Leica M Instruction Manual page 150

• Can be used with restrictions
Despite the high precision of the rangefinder on the Leica M, exact
focusing with 135mm lenses with an open aperture cannot be
guaranteed due to the very low depth of field. Therefore, stopping
down by at least 2 stops is recommended.
By contrast, live view mode (see p. 173) on the Leica M and the
various setting facilities allow unrestricted use of this lens.
• Can be used but are excluded from
p. 180)
– Super-Angulon-M 21mm f/4
– Super-Angulon-M 21mm f/3.4
– Elmarit-M 28mm f/2.8 with serial nos. before 2 314 921.
exposure metering (see
Classic
Notes:
• The Leica Customer Care department can upgrade many Leica M
lenses with 6-bit coding (for address, see p. 254).
• In addition to Leica M lenses with and without coding using the
Leica M adapter available as an accessory (see p. 224), Leica R
lenses can also be used on the Leica M.
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