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12/23/2005 03:56:57 PM · #1 |
| could someone exlpain ISO and what is does... I have a cannon powershot 300 A. My ISO choices are 50, 100, 200, 400 what is the difference what is it used for? |
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12/23/2005 03:58:41 PM · #2 |
Originally posted by jamfz:
could someone exlpain ISO and what is does... I have a cannon powershot 300 A. My ISO choices are 50, 100, 200, 400 what is the difference what is it used for? |
the higher the number, typically for the lower light you are in.
your cam has automatic ISO, leave it there.
the disadvantage of the high ISO (400) over 50 or 100, is that 400 iso appears more 'noisy' (or as in film terms, grainy)
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12/23/2005 04:00:36 PM · #3 |
| Thanks for the help i really was not sure what it was i always left it on auto. |
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12/23/2005 04:18:17 PM · #4 |
ISO comes from the days of film cameras
Different film speeds allowed you to shoot in different lighting conditions.
The way iso works is its the amount of light processed by the ccd (eyes of the camera) in low lighting the higher the iso the better but you will get lots of digital noise. Some of my pictures during dark days I may shoot upwords of 1600 iso but not to fear there are noise reduction programs out there. Still wont make them perfect but you dont have to worry too much about it :)
I hope this helps |
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