Nikon D100 Product Manual - Page 33

Introduction-First Steps 5 Getting the Camera Ready for Use 5.3 Lock aperture at the minimum setting This step is not necessary if you are using a type G lens (type G lenses are not equipped with an aperture ring). If you are using a lens of another type, lock aperture at the minimum setting (highest f/-number). If you do not perform this step when using a CPU lens, the aperture displays in the control panel and viewfinder will show a blinking when the camera is turned on. Photographs can not be taken until you have turned the camera off and locked aperture at the highest f/-number. Detaching the Lens Be sure the camera is off when removing or exchanging lenses. To remove the lens, press and hold the lensrelease button while turning the lens clockwise. Non-CPU Lenses Non-CPU lenses can only be used when the function dial is set to M (manual exposure mode). In other exposure modes, the shutter release will be disabled. When a nonCPU lens is attached, the camera exposure meters will not function, and the aperture displays in the control panel and viewfinder will show to indicate that aperture can only be set using the lens aperture ring. For more information on: 176 Lenses for the D100 21