
What is Automatic Indexing (AI) on Nikkor lenses and how does it work?
Im going back about 20years here, but Im curious. AI and AI-S featured lenses for Nikon – what does that mean? PS now the proud owner of an FM2N. Yay!
Automatic indexing, or AI, allows the camera’s meter to measure exposure through the lens, at its maximum aperture. (so that you can focus and compose with a bright viewfinder) Then when you release the shutter, the camera stops the lens down to the selected aperture. The “s” in AI-s allowed for Program AE exposure mode, among other [more complicated] uses – mostly with aperture linearity. Beyond that, there is no difference between either an AI or AI-s lens. If you are using a camera without program mode, like 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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Nikon Nikkor 24mm f/2.0 AI-S Lens
$279.00 |
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NIKON 55mm f2.8 MACRO/MICRO-NIKKOR: Version 2 (AIS)
$150.00 |
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Nikon 28mm f/2.8 AIS MF Wide Angle Nikkor Lens
$202.50 |
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Nikon 35mm f/1.4 AIS MF Wide Angle Nikkor Lens 1.4
$620.00 |
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Nikon AF Nikkor 35-70mm 1: 3.3 - 4.5 AI-s Zoom * Ex.
$65.00 |
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Nikon Nikkor 35-135mm 3.5 AIs lens With MACRO FM3 F3 FA
$79.50 |
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Nikon Nikkor 24mm 2 AIS FAST lens *CRC* design **READ**
$73.00 |
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Nikon AIS 35mm F1.4 Nikkor AI-S Manual Lens
$182.50 |
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55mm 2.8 Macro Nikkor Nikon AIS with 2-PK-13 Tubes MINT
$125.00 |
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Nikon Nikkor 50mm f1.4 f/1.4 AIs Beauty 695u
$144.00 |
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Nikon Nikkor 28mm f2.8 f/2.8 AIs 653u
$249.00 |
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NIKON AI-S NIKKOR 50mm f/1.2 Brand New
$694.00 |
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Lens Hood F Nikon HN-1 NIKKOR 24mm f/2.8 28mm f/2 AI-S
$13.45 |
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NIKON AI-S NIKKOR 24mm f/2.8 Brand New
$578.00 |
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NIKON AI-S NIKKOR 35mm f/1.4 Brand New
$1,048.00 |
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NIKON AI-S MICRO NIKKOR 55mm f/2.8 Brand New
$548.00 |
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NIKON AI-S NIKKOR 28mm f/2.8 Brand New
$598.00 |
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NIKON AI-S NIKKOR 20mm f/2.8 Brand New
$938.00 |
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NIKON AI-S NIKKOR 50mm f/1.4 Brand New
$528.00 |
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Nikon Nikkor 50mm f/1.4 MF AIS Lens Exc Cond
$79.00 |
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Nikon Nikkor AiS Ai-S 50mm F1.4 F/1.4 Lens D5000 D90
$289.00 |
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Nikon Nikkor AiS Ai-S 105mm F2.8 F/2.8 Micro Makro Lens
$409.00 |
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Nikon 15mm Lens nikon NIKKOR 15mm AIS LENS
$1,179.99 |
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Nikkor 50mm f1.4 Nikkor: Version 10 (final MF AIS)
$398.72 |
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Nikon Nikkor 35-70mm f3.5 f/3.5 AIS Zoom 512u
$99.00 |
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Nikon Nikkor Ai-S Ais MICRO MF 105mm F2.8 28/2.8 Lens++
$305.05 |
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Nikon 24mm AI-S Nikkor lens Excellent Condition
$53.00 |
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Nikon Micro Nikkor MF 55mm 2.8 Ai-s Lens 55 NR 112836
$39.00 |
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NEW Nikon NIKKOR 50mm f/1.2 AIS Manual Focus Lens
$599.95 |
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NEW Nikon NIKKOR 50mm f/1.2 AIS Manual Focus Lens
$599.95 |
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Nikon Nikkor 20mm f/3.5 AI-s
$91.00 |
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Nikon AIS Nikkor 50mm F1.8 (Pancake) - Ex+++
$75.00 |
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Nikon Nikkor 50mm 1.2 Ais
$420.00 |
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NIKON AF NIKKOR 35-70mm 3.3/4.5 AIS ZOOM LENS & Macro
$23.47 |
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NIKON NIKKOR ED 180mm F/2.8 AIS FUGLY PRESS LENS Tele
$54.77 |
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NIKON NIKKOR AIS 50mm f1.4 CAMERA LENS WITH CAPS
$139.95 |
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NIKON/NIKKOR 35-105MM F3.5, ZOOM AIS, BLACK, EX+ CNDTN
$59.95 |
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NIKON NIKKOR 2OMM F2.8 AIS-EX+TO MINT-WIDE&SHARP-W/CAPS
$379.95 |
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NIKON/NIKKOR 36-72MM "E" F3.5-EX+CNDTN-AIS MOUNT-W/CAPS
$59.95 |
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NIKON/NIKKOR 100MM F2.8 SERIES E-AIS MOUNT - EX CNDTN
$59.95 |
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Nikon Zoom-NIKKOR 35-105mm AIS MF lens
$16.05 |
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Nikkor 28mm f/2.8 AIS Mint Condition
$100.00 |
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BEAUTIFUL 55MM F2.8 AIS MICRO-NIKKOR FOR DIGITAL & FILM
$0.99 |
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NIKON AI-S NIKKOR 28mm f/2.8 Exc+
$298.00 |
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Nikon Nikkor *ED 180mm/f2.8 MF Ais lens, 180/2.8
$297.00 |
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Nikon Nikkor AIS 50mm F1.4 -EX+++
$175.00 |
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@Mint@ Nikon Nikkor AIS 50mm/f1.4 MF, 50/1.4 #003705
$269.10 |
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Lens Hood For Nikkor 5mm f/1.4 AI-S 35mm f/2 f/2.8 HN-3
$13.45 |
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Nikon Nikkor 20mm f3.5 AIS Ultra Wide Angle Lens
$122.50 |
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+++ Nikon Nikkor Ai-S Ais MF 28mm F2.8 28/2.8 Lens +++
$127.50 |
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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 Nikon F Lens - Olympus 4/3 Mount Camera Adapter for EE-30, E-3, E-400, E-410, E420, E450,E-510, E-520,E-620, Panasonic DMC-L10,
$22.95 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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