Zhumell Rangefinder RF645 - Manual (Page 23)

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4. Other Features 4-3 Electronic flash photography
area photographed
illuminated area
4. Other Electronic Flash Features
* Exposure compensation: The flash exposure of the Speedlight RF 20 can be compensated
from -3 to +2 stop in ½-stop increments according to the subject's reflectivity.
* Backlit LCD: For insufficient lighting, the LCD panel of the Speedlight RF 20 can be illumi-
nated from the back for better legibility.
* Illumination Angle Adjustment: Two illumination angles for the 65mm lens, the normal
illumination angle, and the 45mm lens, the wide illumination angle, are provided with the
Speedlight RF 20.
Note: The illumination range of the Speedlight RF 20 is a vertically oriented rectangular
area.
4. Other Features 4-4 Long exposure photography
4-4 Long Exposure Photography
The longest nominal shutter speed of the Bronica RF 645 is eight full seconds. If a longer
exposure is required, set the shutter speed dial on bulb ("B"). The electronically control shut-
ter system of this camera stops consuming battery power one second after the shutter click
in bulb operation in order to conserve the battery. Still, it is strongly recommended to carry
backup battery cells if repeated long exposures are anticipated.
Note 1: The viewfinder LCD displays "BUL" as the shutter dial is set on "B".
Note 2: Never try to remove the lens from the camera during a long exposure.
4. Other Features 4-5 Infrared Photography
4-5 Infrared Photography
To photograph with a monochrome infrared film, follow the proce-
dures described below.
1. Focus normally. Note the location on the distance scale correspon-
ding to the distance scale index line.
2. Rotate the focusing ring slightly to shift the focus point to the
marked point with the "R" symbol adjacent to the distance index line.
3. Attach an infrared filter on the lens and shoot. Note: For more
details, refer to the infrared film instructions.