Nikon FM2 Instruction Manual - Page 25

Duplication work and photomicrography In copy work, slide duplication, and photomicrography, you cannot obtain correct exposu re by simply referring to the FM2 's exposure meter display because these types of photography represent unusual contrast situations. Expos ure compensation is required. Shown here is the table of the relationship between specific photo types and proper exposure. Since this is meant to be a guide, in practice you should make further.compensation by experimentation until you achievelthe proper results. • The exposure compensation values listed below are reference data obtained when general-purpose film was used . With color reversal film or microfilm for duplication wo rk , it is advisable to take additional shots with ± one -stop exposu re compensation as these films have ve ry 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 avoid camera vibration . Copy work Subject Photographs and pictures with continuous gradation Documents and drawings of high contrast Slide duplication General film with con.tinuous gradation Film of documents and drawings photographed Photomicrography Prepared specimen + "more exposure; -,' less exposure Method of exposure measurement Exposure compensation Required accessories Remarks Full-aperture or stop-down Compensation not necessary Approx. +1 to +2 stops for black letters on white background; approx. -112 to -1 stop for white letters on black background. Micro-Nikkor or AF Micro-Nikkor lens' Cable release For high-contrast subjects, use of an 18% reflectance gray card in determining exposure is recommended. With thecard , no exposure compensation is required regardless of whether the background is black or white. Stop-down Stop-down Approx. +1 to +2 stops Micro-Nikkor or AF Micro-Nikkor lens' oApprox. +1-112 to + 2-1/2 stops for black letters on white background to approx. -1 /2 stop for white letters on black Nikon Slide Copying Adapter PS-6 Nikon Bellows Focus- When using Nikon Slide Copying Adapter PS-6, set the flood lamp 30cm away from its opal plate. ing Attachment PB-6 background Cable release Approx. + 1 stop Microflex PFX Generally, results come out better with more exposure in photomicrography. The compensation valueon theleft is onlya guide; determine the compensation value by test shooting. 'Set the lens' A-M ring to "M." 25