Leica 20 002, Instruction Manual

Page: 65 / 146

EN
Picture mode
65
IMAGE TYPES
USING THE RANGEFINDER
IMAGE FIELD (BRIGHT-LINE FRAME)
The bright-line rangefinder of this camera is not just a very
high-quality, large, brilliant and bright viewfinder – it also doubles
as a highly precise, lens-coupled metering device. All Leica M
lenses with focal lengths between 16 and 135 mm are coupled
automatically when they are attached to a camera. The viewfinder
has a magnification factor of 0.73x.
The bright-line frame is coupled with the focusing function in such
a way that the parallax – the offset between the lens axis and the
viewfinder axis – is compensated automatically. At ranges under
2 m, the sensor captures slightly less than indicated by the inner
edges of the bright-line frame, and slightly more at longer ranges
(see adjacent diagram). These slight, in practical terms never
important deviations are unavoidable. The bright-line frames of a
camera with viewfinder must be adjusted to the view angle of the
focal length of the lens. The nominal view angle changes slightly
when focusing due to the changing draw-out, i.e. the distance of
the lens system to the sensor level. When the set distance is below
infinity (and the draw-out accordingly greater), the actual view
angle also decreases – the lens captures less of the image object.
The view angle differences at greater focal lengths tend to be larger
due to the greater draw-out.
22:45 PM 22.02.2012
999-9000
8234/9999 12 MP
2.8 F 1/8000 12500 ISO EV
INFO
A
B
All pictures and bright-line frame positions at 50 mm focal length
A
Bright-line frame
B
Actual image field
set to 0.7 m The sensor captures around one frame width less
set to 2 m The sensor captures the exact image field shown
within the inner edges of the bright-line frame
Set to infinity The sensor detects around 1 or 4 (vertical or horizon-
tal) frame width(s) more
Notes
• The bright-light frames illuminated by white light LEDs appear
alongside the exposure meter LEDs at the lower edge of the
viewfinder image, once the camera electronics are activated.
• The rectangular distance measuring field, which is brighter than
the surrounding metering field, is in the center of the viewfinder
frame. Please read the relevant sections for more information
about distance and exposure metering.