Exposure, Exposure metering method – LEICA M6 Rangefinder Camera User Manual
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PHOTOGRAPHY ▸ EXPOSURE
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EXPOSURE
EXPOSURE METERING METHOD
The Leica M6 does its exposure metering selectively via the lens
with working aperture. The light reflected by a bright round metering
dot in the middle of the first shutter curtain is captured and metered
by a photodiode. This silicon photodiode with attached converging
lens is positioned over the top left of the shutter. The metering field
diameter is 12 mm.
The exposure metering is therefore heavily center-weighted. Only
those subject elements that are within a circular section around the
center of the image will be considered.
Note
• The uneven coverage of the metering dot is due to the fact that no
condensed and thick layer of paint can be applied to the flexible
rubber lining of the shutter without negatively impacting on its
function. The measuring accuracy, however, will not be lessened
by that fact.