“G” is a reference to a G-Type lens and is distinguishable from a standard D-Type lens by its lack of an aperture control ring. G-Type lenses relay distance information to compatible DSLRs like a D-Type lens but rely wholly on electronic aperture control through a camera body.

“DX” refers to lenses designed for cameras with a crop sensor format and is an abbreviation for “digital short back.”

This lens doesn’t have a built-in autofocus motor, which means it’s not fully compatible with Nikon DSLRs like the D40, D60, D3100/D3200, and D5100/D5200.