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jcw122
08-22-2005, 02:21 PM
What exactly do the G and D in AF-G and AF-D for Nikon cameras stand for? Are these definitions for Nikon's alone? Which is better?

Just trying to understand stuff, thx.

jcw122
08-22-2005, 04:00 PM
Well after a little reading through a randomish thread here at the forum, it appears the AF-D's are pro glass, and the AF-G's are Consumer glass.

erichlund
08-23-2005, 12:05 PM
What exactly do the G and D in AF-G and AF-D for Nikon cameras stand for? Are these definitions for Nikon's alone? Which is better?

Just trying to understand stuff, thx.
Here's a link to all that Nikon lens jargon: Lens Terminology (http://www.kenrockwell.com/nikon/nikortek.htm)

D lenses give distance information. G lenses give distance information but also have no aperture ring, so they only work on cameras that can set the aperture. AF just means auto-focus. In effect, D lenses are a little more flexible in that they can be used on any F mount Nikon camera. G lenses cannot be used on many older cameras. However, the D and G have no inherent relationship to the quality of the lens.

Cheers,
Eric

jcw122
08-23-2005, 02:36 PM
Here's a link to all that Nikon lens jargon: Lens Terminology (http://www.kenrockwell.com/nikon/nikortek.htm)

D lenses give distance information. G lenses give distance information but also have no aperture ring, so they only work on cameras that can set the aperture. AF just means auto-focus. In effect, D lenses are a little more flexible in that they can be used on any F mount Nikon camera. G lenses cannot be used on many older cameras. However, the D and G have no inherent relationship to the quality of the lens.

Cheers,
Eric

Thx very much for the info eric, that helped alot!

F3HP_2_the_grave
09-14-2005, 06:46 AM
Lens Acronyms

Nikon Lenses have designated acronyms used in their names (for example, the lens AF-S 18-70mm f/3.5-4.5G DX ED IF). These help consumers know what features the lens has. Some common designations are listed below with the descriptions of each.

AF - Auto focus.

AF-S - Auto focus-Silent. Uses SWM, Sonic Wave Motor, to focus quietly and faster; similar as Canon's USM, Ultrasonic Motor technology.

ED - Extra-low Dispersion glass. Reduces chromatic aberration.

IF - Internal Focus. Focussing moves only internal lenses, meaning that the lens does not change in length during focussing.

DX - Lens designed for Nikon's DX format sensors; the image circle is reduced in size by 1.5 to fit the smaller sensor in Nikon's digital SLRs. A circular image is produced if used with a 35mm camera.

VR - Vibration Reduction. Uses special VR lens unit to reduce camera shake evident in photographs. Some VR lenses also support panning shot mode, detecting the horizontal movement of the lens and minimizing the vertical vibration. Equivalent to Canon's IS (Image Stabilizer) and Minolta's AS (Anti-shake, although this is embedded into the body of the camera).

D - Distance/Dimension. Indicated after the f-stop number. It means that the lens is capable using of Nikon's RGB Matrix Metering. The lens carries the information of the distance between the camera and the subject.

G - Indicated after the f-number, and tells that the lens does not have an aperture ring, but instead that aperture value is controlled by the body. Since the body needs to control the lens aperture, these type lenses only work with automatic bodies. It has the same characteristics with the D lens.

Micro - Indicates that the lens is capable of photomacrography - photographing small subjects at short distances.