What is the Automatic Indexing (AI) of Nikkor lenses, and how does it work?
Im going back on 20 years here, but Im curious. AI and AI-S featured Lenses for Nikon – What does it mean? PS now the proud owner of a FM2N. Yay!
Automatic indexing, or AI, the camera meter to measure exposure through the lens at maximum aperture. (so you can focus and compose with a bright viewfinder) So when you release the shutter button, the camera stops the lens down to the selected aperture. "S" in the AI-s allowed for Program AE Exposure Mode, among other [more complex] applications – mostly with masking linearity. Besides this, there is no difference between either an AI or AI-S lenses. If you use a camera without program mode, as a Nikon Fe2 (and your FM2n), there is no difference – but it must be an AI lens. (otherwise, you have to use stop down metering)
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Fotodiox Nikon F Lens to Canon EOS Camera Mount Adapter for Canon EOS 1d,1ds,Mark II, III, 5D, 5D Mark II, 10d, 20D, 30D, 40D, 50D, Rebel x1i, xt, xti, xs, xsi 300D, 350D, 400D, 450D, 500D, 1000D $19.95 If you have a SLR or DSLR camera and other maker/mount lenses, the Fotodiox Mount Adapters allow you to use your lenses on the film/digital camera body. Sharing lenses has some distinct advantages. Certain prime lens just cant be replaced, and you save cost of purchase lenses. Fotodiox offers a range of adapter from large format to smaller format digital adapters. Adapting larger format lens, … |
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Fotodiox Pro Adapter –Leica R Lens – Canon EOS Camera Adapter for Canon 1d, 1ds, Mark II, III, 5D, 5D Mark II, 10D, 20D, 30D, 40D, 50D, Digital Rebel xt, xti, xs, xsi, x1i, 300D, 350D, 400D, 450D, 500D, 1000D $79.95 This is one of the Pro-series lens mount adapter made with precision and pristine award standard. As all Pro-series adapters, these adapters have been specially crafted to endure professional lenses. No “play” between lens and Camera. With unique styling, the lens mount adapter maintains/enhances professional appearance. This lens mount adapter allows Leica R lens to fit on Canon EOS camera body…. |
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