Lens definition


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hirowen

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#1
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.
 

kcuf2

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Dec 29, 2005
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#2
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?
 

kcuf2

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#4
hirowen said:
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..
 

Patryk

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Mar 8, 2004
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#6
basically..the more letters u see.. the more expensive it gets... :sticktong
 

zac08

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Feb 21, 2005
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#7
kcuf2 said:
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,
 

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