Preset Lenses; Auto Lenses Without Coupling Prong; Reflex-Nikkor Lenses; And Focusing Unit - Nikon PhotomicF Tn Finder Instruction Manual

Bellows FocusingAttachments, Extension Rings and Focusing Unit
To detemmine exposure, select the desired strutter speed and stop down
the lens manuaUy until the needUe centers.

Preset Lenses

Use the same procedure as above for lenses having preset diaphragms,
such as the PC-Nikkor 35mm f/2.8.

Auto Lenses Without Coupling Prong

Some lenses like the Zoom-Nikkor Auto 200-600mm f/9.5 have an auto
diaphragm but no coupling prong. Use the depth-of-field preview button
to stop down the lens until the needle iS centered.

Reflex-Nikkor Lenses

The Reflex-Nikkor 500mm f/8, lOOOmm f/11 and 2000mm f/ll lenses
have no aperture diaphragm. Adjust the shutter speed until the nee`Ue is
centered.
Note: Since focusing may be difficult or impossible at smaU apertures
due to image darkening on the screen, frst open the lens to full aperture to
focus. Then determine the correct exposure by the stop-down method.
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