User manual POLAROID MP4 PHOTOMACROGRAPHY

[. . . ] Table C: Decide which lens f-stop you wish to use. Find the number that corresponds to that f-stop. Table D: Add the numbers you get from Tables A, B, and C. [. . . ] 6** 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15** 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40** 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 ½ min. ** 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 min. ** *Filtration will be necessary for Polacolor films. See the current film instructions for specific details. **Includes compensation for low light-level reciprocity failure. This compensation is an average for Polaroid instant films in general, and thus a rough guide only. Note that color films will require filtration in addition to a longer exposure. Table B Reproduction Scale 1:10 to 1:5 . . . . . . . . . . . . . . . 8 Measure the length of the original and its length on the ground glass to determine the reproduction scale. For information or technical assistance: From within the U. S. , call toll-free 1-800-343-5000, Monday-Friday, 8 AM to 8 PM (Eastern Time). If outside the U. S. , contact the nearest Polaroid office. Table C Lens Aperture f/4. 5 . . . . . . . . . . . . . . . . . . . . . . . 6 When setting the lens between two f-stops, use half numbers. Thus, for f/11-f/16 use 3½. 1 This is intended as a guide, not a precise exposure indicator. You may have to compensate for unpredictable variables which affect exposure, such as brightness of window or room lighting, differences in color or contrast of the subject material, voltage fluctuations, or the age of the lamps. Selecting the right lens for photomacrography The table below shows the range of magnifications you can achieve with each of the MP-4 lenses. Note that you have several lens options for achieving various magnifications. For example, to enlarge an object five times, you can use a 75mm lens with two macro extensions, a 50mm lens with one macro extension, or a 35mm lens by itself. If you have a choice between two or more lenses, always use the lens with the longer focal length. The longer the focal length, the more space you have between the subject and the lens. [. . . ] Then move the camera head up or down (or use a focusing stage) for sharp focus. The bellows extension determines magnification. To increase image size, increase the bellows extension and reduce the lens-to-subject distance. [. . . ]