Nikon 85mm 1.8

Ik citeer even een engelstalige bron die het beter uitlegt.

There is a Tab on the outside edge of the lens mount on most Nikon Bodies at about the 8 oclock position when looking at the front of the body. This tab is your Minimum aperture Switch . When using AF Glass this tab moves a bit when you Aperture Ring is set to minimum telling the Body Aperture is set to minimum and the body has the full range of aperture settings available.

Pre AI lenses have an Aperture ring that fits flush to the body around the lens mount. This Full aperture ring can Break that tab in which case you lose P,S,A and all the scene modes . You would be limited to M mode only unless you can jam that switch closed. With CPU lenses you would also have to disable the CPU info by taping over the contacts otherwise a CPU lens will not function in M Mode either.

the Minimum Aperture Switch on the D40 D40X and D60 are built differently and are not susceptible to Damage in this manner.

AI and AI-S and Later lenses have most of that edge of the Aperture Ring Machined away leaving a very short post to engage that switch when the aperture is set to minimum as well as a much longer metering ridge used with AI compatible Cameras and the D300, D200, etc so the camera can tell the differance between wide Open Aperture and the aperture setting selected for the shot. This is enough to allow Aperture priority shooting with applicable cameras.

As you have probably Noted , G lenses have no aperture ring, all info being transmitted via CPU contacts. They of course cannot be used on AI AI-S cameras.

En hier zie je het. Een doe-het-zelf conversie:

Onder dat stukje tape en meer naar rechts is er wat materiaal verwijderd.

Vergelijk het met non-ai:

De achterste ring loopt helemaal door.

LOU JANSEN

JeroenW

Nikon Sjoerd

JeroenW