[. . . ] No reproduction in any form of this manual, in whole or in part (except for brief quotation in critical articles or reviews), may be made without written authorization from NIKON CORPORATION. Rounded diaphragm opening makes out-of focus elements appear more natural. [. . . ] To select autofocus, while pressing the A-M ring lock release button, turn the AM ring so that "A" aligns with the A-M index. also , set the camera's focus mode selector to autofocus position. To select manual, turn the A-M ring so "M" aligns with the A-M index. With a Nikon autofocus camera, improperly setting the camera's focus mode selector and lens' A-M ring may damage the camera body. Ideal Can be used even though part of the view is a little hard to see Split image focusing is possible. But focusing is inaccurate Correction value for center-weighted metering When using the F6, you can correct the exposure value by setting "b6: Screen Conpensation" to "Except for B and E" in the Customize menu. Set this to "Except for B and E" regardiess of whether the correction weight is set to "0" When using the F5. set the compensation for the exposure value in custom setting number 18. When using a camera from the F4 series, turn the exposure adjustment diat for the finder screen to set the compensation. for details , reter to the instruction manual for the camera you are using. Blank: Unsuitable However, when using the M screen, this value is not used in order to allow you to use a rate of 1 to 1 or higher for close-up photography. When using a camera other than one listed above with a B2/B3, E2/E3, or K2/K3 screen refer to the B, E, or K column respectively. [. . . ] L ' effet de contrôle de l'image de défocalistation dépend des conditions du sujet, telles que la distance sujet/arrière-plan, la distance sujet/premier plan, etc. Focused distance Depth of field The first calues are for the PK-11A ring used alone and the other ones for the PK-11APK-13, PK-11PK-13, or PK-1PK-3 rings used together. [. . . ]