7 straight blades.
Stops down to f/32.
Aperture Ring top
Close Focus top
Working Distance top
9.5″ (240mm), measured at 1:2.
(The working distance for the 105mm f/4 is 11″ or 280mm)
Maximum Reproduction Ratio top
With the PN-11 extension tube, 1:0.88 (1.14x life-size).
PN-11 Auto Extension Tube top
52.5mm flange-to-flange length.
2.8″ (70.5mm) diameter by 2.7″ (67mm) overall length.
Rated 8.6 oz. (245g).
Nikon part number 2647.
Takes BF-1A body cap and LF-1 rear cap.
Optional #61 pouch.
Focus Lock top
A small chrome set screw on the focus scale at about the 2 feet (0.6m) position allows one to increase focus drag to prevent accidental knocking in laboratory setups.
It doesn’t actually “lock” the focus; it merely makes it stick harder so it’s less likely to get knocked.
Hard Infinity Focus Stop? top
This is great for astronomy; just turn to the stop and you have fixed laboratory-perfect focus all night.
Focus Scale top
Depth-of-Field Scale top
Yes, but limited.
Infra-Red Focus Index top
Yes: red dot in depth-of-field scale.
Filter Thread top
Does not rotate.
Optional AF-1 gelatine filter holder.
Tripod Collar top
None on lens.
Rotating tripod collar on optional PN-11 extension ring with 90º click stops and locking screw.
Nikon specifies 3.3″ (83.5mm) extension from flange (3.6″ or 91.5mm overall length) by 2.36″ (66.5mm) diameter.
17.972 oz. (509.55g), measured.
Nikon specifies 18.2 oz. (515g).