374nA Lens f-numberThe f-number given in lens names is the maximum aperture of the lens.A Compatible Non-CPU LensesWhen using non-CPU lenses and accessories, select exposure mode g orh and set aperture using the lens aperture ring. In other modes, theshutter-release is disabled. Non-CPU lens data (0 212) can be used toenable many of the features available with CPU lenses, including colormatrix metering; if no data are provided, center-weighted metering willbe used in place of color matrix metering, while if the maximumaperture is not provided, the camera aperture display will show thenumber of stops from maximum aperture and the actual aperture valuemust be read off the lens aperture ring.D Incompatible Accessories and Non-CPU LensesThe following can NOT be used with the D800:• TC-16AS AF teleconverter• Non-AI lenses• Lenses that require the AU-1 focusingunit (400mm f/4.5, 600mm f/5.6,800mm f/8, 1200mm f/11)• Fisheye (6mm f/5.6, 7.5mm f/5.6,8mm f/8, OP 10mm f/5.6)• 2.1cm f/4• Extension Ring K2• 180–600mm f/8 ED (serial numbers174041–174180)• 360–1200mm f/11 ED (serial numbers174031–174127)• 200–600mm f/9.5 (serial numbers280001–300490)• AF lenses for the F3AF (AF 80mmf/2.8, AF 200mm f/3.5 ED,AF Teleconverter TC-16)• PC 28mm f/4 (serial number 180900or earlier)• PC 35mm f/2.8 (serial numbers851001–906200)• PC 35mm f/3.5 (old type)• Reflex 1000mm f/6.3 (old type)• Reflex 1000mm f/11 (serial numbers142361–143000)• Reflex 2000mm f/11 (serial numbers200111–200310)