multiple exposure

[Skyeg]

how to multiple exposures work? when u expose a frame more then once what do you have to take into account?

 

[Skyeg]

oops i put this in the wronge place, is ther ea way to move it?

 

[drlynn]

When you're gonna do multiple exposures, you have to take into account the total amount of light needed to make a "proper exposure."

For example, say your meter tells you that a proper exposure for a certain scene is 1/500 at f/8. The total exposure for the frame shouldn't exceed this, or your photo will be overexposed. so for a double exposure, you'd need to set your camera to 1/1000 at f/8 and shoot twice.

It helps to think of a frame of film as a bucket and light as water. Each frame will only "hold" so much light. This is why it is SO important to have a good grasp of how film speed, f/stop and shutterspeed interrelate to make an exposure.

/edit to recommend a book by Bryan Peterson called Understanding Exposure. He does a great job of explaining the whole concept of the realtionship of shutterspeed, f/stop and film speed. His approach is very readable and easy to understand.

 

[markc]

/edit to recommend a book by Bryan Peterson called Understanding Exposure. He does a great job of explaining the whole concept of the realtionship of shutterspeed, f/stop and film speed. His approach is very readable and easy to understand.

I'll second that. I think all his books have good stuff in them.

 

[drlynn]

He actually teaches a couple of classes online. I think the place is betterphoto.com or something close. I have it bookmarked at home. I'd really like to take the one based on Understanding Exposure if I can find the time and $$.