Nikon N90 instruction manual ~C1& ,5 F5.6

SPECIAL FOCUSING SITUATIONS

I~C1& :,'5 F5.6	:J I	Autofocus operation depends on general lighting, subject contrast and detail, and
		other technical factors . In rare situations where autofocus (and manual focus with
		Electronic Rangefinder) is not possible, ~ ~ blinks telling you to focus manually with
		clear matte field (p. 48) or perform autofocus on another subject located at same
		distance.

A. Very dark subject

Focus manually with clear matte field , or for autofocus, focus on another brighter subject located at same distance, then use focus lock (pp. 38-43). Or, use a Nikon autofocus Speedlight to perform autofocus with Speedlight'sAF illuminator.

B. Low contrast subject

Focus manually with clear matte field, or for autofocus, focus on another subject at same distance but with more contrast, then use focus lock (pp. 38-43).

C. Strongly backlit subject or bright subject with shiny surface such as silver or aluminum, or scene in which there is a pronounced difference in brightness, such as the light patterns created by blinds.

Focus manually with clear matte field.

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