Nikon Nikon FA, Nikon Nikomat FT manual Duplication Work and Photomicrography

Duplication Work and Photomicrography

In copy work, s side duplication, and photomicrography, you must make exposure compensation with centerweighted metering, because these types of photography represent unusual contrast situations Some lenses automatically switch the metering method to centerweighted. The table below shows the relationship between specific types of photos and proper exposure. Since this is meant to be only a guide, in practice you should make further compensation by experimentation until you achieve the proper results.

•The exposure compensation values listed below are reference data obtained when genera/ purpose film was used With color reversal film or microfilm for duplication work, it is advisable to take additional shots with + one stop exposure compensation as these films have very small exposure latitude.

•To avoid vibration, you can make the exposure by turning the illumination on and off

•It is advisable to use a cable release to eliminate camera vibration.

		Method of
	Subject	exposure	Exposure compensation	Required accessories	Remarks
		measurement
	Photographs and				For high contrast subjects, use of an
	pictures with con-		Compensation not necessary		18% reflectance gray card in
	tinuous gradation				determining exposure is
Copy work		Full-aperture or		Micro Nikkor 55mm	recommended With the card, no
			Approx. + 1 to + 2 slops ror
	Documents and	stop-down	black letters on white	f/2.8;	exposure compensation is required
				Cable release	regardless ot whether the
	drawings of high		background: approx. -1/2 to -1
	contrast		stop lor white letters on black		background is black or white
			background.
	Slide with continu-		Approx + 1 to +2 stops	Micro-Nikkor 55mm
	ous gradation			f/2.8;
			Approx + t-1/2 to +2-1/2 stops
				Nikon Slide Copying	When using Nikon Sl de Copying
Slide		Stop-down	for black letters on white back-	Adapter PS-6:	Adapler PS-6, set the flood lamp
duplication	Slide of documents		ground.	Nikon Bellows	30cm away from its opal plate
				Focusing Attachment
	and drawings
			0 to approx -1 /2 stop for white	PB36-
	photographed
			letters on black background	Cable release
					Generally, results come out better
Photo					with more exposure in photomicrog-
					raphy. The compensation value on
micrography	Prepared specimen	Stop-down	Approx. +1 stop	Microflex PFX
					the eft is only a guide: determine the
					compensation value by test shooting

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