LEICA SF 40 Flash - Manual (Page 38)

EN
36
ZOOM REFLECTOR
The flash unit has a zoom reflector with which its illuminating angle
can be adjusted to lens focal lengths of 24 to 105mm. Depending
on the flash unit mode, this is done only automatically in
A
and
TTL
, only manually in
SD
and
SF
, or either automatically or
manually in
M
. There is also automatic adjustment when the focal
length of zoom lenses is changed.
Manual adjustment
Press the button 6 for approx. 3 s (infinity loop, 1x per focal
length stage)
• To display the focal length set, the color of the pilot LED 7
changes (s. next page)
Tip:
If you are using a zoom lens and do not always need the full range
of the flash unit, it can be helpful to use the flash mode
M
that
allows the shortest focal length of the lens to be set manually. This
guarantees that the picture edges are always fully lit without you
constantly having to adjust the lens focal length.
Example:
You are using a zoom lens with a focal length range of 24 to
90 mm. In this case, set the position of the reflector to 24 mm.
Notes:
• With automatic adjustment, as well as the settings outlined
above, there are also settings for the focal lengths 28 mm,
35 mm, and 70 mm.
• Automatic adjustment of the zoom reflector presupposes
camera models that transmit the focal length used to the flash
unit. If this is not the case, the focal length must be set
manually.
Please consult the relevant instructions for details on this
subject.
• The focal length is not adjusted automatically if
– the reflector head is pivoted
– the wide-angle di ff usion screen is is being used
– the supplementary di ff usion attachment is mounted
• All focal length details or settings in these instructions refer to
the 35 mm format, i.e. 24 x 36 mm. When using cameras with
smaller or larger formats, you have to compute the focal lengths
applicable for optimum use of the flash range with the help of
respective conversion factors.
Example:
Due to the APS-C format of the Leica T, the angle of view of its
Summilux-TL 1.4/35 mm ASPH. corresponds to a focal length
that is longer by the factor of approx. 1.5 - i.e. a 50 mm lens in a
35mm camera. Consequently, with the Summilux-TL 1.4/35 mm
ASPH. you would have to set the zoom reflector to 50 mm.
Please refer to the relevant instructions for the conversion factor
valid for the camera used.