Leica M 10, Instructions Manual

Page: 190 / 229

EN
186
Additional functions
Selecting the sync speed range
Reproduction of the available light is determined by the shutter
speed and the aperture. A fixed setting to the fastest possible
shutter speed for flash operation, the sync time, leads unnecessari-
ly in many situations to a greater or lesser underexposure of all
parts of the subject not directly lit by the flash.
This camera allows you to combine flash operation with the shutter
speed generated in aperture priority mode to subtly change the
lighting conditions for the relevant subject to suit your composi-
tional ideas.
Setting the function
1. Select the menu item
Flash Settings
,
2. in the sub-menu
Max. Flash Sync. Time
, and
3. in the relevant list, either one of the automatic, focal
length-specific settings -
1/f
,
1/(2f)
,
1/(4f)
, or the desired
slowest shutter speed (in the range from
1/2s
to
1/125s
)
1
.
1
Only when using Leica M lenses with 6-bit coding, or with manual entry of the
lens in the menu.
Notes:
•
1/f
results in the slowest shutter speeds based on the rule of
thumb for blur-free pictures taken from the hand, e.g.
1
/
60
s with
a 50mm lens. The corresponding shutter speeds with
1/(2f)
and
1/(4f)
in this example would be
1
⁄
125
s and
1
⁄
250
s.
Important: The setting range is limited to
1
⁄
125
s, even if the focal
length used is longer.
• Manual exposure control also allows any shutter speed up to the
sync speed of
1
⁄
180
s to be set.
Selecting the firing moment
Flash photographs are illuminated by two light sources, the avail-
able light and the light from the flash. Parts of the subject that are
exclusively or primarily illuminated by the flash are almost always
reproduced sharply (provided they are correctly focused) due to
the extremely short pulse of light. By contrast, all other parts of the
subject – those that are sufficiently illuminated by the available
light or illuminate themselves – are portrayed with different de-
grees of sharpness in the same picture. Whether these parts of the
subject are reproduced sharply or “blurred”, and the degree of
blurring, is determined by two independent factors:
1. the shutter speed, i.e. for how long these parts of the subject
“act upon” the sensor, and
2. how quickly these parts of the subject – or the camera itself
– are moving during exposure.