M = Manual
That means that the autoexposure feature/that light metering cell at the front is switched off. Your flashlight goes off at full power each time. After setting the ISO speed of your fílm at the ASA indicator you just read the aperture appropriate to the distance your subject is located.
The Standard Metrical Guidenumber of your flashlight is 28.
BLUE and WHITE = autoexposure ranges
You read the extent of those ranges and the appropriate aperture to use either for the blue or white range at the scale above.
The meaning of those figures 4 and 8 is enigmatic to me. (Hopefully I just got a bad day...)
EDIT: Yes a bad day...
Those are the appropriate two apertures for the automatic mode, indicated seperately from that scale. I never came across a flashlight of that kind that indicates those apertures seperately in addition. Nice feature, but yielding the chance to get outside the distance range if only looking at those seperate figures.
Last edited by AgX; 10-28-2013 at 03:43 PM. Click to view previous post history.