Nikon 1799 instruction manual Focusing Screens, Type M focusing screen

Optional Accessories—continued

•Focusing Screens

B

U

E

M

J

A

L

Supplied with the F6 camera. Fine-ground matte field with focus brackets. Good for general photography.

Matte/Fresnel field with 12mm-dia. reference circle and focus 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 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 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 and 12mm-dia. reference circle. Good for general photography.

Matte/Fresnel field with 5mm-dia. BriteView split-image 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 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.

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