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Nikkor lens - difference in D and G

Kanwar Bajwa , May 16, 2011; 06:24 p.m.

Nikon lens names have D or G at the end. What does D and G denote. Also what is difference in AF-S and only AF.
I am trying to understand difference between AF-S NIKKOR 50mm f/1.8G and AF 50mm f/1.8D
Could someone help me become less dumber???

Responses


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Don Cooper , May 16, 2011; 06:31 p.m.

Lenses with the 'G' designation don't have an aperture ring. Aperture has to be set through the camera. AFS lenses have the focusing motor built into the lens. Usually much quieter and faster focusing than regular AF lenses that have the focusing motor in the body and mechanically focus the lens. AFS lenses will not autofocus on AF only bodies. Bodies that are AFS only will not autofocus with regular AF lenses.

Richard Sperry , May 16, 2011; 06:35 p.m.

One difference is you have manual aperture on the D. And none on the G; the aperture is set via camera.

Shun Cheung , May 16, 2011; 06:38 p.m.

AFS lenses will not autofocus on AF only bodies.

Only a few Nikon AF film bodies fall into that category; most of them are from the few years before and after 1990, such as the N8008/F801. All Nikon digital SLRs can auto focus with AF-S lenses.

Bodies that are AFS only will not autofocus with regular AF lenses.

Some of the recent lower-end DSLRs fall into that category, from the D40 to the current D3100 and D5100. Given that pretty much all new AF lenses are AF-S, this is not a major issue. However, some of the current Tokina lenses are not of the AF-S type, such as the 11-16mm/f2.8 Tokina, etc.

Peter Hamm , May 16, 2011; 06:48 p.m.

As far as those two lenses are concerned, though, yes, the "D" won't focus on D40/40X/60/3000/3100/5000/5100 (although it will meter)... but also...

The "G" lens has a totally new optical formula. Nikon claims better bokeh (and better CA control perhaps), but the jury is out on that. It's probably going to be better. Normally "new" formulations of lenses these days are better than those they replace... What camera(s) will you use this lens on?

Peter Hamm , May 16, 2011; 06:49 p.m.

Also, I am pretty sure that all "G" lenses are AF-S, but most "D" lenses are not.

And, btw, you are NOT dumb. It's very confusing.

Ilkka Nissila , May 16, 2011; 07:00 p.m.

The 10.5mm Fisheye is not AF-S but it's G. There's always an exception :-)

Richard Snow , May 16, 2011; 07:05 p.m.

Also, I am pretty sure that all "G" lenses are AF-S

Most are, but not all...I can think of 2, (the 10.5mm DX Fisheye and 70-300mm ED-IF non-VR), that are G lenses, but not AF-S.

Either way...

"D" lenses are of an older lens design and they transmit Distance information to the camera's metering system.

"G" lenses are Gelded, which means that they do not have an aperture ring and the aperture must be controlled by the camera.

or, From NikonUSA:

D: Distance
D-type AF-Nikkor lenses relay subject-to-camera distance information to Nikon SLR cameras that feature 3D Color Matrix Metering, 3D Matrix Metering, and 3D Multi-Sensor Balanced Fill-Flash.

G: The lens has no aperture control ring and is designed to be used with cameras that allow setting the aperture from the camera body. G lenses also provide Distance information to the camera.

Hope this helps,
RS

Shun Cheung , May 16, 2011; 07:07 p.m.

There are a few G lenses that are not AF-S. The 10.5mm/f2.8 DX fisheye is one, and I own one. In fact, that is the only Nikon DX lens that is not AF-S. Also the "cheap" 70-300mm/f4-5.6 G lens is not AF-S; that lens is typically sold for less than $150 new and has a plastic mount. (Note that it is a 70-300 from f4 on the 70mm end. The AF-S VR version is f4.5 at 70mm and a lot more expensive.)

Peter Hamm , May 16, 2011; 07:10 p.m.

Uh oh... are we giving information overload? Did we help, Kanwar? Please let us know? Here at photo.net, if you ask us what time it is, we love to give you a treatise on the history of clockmaking and timepieces...


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