A little help with what everything means in a lens name

[bandapear]

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.

 

[rendition]

http://imaging.nikon.com/products/imaging/lineup/lens/glossary.htm

 

[Octarine]

http://imaging.nikon.com/products/imaging/lineup/lens/glossary.htm

That's too obvious, right Or are we expecting too much from homo interretiatus? (Source)

 

[nightwolf75]

wonder why do we even bother to sticky something when no one reads... sigh...

http://www.clubsnap.com/forums/showthread.php?t=411772

 

[jgjonathangoh]

wonder why do we even bother to sticky something when no one reads... sigh...

http://www.clubsnap.com/forums/showthread.php?t=411772

I read!! i have referred to it a few times already..

 

[rendition]

Because the word ignorant exists in the dictionary.

 

[Rashkae]

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]

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)

 

[frankchn]

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]

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.