What do the letters G, ED, IF and VR stand for?

NPhoto - - Over To You… - Roy Mar­shall, Bris­tol, UK

Chris says… The ab­bre­vi­a­tions on lenses seem like gob­bledy­gook, but they are im­por­tant for help­ing you dis­tin­guish one lens from the next. Here are some of the most com­mon:

AF-S An aut­o­fo­cus (AF) lens with a silent-wave mo­tor built into it. It en­sures full AF on all Nikon D-SLRs.

D Type of aut­o­fo­cus lens in­tro­duced to re­lay dis­tance in­for­ma­tion from the lens to the cam­era body to im­prove ex­po­sure me­ter­ing. The G-type lenses also do this.

ED Ex­tra-low Dis­per­sion. Uses spe­cial glass to min­imise colour fring­ing.

G Nikon lens that lacks an aper­ture ring (aper­ture is ad­justed by con­trols on the cam­era it­self).

IF in­ter­nal fo­cus­ing. The lens can fo­cus with­out the length of the lens chang­ing.

VR Vi­bra­tion re­duc­tion. Sys­tem built into the lens de­signed to com­pen­sate for cam­era shake.

Ever won­dered what all those ab­bre­vi­a­tions mean?

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