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Leica M-series User Manual 35
The zoom button can optionally be operated
either with or without ratchet steps. Continu-
ous zoom is possible when the ratchet steps are
disabled, which many users find convenient.
On the other hand, when the ratchet steps are
enabled, photographs, measurement results
etc. can be reproduced more accurately.
Enabling and disabling ratchet steps
1. Push the button towards the knob to enable
the ratchet steps.
2. Push the button away from the knob to
disable the ratchet steps.
Magnifications and fields of view
The formula on page 62 provide additional
information about the magnifications and field
of view diameters, with consideration given to
the position of the magnification changer and
the eyepiece and objective combination used.
Ratchet Steps and Magnification Levels