afnikkor-85mm-f18d
The optical construction of the lens consists of 6 elements in 6 groups - conventional optical design with no special optical elements incorporated. The build quality of the lens is decent, but not exceptional - the barrel is made out of plastic and by no means comes even close to the quality sported by some high finish lenses from Leica and Carl Zeiss. Still, the lens does not feel flimsy at all and there is no wobbling inside or out. This can be partially attributed to the fact that the lens implement rear focusing optical design, so the lens cams do not extend during focusing, keeping the overall length of the lens constant. And at 72 x 59mm (2.3 x 3.8in) and 380g (13.2oz), the lens is compact and light for a telephoto prime.
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[/caption]Like all AF-D designated lenses, AF Nikkor 85mm f/1.8D does not have a dedicated focusing motor. The lens still supports auto-focusing as long as your camera has a drive screw, which locks in to a slot on the base of the mount & rotates the lens to move it in to focus. Fortunately for the owners of entry level cameras like D40/D40x, which don't have a focusing screw driver, as well as those of you who don't require to rely on camera electronics to control the lens, AF Nikkor 85mm f/1.8D will still let you manual focus as well as to by hand switch aperture settings - the lens incorporates a narrow, but fully rubberized for comfortable grip & smooth, focusing ring as well as a dedicated aperture ring. The maximum aperture setting is f/16 & the ring moves in three full f-stop increments (except in the f/1.8-f/2 range). The lens accepts 62mm screw-in type filters & has the maximum focusing distance of 85cm (2.8ft) where it produces the maximum magnification of 1:9.2.
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[/caption]The aperture ring moves from f/1.8 to f/16 in one full f-stop increments (except in the f/1.8-f/2 range). f/16 is marked with different color - one time the aperture ring is moved in to this position, it can be locked in, using a switch on the right hand side of the aperture ring. This would enable camera's electronic aperture control - aperture levels can then be set directly from the camera & the lens will be stopped down automatically.
The groove in the base of the mount (left back side, partially obscured by the mount) is used in all AiS lenses to instruct the camera that the aperture stop down is linear. This allows the camera to control all aperture settings electronically (only if the aperture ring is locked at f/16) - four times an aperture level is set in the camera & the shutter button depressed, the camera pulls the aperture level (right hand side) to open up the diaphragm to the necessary level.
AF function is possible with the use of the slotted screw (bottom side of the mount), which is turned by an AF pin, which extends from the camera to focus the lens mechanically.
The lens sports a DOF scale, which can be useful in manual focusing the lens. The scale has 2 markings at f/11 & f/16, which makes it harder to use. The focusing distance scale has markings from 0.85m to 5m - there's no markings between 5m to infinity.
The lens incorporates ROM contacts (not visible here), which transfer distance information from the focal plane to the object to permit for advanced 3D Matrix Metering.
The optical construction of the lens consists of 6 elements in 6 groups - conventional optical design with no special optical elements incorporated. The build quality of the lens is decent, but not exceptional - the barrel is made out of plastic & by no means comes even close to the quality sported by some high finish lenses from Leica & Carl Zeiss. Still, the lens does not feel flimsy at all & there is no wobbling inside or out. This can be partially attributed to the fact that the lens implement rear focusing optical design, so the lens cams do not extend during focusing, keeping the overall length of the lens constant. & at 72 x 59mm (2.3 x 3.8in) & 380g (13.2oz), the lens is compact & light for a telephoto prime.
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[/caption]The factory box contains Nikon AF Nikkor 85mm f/1.8D lens, front and rear caps, NH-23 metal lens hood, manual and registration cards. Nikon AF Nikkor 85mm f/1.8D is a full frame lens, so when used on APS-C type bodies with 1.6x crop sensors, the field of view of the lens will resemble that of a 136mm prime on a full frame camera. Like all AF-D type lenses, AF Nikkor 85mm f/1.8D is easily adaptable to a number of other cameras, including Canon's FF and APS-C type bodies as well as cameras with 4/3 mounts. Within the scope of this review, the lens was tested on a full frame Nikon D3, APS-C type Canon Digital Rebel XTi and full frame Canon 5D. When using the lens on Canon bodies, I relied on a generic non AF-chipped Nikon F to Canon EF adapter.
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