I still don't understand some of the terms and how/when to use some features. For example:
Exposure Compensation
Light Metering Modes
White Balance
ISO speed
Flash Exposure Setting
I would greatly appreciate it if someone would enlighten me as to under what conditions I should be using what when.
THank you !!!
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Powerbook 12" 1GHZ, 1.25GB of RAM
My blog
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Forum Regular
Join Date: May 2002
Location: Minneapolis, MN
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Exposure Compensation
Light Metering Modes
White Balance
ISO speed
Flash Exposure Setting
First off if you are using the Canon Automatic modes. (Sports, Portriat, landscape, Macro, ect..) These will not mean anything to the way that you take your pictures. In Manual Mode they do.
Exposure Compensation.
Basically this is a way to add or subtract light from your pictures. (Over/Under Expose). The camera is going to give you a light meter reading. Something like 1/125 second at f4. That is what the camera thinks the film (digital pic) should be exposed at. But lets say the face of the person you are taking a picture of is in a shadow. You might want to add some light (over expose) Exposure Comp is a quick way to add/subtract small amounts of light to the picture.
Light Metering Modes
Canon ussually uses 3 metering modes. Spot metering, Center Weighted and one other that I can't think of. Basically what this does is sets the camera to look at the light diffrent ways so that if there is a really bright spot in the center of the image that the camera won't use that area to meter the light and make the rest of the picture under exposed
White Balance
This is a term that actually comes from the video side of the world. In it's simpliest form is that light is measured in degrees Kelvin. A ny day has a higher temp (around 5200 degrees kelvin or higher) a cloudy day has a lower temp around 3200 degrees. With the temperture change white looks diffrent (more orange under higer temps and more blue under lower temps) so you set a white balance to your scene you are shooting so white is the proper color (or lack there of technically) and all other colors are based off that white balance.
ISO Speed
Same as film speed iso 100, 200, 400, 800, ect..
Flash Exposure setings
same as exposure compenstaion but on level more as it includes variables for the on camera flash.
if you want more answers feel free to ask
Brian
[email protected]
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Forum Regular
Join Date: Jul 2003
Location: Toronto, Ontario
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Thank you SO MCUH !!!
thank you thank you !!!
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Powerbook 12" 1GHZ, 1.25GB of RAM
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Mac Enthusiast
Join Date: Feb 2004
Location: Vegas
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Just for a little clarification, for ISO you generally use a low # in good light situations (studio work, etc...) and high #'s for low light ones. The higher the number (in standard photography) the faster light is absorbed by the film. However, high ISO generally equals granier picture.
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Forum Regular
Join Date: May 2002
Location: Minneapolis, MN
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yea I didn't elaborate to much on that but I figured most people know what film speed is at least
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Quicksilver 867, 700mhz iBook, 1st Gen iPod, iSight, Newton 2100, and a 128k Mac. All operating and used on a constant Basis
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Also, check out photo.net - a great site with tons of information.
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We need less Democrats and Republicans, and more people that think for themselves.
infinite expanse
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Forum Regular
Join Date: Jan 2004
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This is a term that actually comes from the video side of the world. In it's simpliest form is that light is measured in degrees Kelvin. A ny day has a higher temp (around 5200 degrees kelvin or higher) a cloudy day has a lower temp around 3200 degrees. With the temperture change white looks diffrent (more orange under higer temps and more blue under lower temps) so you set a white balance to your scene you are shooting so white is the proper color (or lack there of technically) and all other colors are based off that white balance.
Cool! Do you mean white is picked up differently depending on the temperature or do you mean white actually looks different (to us) depending on the temperature?
Im guessing this could be due to the density of air which would fluctuate with temperature changes.
I know its off topic, it just seems interesting.
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Forum Regular
Join Date: May 2002
Location: Minneapolis, MN
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White under different degrees Kelvin does change but our eyes compensate for that change. You may notice that if you go from a inside room to the outdoors that you can notice a slight color change for a couple seconds as your eyes adjust. For me I work on Television crews and after running a handheld with my eye in the view finder for a couple hours when I stop everything will seem green for a few minutes as my brain readjusts to the normal lighting situation. The electronics don't know any better they just know that white is R=255, G=255, B=255. If the light is orange because of the lightwaves traveling through particulate in the air then the camera will see that white as orange unless you tell it otherwise. On high end cameras there is also something called Black Balance that resets Black values also
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Quicksilver 867, 700mhz iBook, 1st Gen iPod, iSight, Newton 2100, and a 128k Mac. All operating and used on a constant Basis
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