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Thread: Lens definition

  1. #1

    Default Lens definition

    AF 70-300mm f/4-5.6G ---> what is the 'G' means?
    AF 70-300mm f/4-5.6D ED---> what is the 'D' and 'ED' mean?
    AF 28-105mm f/3.5-4.5D IF--->'D' and 'IF' ?
    AF-S 80-200mm f/2.8 IF-ED---> 'IF-ED'??

    Thanks.

  2. #2
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    Default Re: Lens definition

    AF 70-300mm f/4-5.6G ---> what is the 'G' means?
    AF 70-300mm f/4-5.6D ED---> what is the 'D' and 'ED' mean?
    AF 28-105mm f/3.5-4.5D IF--->'D' and 'IF' ?
    AF-S 80-200mm f/2.8 IF-ED---> 'IF-ED'??

    AF - auto focus
    S - silent wave motor = silent and fast focus
    G - lens with no apeture ring
    D - lens with apeture ring
    ED - extra low dispersion glass
    IF - internal focus = u turn the focus ring, but the length of the lens barrel doesnt grow longer and the lens front doesnt rotate
    VR - vibration reduction
    basically something like that...did i make any error?

  3. #3

    Default Re: Lens definition

    G - lens with no apeture ring --> what is apeture ring?

    ED - extra low dispersion glass --> is it more durable?

  4. #4
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    Default Re: Lens definition

    Quote Originally Posted by hirowen
    G - lens with no apeture ring --> what is apeture ring?

    ED - extra low dispersion glass --> is it more durable?
    apeture ring - for example, on ur d50 kit lens, there is only one ring for u to turn to zoom in and out rite? and if u wan to change ur apeture lets say from f3.5 to f8, u gota turn the command dial on ur d50 camera rite?
    but some lenses have a apeture ring on the lens for u to change the apeture by turning a ring on the lens (besides the zoom ring), and dun need to use the camera body..
    taken from Nikon Singapore website, u can see 2 rings on the 2nd pic for the 80-200mm lens rite?

    extra low dispersion glass - not say more durable, but it helps to reduce chromatic abberation a lot.. those thing like purple fringing..
    Last edited by kcuf2; 8th April 2006 at 08:56 PM.

  5. #5

    Default Re: Lens definition

    Oic! Thanks a lot!

  6. #6

    Default Re: Lens definition

    basically..the more letters u see.. the more expensive it gets...
    if my camera is there at the right moment, click, all I have to do is accept it.
    -edouard boubat

  7. #7
    Senior Member zac08's Avatar
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    Default Re: Lens definition

    Quote Originally Posted by kcuf2
    AF 70-300mm f/4-5.6G ---> what is the 'G' means?
    AF 70-300mm f/4-5.6D ED---> what is the 'D' and 'ED' mean?
    AF 28-105mm f/3.5-4.5D IF--->'D' and 'IF' ?
    AF-S 80-200mm f/2.8 IF-ED---> 'IF-ED'??

    D - lens with apeture ring - only this one...

    basically something like that...did i make any error?
    D lens is meant for allowing the computation of distance for flash usage.


    Cheers,
    Michael Lim
    My Flickr Site

  8. #8
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    Default Re: Lens definition


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