 BetterPhoto Member |
What aperture setting for a particular film A meter reading of important highlights and shadows on your model's face shows a range of f/16 to f/2. If you are using Kodacolor 100, an aperture of around f/5.6 would be the best choice. True or False A meter reading of important highlights and shadows shows a range of f/16 to f/2. With Kodachrome 64, shoot at f/2.8. True or False
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Christopher A. Vedros |
The correct answers to these questions might just depend on whether your teacher likes to overexpose or underexpose his film or slides. The best way to make sure you get answers correct on a test or homework assignment is to go to class and pay attention, or read the materials assigned to you. Having someone do your work for you won't make you a better photographer. Sorry if you think I'm being blunt, but I'm married to a 3rd generation teacher, and after a while, it rubs off. Chris A. Vedros
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Alan N. Marcus |
Hi Richard, The two types of film you are mentioning are Kodacolor, a color that yields a negative vs. Kodachrome 64 a slide film that yields a transparency. You are describing a portrait scene with a measured range of f/16 – f/2 i.e. 6 stops or 32:1. While you have stated the range you have omitted some key information. I would ask: You question assumes one would expose slide film differently. Assuming your desire is to render the skin tone as correctly as possible, the exposure would be: Fair skin subject – gray card or incident reading - averaging reflected reading - + one f/stop. For medium complexion + 1 1/2: For dark complexion - +2 stops. Caveat: A reflected spot (close-up) reading of human skin, generally results in rendering the human skin too dark by 1 f/stop. Color negative film exhibits a wide range of exposure latitude. That the range of exposure levels that will produce an acceptable image. For color negative film, exposure latitude is greater towards the overexposure direction. Color slide film has little exposure latitude in either direction. Alan Marcus
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Michael A. Bielat |
Without giving you the answer, the questions are actually quite simpler than they are being made out to be. Kodachrome 64 has an ISO of 64... and is less sensitivite to light. 1st concept = What effect does the ASA/ISO have over exposure? 2nd concept = meter readings. Now what if in question 1 you had set your aperture around the middle to f/5.6? What would the photo come out looking like? Would this setting expose the subject properly? In question 2, what would you think the photo would look like if you set your aperture to f/2.8? Would this expose the subject properly? Hope this helps and got you to understand things a little bit better...
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