A little help with what everything means in a lens name


Status
Not open for further replies.

bandapear

New Member
May 25, 2009
4
0
0
32
#1
For example, "AF-S DX Zoom-Nikkor 18-135mm f/3.5-5.6G IF-ED"

I know what the basics like 18-135 mm. I know the f/3.5-5.6 (or at least I think I do). But the big things:

What does the G stand for being the f-stop

What does the "IF-ED" mean?

What does the "AF-S" mean?

Any info on this stuff, or even if you can direct me to some resource that shows me all this stuff; (anytime I try googling any of these terms I just get sites with reviews or selling lenses with those aspects.)

Thanks in advances guys.
 

Rashkae

Senior Member
Nov 28, 2005
19,105
12
0
#7
Because common sense is a rare commodity. It would make sense to read the manual, check the nikon website, google or search on the forums...
 

scenar

New Member
Aug 23, 2005
1,246
0
0
#8
For example, "AF-S DX Zoom-Nikkor 18-135mm f/3.5-5.6G IF-ED"

I know what the basics like 18-135 mm. I know the f/3.5-5.6 (or at least I think I do). But the big things:

What does the G stand for being the f-stop

What does the "IF-ED" mean?

What does the "AF-S" mean?

Any info on this stuff, or even if you can direct me to some resource that shows me all this stuff; (anytime I try googling any of these terms I just get sites with reviews or selling lenses with those aspects.)

Thanks in advances guys.
G - means no aperture ring (unlike 'D' lenses)
IF - Internal Focusing (length of lens does not change as focusing distance changes)
ED - Extra Low dispersion glass => basically some specially produced glass to improve image quality
AF-S - silent wave motor - quicker/more silent focusing using an in-built motor within the lens (compared with AF-D, which focuses the lens by relying on a screw-driven motor in the camera body)
 

Last edited:

frankchn

New Member
Dec 8, 2008
297
0
0
#9
AF-S - silent wave motor - quicker/more silent focusing using an in-built motor within the lens (compared with AF-D, which focuses the lens by relying on a screw-driven motor in the camera body)
I think AF-S actually means that the autofocus motor is contained within the lens, not the camera body - that's all. For example the 18-55mm DX kit lens also has the AF-S designation but I think it is driven by a micromotor or something like that and doesn't have full-time manual focusing.
 

calebk

Senior Member
Jul 25, 2006
10,594
0
0
Clementi
#10
I think AF-S actually means that the autofocus motor is contained within the lens, not the camera body - that's all. For example the 18-55mm DX kit lens also has the AF-S designation but I think it is driven by a micromotor or something like that and doesn't have full-time manual focusing.
SWM has a few variants too, just like how USM has Ring USM, Ring USM II, Micro USM and so on.
 

Status
Not open for further replies.
Top Bottom