Nikon FM3A Instruction Manual

Also see for FM3A: Specifications Repair manual

Nikon FM3A Instruction Manual Manual pdf 41 page image

41Tips• The depth of field changes depending on three factors; aperture, focal length of thelens, and shooting distance as follows.1)The wider the aperture opening, the shallower the depth of field, and thenarrower the aperture opening, the deeper the depth of field.2)The longer the focal length (such as with a telephoto lens), the shallower thedepth of field, and the shorter the focal length (as with a wideangle lens), thedeeper the depth of field.3)The closer the subject is to the lens, the shallower the depth of field, and thefarther away the subject is from the lens, the deeper the depth of field.• Controlling the depth of field gives your picture its own character.Depth of FieldWhen you focus on your subject, you will find that not only is the subject itself in focusbut objects in a certain distance range both in front of and behind the subject appearreasonably sharp. This in-focus zone is known as “depth of field.”Control of depth of field enables selective blurring of the background elements of apicture or letting the major subject stand out.By pressing the depth of field preview lever, you can check how the background imagewill appear in the photograph.Light-Metering MethodsFull-aperture meteringWith a built-in sensor, this camera employs TTL full-aperture metering to determine theexposure by measuring the brightness of subjects through the lens. With an Ai-type lensattached, full-aperture metering is performed, and you can set the exposure while main-taining full brightness in the viewfinder.Stop-down meteringThis method is used when the meter coupling lever does not operate in synchronizationwith the lens aperture.With this method, after making the aperture setting for actual shooting, the light is mea-sured when a Non-Ai-type lens or close-up ring is used.