7.3.
DOF
C
ALCULATOR
Depth of Field (DOF) is the range of distance in a photo that appears to be in
sharp focus. Depth of field is a creative decision and one of your most important
choices when composing nature photographs.
Based on the focal length, aperture and camera type you have entered, DOF
calculator calculates the hyper focal distance. This is the focus distance where
everything from half the hyper focal distance to infinity is within the depth of field.
This is useful when deciding where to focus such that you maximize the sharpness
within your scene,
Use the actual focal length of the lens for depth of field calculations. The
calculator will automatically adjust for any "crop factor" for the selected camera.
7.4.
S
TAR SKY RULE
When taking pictures of the sky with stars at night, a long exposure time is
preferred in order to get as much light as possible onto the image sensor of your
camera. However, there is a limit if you are not taking star trail pictures. To get
sharp dot stars, you should not cross this limit. The exposure time limit is calculated
with a formula called Rule of 600.
You select camera model and actual focal length; the slowest shutter speed is
calculated automatically with the crop-factor of your camera already
accounted.
The stars near the equator move much faster than the stars near the poles. You
can choose Rule of 500 or 400 for fast moving stars.
8.
S
ETTINGS
8.1.
T
RIGGER
Change these settings to control the timing of trigger signals.
8.1.1.
P
RE
F
OCUS
T
IME
Default: 0 - Manual Focus
