lhogee Autocouple Extension ReJaose
ln normol proctice employing lenses with A. P. D. pre-setting deviie first the diophrogm,
ond then the comero shutter ore releosed, ln normol proctice the button of the Auto-
motic Pre-set Dioiphrogm lenses wh.ich is situoted immediotely in front of the comero body
releose is first depressed, followed by the octuol firing of the shutter by the comero body
relleose. When employing Boyonet Adopter Rings ond ExtensionTubes, however, the lhogee
Autocouple Extension Releose hqs been produced specificolly in order thot the outomotic
lens mechonism moy still be used. lt consists of the following single ports:
o) the coupling rod
b) the releose port
c) the pressure port ond
d) the push button,
Accorciing to the length of the odditionol exrtension releose port b) ond pressure port c)
ore odjustoble ond interchongeoble on the coupling rod o).
ln octuol proctice there ore, bosicoliy, two possibilities os follows:
(1) For short ex'tension up to 15 mm (Two-in-One ring, Poir of Boyonet Rings with or without o 5 mm
Extensicn Tube) the Autocouple Extension Releqse is ossembled os shown in Figure 5.
ln this instonce, pressure port c) with push button d) ore screwed into the releose button of the lens,
whilsl the pointed contoci of releose port b) is inserted into the releose button on the EXAKTA Vorex. The
distonce between the releose button ond pointed contoct hoving been odjusted occording to the length
ol the octuol extension, by tightening the knurled locking sqlews. ln this woy the coupling between the
two releose buttons is restored, ond by single pressure ol the finger on releose button d) both the lens
diophrogm qnd ths comero shuttet ore releosed simultoneously,
(2) For extension from 20 mm to 60 mm (poir of Boyonet Adopter Rings ond Extension Tubes) po*s b)
ond c) must be reversed. ln this cose, therefore, the pointed contoct of port b) is inserted into the lens
releqse qnd the pressure port c) is screwed to the cqmero releose by meons of releose button d), Then
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