Compatibility  Everything works perfectly on every digital Nikon, both FX and DX.  It's also perfect on decent or recent AF film cameras like the F6, F100, F5, N80 andN75.    Optics  14 elements in 12 groups.  One ED element. and one with Nano-Crystal Coat.  Internal focusing: nothing moves outside.  It's got Nikon's SIC Super Integrated multiCoating.    Diaphragm  9 rounded blades.  Stops down to f/32 at infinity, f/57 at 1:1.  The previous 105mm AF Micro has only 7 straight blades.    Close Focus Ratio  1 foot (0.314m). 1:1    Weight  26.515 oz. (751.7g), measured, Japan version, 2008.  Nikon specifies 27.9 oz. (790g).