Bright-line view- and rangefinder
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BRIghT-LINe VIew- AND RANgeFINDeR
The Leica M9’s bright-line view and range finder is not
only a very highquality, large, brilliant and bright view
finder, it is also a highly accurate range finder coupled
to the lens. It has an enlargement factor of 0.68x.
The size of the brightline frame is optimized for the
full format of the Leica M9 and thus corresponds
ap proximately to the sensor size of 24x36mm
1
with
a distance setting of 1m. The brightline frames are
linked to the distance setting in such a way that paral
lax error the misalignment between the lens and the
viewfinder axis - is automatically compensated. The
brightline image and the picture are practically iden
tical over the entire distance setting range of 0.7m
to ∞. Practically identical means that at distances of
less than 1m the sensor records slightly less than is
displayed by the inner edges of the brightline frames
and records slightly more at longer distances (see
adjacent graphs). These slight variations, which are
rarely significant in practice, are due to the operating
principle:
Bright-line frames on a viewfinder camera must be
adjusted to the angle of view of the relevant lens focal
lengths. However, the nominal angles of view change
slightly when focusing – due to the changing extension,
i.e. the distance between the optical system and the
sensor plane. If the set distance is less than infinity
(and the extension is correspondingly larger), the
actual image angle is also lower and the lens records
less of the subject. In addition, the image angle differ-
ences are greater at longer focal lengths as a result of
the greater extension.
All pictures and brightline frame positions relate to 50mm focal
length
A Brightline frame
B Actual image field
Set to 0.7m:
The sensor records approx. one frame width less.
Set to 1m:
The sensor records exactly the image field dis-
played by the inner edges of the brightline frame.
Set to infinity:
The sensor records approx. 1 (vertically) /4 (hori
zontally) frame width(s) more.
1
The exact format is 23.9 x 35.8mm, corresponding to the usable
format of analog Leica M models.
A
B
Summary of Contents for L-E
Page 1: ...LEICA M9 M9 P Anleitung Instructions ...
Page 5: ...LEICA M9 M9 P AnLEItung English instructions on pages 90 177 ...
Page 7: ...3 ...
Page 17: ...13 ...
Page 105: ...101 ...
Page 137: ...Bright line view and range finder 133 28 mm 90 mm 50 mm 75 mm 35mm 135 mm ...
Page 183: ...1 33 1 9 1 36 1 35 1 34 1 39 1 37 1 38 1 41 1 40 1 43 1 44 1 42a 1 42 1 45 Signal ...
