AF-I lens
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AF-I NIKKOR Lens A NIKKOR lens with a built-in conventional rotor type autofocus drive motor. AF Lock Autofocus lock is typically used to hold focus on the part of the scene that's most important to you.
AF-I & AF-S lenses
Nikon's new series of AF lenses, involves the intergration of coreless motors into their super telephoto lenses. This gives these lenses quick, ultra quiet autofocus operations.
Nikon D100 with AF-I 400mm f/2.8 Nikkor + Nikon TC-20E converter
by Nikonian Victor Newman
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Top of Page AF-I (Nikon)
Lens with built-in autofocus drive motor. CPU is also built in. AF-I Nikkor lenses send information on distance to the camera body and are classified as D-type AF Nikkor lenses.
Top of Page AI (Nikon) ...
Auto Focus only for AF-S or AF-I lenses
Perhaps the biggest negative on the D40 is that it doesn't have an internal focus drive motor and hence no mechanical focus drive pin, ...
The modern Nikon made AI lenses are the AF-S Nikkor, AF-I Nikkor, AF Nikkor D and Nikkor AI-S types. The discontinued Nikkor AI and Nikon Series E lenses are also AI types.
Most AF Nikkors, except the AF-I and AF-S lenses, focus with a motor in the camera body.
Nikon TC-14E II 1.4x AF-S, AF-I Auto Focus Teleconverter ($405)
Reader Comments
Nikon TC-17E II (1.7x) Teleconverter AF-S ($398) ...
Of course, these same factors also make high quality Teleconverters more useful than ever, especially the Nikon AF-I and AF-S TCs. On a D1 the 80-200 and a 2x TC makes a 240-600f/5.6 lens! ...
sensor with 39 AF points including 9 cross-type points; Face Detection, ISO range 100-6400, expandable to 25,600; Dual SD memory card slots, SDXC supported; weather-proofed Magnesium-alloy body, built-in sensor cleaner, supports Nikon F, AF-S, AF-I, ...
 See also: Focus, AF, Camera, Lens, Image
  
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