Zhumell Rangefinder RF645 - Manual (Page 28)

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6. References
Exposure Measuring Range and Ev
The exposure measuring range with the RF645 is EV3 to 18 (with ISO 100 film).
For example: If EV 14 is the correct exposure with ISO 100 film, the shutter speed setting will be 1/250
sec. when f8 is set to the aperture ring. If the aperture is adjusted to, in the above case, the shutter
speed setting will become 1/125 sec.
*An EV 14 is the brightness outdoors on a bright sunny day.
ZENZANON-RF
100mm F4.5
ZENZANON-RF
45mm F4
ZENZANON-RF
65mm F4