Nikon 4799 F6 Instruction Manual - Page 168

Optional Accessories-continued • Focusing Screens Supplied with the F6 camera. Fine-ground matte field with focus B brackets. Good for general photography. Matte/Fresnel field with 12mm-dia. reference circle and focus U brackets. Suitable with telephoto lenses longer than 200mm. Center-Weighted or Spot metering is recommended. Etched horizontal and vertical lines added to B-type screen make E the E-type screen suitable for copying and architectural photography. Especially for use with PC-Nikkor lens. Fine-ground matte field with 5mm-dia. clear spot and cross hair for use in parallax focusing on aerial images, plus millimeter scales for M calculating magnification of individual objects or for measuring objects. Brilliant image in dim light. Suitable for close-ups, photomicrography and other high-magnification applications. Matte/Fresnel field with central 5mm-dia. microprism focusing spot J and 12mm-dia. reference circle. Good for general photography. Matte/Fresnel field with 5mm-dia. BriteView split-image A rangefinder. Rapid, accurate focusing for subjects with both straight lines and ill-defined contours. Suitable for general photography. Same as Type A but with BriteView split-image rangefinder line at L a 45° angle. Rapid, accurate focusing for subjects with both straight lines and ill-defined contours. Suitable for general photography. Type M focusing screen • Exposure measurement is not possible with type M screen. When using type M screen, it is recommended to set "Off" in the Custom Setting "a5-1: Manual focus" in "a5: Focus area illum" (x 95) due to the optical characteristic of the type M screen. 168