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Close-up Photography with Extension Tubes
Being of a "perfectionist" nature, I can see that only a dedicated macro lens will really make me happy. However, I'll probably try the extension tubes to use in situation where I can't/don't want to go the whole route with tripod, etc. Thanks, I look at extension tubes as much more versatile but more of a hassle to use. Also, they don't always get you as high a magnification as you need. They are also much easier to stow in a pocket of your bag than a large macro lens. I always have my 25mm ring with me. Well, "sort of" (get the magnification). The old formula of 1/FL = 1/u + 1/v works ("u" and "v" are lens-to-subject and lens-to-film). So, a 28mm lens with a 25mm extension ring will achieve almost 1:1 magnification (u/v = magnification). Using a 50mm lens would yield 1/2x and a 100mm yields 1/4x magnification. Since you mention you'd prefer to not haul a tripod, have you considered a set of close-up lenses instead ? Unless you use fast shutter speeds, the image will suffer from "camera shake" (due to the image magnification). Timmy |
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