Nick Castronuova Posted February 11, 2008 Share Posted February 11, 2008 Sorry guys, I know I ask some basic questions but here's another: How do you compensate for the changing f-stops when filming outdoors? Let's say that I am filming all day, and the F-stop changes from an f/11 to an f/8, do I just open up one stop? Thanks! Nick Link to comment Share on other sites More sharing options...
Premium Member Kevin Zanit Posted February 11, 2008 Premium Member Share Posted February 11, 2008 Well you would certainly want to maintain correct exposure, not underexpose something you are trying to match. I normally use ND when shooting outside, so I would pull ND from the lens rather then change the stop to maintain consistency in DOF. Now all this does not help match the changing light over the day. I usually try to shoot the wide shots together and then the closer coverage because its easier to match the lighting in closer shots. Sometimes you just have to use "brute force" to make things match: Link to comment Share on other sites More sharing options...
timHealy Posted February 11, 2008 Share Posted February 11, 2008 those aren't "brutes" ... hhehhehe best Tim Link to comment Share on other sites More sharing options...
chris marte Posted February 12, 2008 Share Posted February 12, 2008 Sorry guys, I know I ask some basic questions but here's another: How do you compensate for the changing f-stops when filming outdoors? Let's say that I am filming all day, and the F-stop changes from an f/11 to an f/8, do I just open up one stop? Thanks! Nick As long as the amount of light falling on the subject you're filming stays the same, there generally shouldn't be a reason for you to have lower f stop readings. Use a lighting setup that compensates the amount of light you've lost since the last scene you shot. For example, let's say a reading of f/ 11 gives you the equivalent of 800 footcandles (FC) of light. Since every subsequent stop going down (f/11, f/8, f 5.6, etc.,) lets in half as much light as the previous, f/ 8 would in that case give you the equivalent of 400 FC. To make up the 400 footcandles of light lost, there's some helpful mathematical calculations available on photography websites, or you can just play with your lights until your meter reads as it did before. Link to comment Share on other sites More sharing options...
chris marte Posted February 12, 2008 Share Posted February 12, 2008 As long as the amount of light falling on the subject you're filming stays the same, there generally shouldn't be a reason for you to have lower f stop readings. Use a lighting setup that compensates the amount of light you've lost since the last scene you shot. For example, let's say a reading of f/ 11 gives you the equivalent of 800 footcandles (FC) of light. Since every subsequent stop going down (f/11, f/8, f 5.6, etc.,) lets in half as much light as the previous, f/ 8 would in that case give you the equivalent of 400 FC. To make up the 400 footcandles of light lost, there's some helpful mathematical calculations available on photography websites, or you can just play with your lights until your meter reads as it did before. Link to comment Share on other sites More sharing options...
Premium Member Kevin Zanit Posted February 12, 2008 Premium Member Share Posted February 12, 2008 those aren't "brutes" ... hhehhehe best Tim Haha, Zing . . . Link to comment Share on other sites More sharing options...
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