Using the CQS Prism Finder (3)

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Meter Coupling Range

Therangeofusableshutterspeeds varies in accordance with the film speed (ASA). Astheshutterspeeds shownintheshadedareaofthedia- grambelowarebeyondtherangeof themeter,theshutterspeeddialis providedwithasafetylocktoprevent onefromenteringthenon-usablezone. Forexample,itcanbeseenfromthe diagramthat1/8sec.isinthe non- usablezonewhenusingfilmratedat 800 ASA (or higher); consequently, whentheASAdialoftheCdSFinderis setto800,theshutterspeeddialcan- notbesetto1/8sec.

*Toconservebatterypower,keepthe *Toobtainoptimumresults,followthe exposure meter switch set to OFF sameprecautionsoutlinedforthePD wheneverthemeterisnotinuse.Even PrismFinder(see“CorrectExposure whenforgettingtosettheswitchto Measurement”,p.38).

OFF,whenevertheCdSPrismFinder isremovedfromthecamera,theexpo-

suremeterisautomaticallyswitched offbecauseofthesmallsafetyswitch builtintothebottomofthefinder.

Usable Shutter Speeds (unshaded area)

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Image 44
Mamiya M645 1000S Using the CQS Prism Finder, ~... .. .-.-~, Meter Coupling Range, Usable Shutter Speeds unshaded area