what does 1/10s mean?
- Thread starter Nestor
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thats how long the shutter stays open during a shot. if you are getting 1.5", 1" means the shutter opens for 1.5sec and 1sec respectively. when you see just 10 without the "(10)
it means shutter opens for 1/10 seconds... think of light as water, aperture as opening, and ISO as flow rate.
say your setting is ISO200 at f2.8, 1/5s....so in order to decrease the aperture opening time, you can either open the aperture wider or increase the flow rate. since 2.8 is already the widest opening, that leaves you the choice of increasing the ISO. from 200 to 400 you have doubled the ISO, so now the shutter will open for 1/2 the time of 1/5 which gives you 1/10 seconds.
think of filling a pail w water considering ISO(flow rate), aperture( f2.8, f4 etc) and shutter speed( how long to saty open)...changing either of this will affect the other....
bernardy4416
New Member
Hi Nestor,
agree with Galdor that getting the correct exposure is a basic concept in photography.
Yes, it can be confusing at first, but it soon becomes second nature if you figure the pattern out.
Get a good basic photography book to go through the steps. Try one of John Hedgecoe's......I used some of them when I first started photography and he's rather good at explaining things.
Basically it boils down to the concept of "stops". Shutter speed and aperture can be thought of as "stops". For any given meter reading (the correct amount of light to allow to hit the film/CCD), you can choose to adjust any of the 2 components to keep the amount of light entering the camera constant. Failing which, you can choose to compensate by making the film/CCD more "sensitive" to light in a dark environment by using a fast film (high ISO number, requires less light for a said exposure), or less "sensitive" to light in a bright environment by using a slow film (low ISO number, requires more light for a said exposure).
The catch is figuring out the numbering system for the "stops". Fortunately, this is quite a graceful system (check out the aperture markings on your lens, as well as the exposure times for your shutter reading). Notice the "doubling" pattern? The same goes for ISO.
I'm sorry I can't be more helpful, but I was never eloquent with words. I hope this helps more than it confuses....
But do try reading an introductory book on photography.....happy shooting
Bernard
agree with Galdor that getting the correct exposure is a basic concept in photography.
Yes, it can be confusing at first, but it soon becomes second nature if you figure the pattern out.
Get a good basic photography book to go through the steps. Try one of John Hedgecoe's......I used some of them when I first started photography and he's rather good at explaining things.
Basically it boils down to the concept of "stops". Shutter speed and aperture can be thought of as "stops". For any given meter reading (the correct amount of light to allow to hit the film/CCD), you can choose to adjust any of the 2 components to keep the amount of light entering the camera constant. Failing which, you can choose to compensate by making the film/CCD more "sensitive" to light in a dark environment by using a fast film (high ISO number, requires less light for a said exposure), or less "sensitive" to light in a bright environment by using a slow film (low ISO number, requires more light for a said exposure).
The catch is figuring out the numbering system for the "stops". Fortunately, this is quite a graceful system (check out the aperture markings on your lens, as well as the exposure times for your shutter reading). Notice the "doubling" pattern? The same goes for ISO.
I'm sorry I can't be more helpful, but I was never eloquent with words. I hope this helps more than it confuses....
But do try reading an introductory book on photography.....happy shooting
Bernard
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