 BetterPhoto Member |
Meaning of +1 In the workshop on photographing snow the phrase "+1" was used. I need to make sure I understand what that means. If I'm using ASA 200 film and my the 400 film setting is set at the +1 spot does that mean to make a +1 shot I need to set the ASA on 400? Thanks. Am looking forward to the workshop for manual cameras.
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Jeff S. Kennedy |
Actually Cathy, its just the opposite. +1 indicates you are adding 1 stop of exposure. One stop of exposure is twice as much light. Using ISO 200 as the base in this example, ISO 400 film requires half the light. ISO 100 requires twice the amount of light to get the correct exposure. Therefore to fool your camera into adding a stop of exposure you have to tell it that the film you are using is ISO 100. Does that make sense?
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BetterPhoto Member |
Yes Jeff that does make since the way you explained it but what I guess I don't understand then is how to use the +1 and the -1 that are on my camera. If I set the film speed correctly at 200 then what sits on the +1 is 400 and what sits on the -1 is 100. I think I just don't understand how to use the +1 and -1 settings. If you can help with that, that would be great! Thanks.
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Jeff S. Kennedy |
Again Cathy you've got it backwards. Setting the exposure compensation to +1 would be the same as adjusting your ISO to 100. Conversely, setting it to -1 would equal ISO 400. You can also think about it as +1 the camera is going to open up a stop of exposure (adding one stop) and vice versa. Hope that helps.
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