16
EN
openings and the center spot results in dark to black round areas in the middle
of the image. Blocking the central beam also means that unfocussed light spots
are portrayed as bright rings.
ADJUSTING OF THE APERTURE
It is recommended first of all to set the aperture with the relevant ring (3) and
only then to adjust the focus, since the aperture scales (3b) are located on the
rotating front part of the lens mount and consequently cannot be seen
completely from above at all distance settings. To protect against accidental
missetting of the distance, you should hold the front part of the lens mount
firmly when setting the aperture.
FOCUSING
The focus is set by turning the front part of the lens mount on the gripping
section (4).
DEPTH OF FIELD SCALE
The scale (6) on the fixed back part of the lens mount shows the range of depth
of field for the distance that has been set. It is read from the relevant line
segments, marked with the aperture values.
Summary of Contents for THAMBAR-M 90 f/2.2
Page 2: ......
