ISO/1600
WB+/-
ISO/1600
WB+/-
21
HOW TO USE
Focusing and Composing the shot
Example 2
Cameras without Live View feature
Photographic Lens: 14mm focal length (Ultra-wide lens), F2.8
Camera: DSLR camera (applicable up to ISO256000)
POLARIE U Mode: Star-scape astrophotography
Purpose of Photographing: Milky Way and terrestrial foreground
The object of imaging in wide�field astrophotography and that in
star�scape photography are the light of stars which are so faint that
autofocus systems may hardly function properly on many cameras.
For this reason, it is necessary to focus your camera on an object
manually. Set the focus to infinity as the light of the stars comes from
infinite space.
Focus on the star while looking through the viewfinder of the camera.
If the camera is out of focus, the star is seen as a blurred disc of light
or the star is not visible on the focusing screen. If you turn the focusing
ring in the direction of reaching in focus, the blurred disc will contract to
become a point of light. If this is the case, the star is in focus. It is hard
to determine the focal point in this way and you will need patience. It
is recommended to locate the focal point by checking the focus with
the LCD monitor before you start photographing if you use the DSLR
camera. It is very difficult to focus on a dark star. It is recommended to
choose a bright star�like 1st�magnitude to make focus.
* It is subjective views and it may differ according to the highest ISO
speed of your camera.
Item
Setting
Comment
Shutter Speed
Bulb (B)
It allows for long exposure.
Aperture
(F-Number)
F2.8
It allows for taking as much light as possible
within a short time.
ISO speed
ISO3200
To shorten exposure time within the limit of
image deterioration.*
Exposure
60 seconds
It is set so that both stars and terrestrial
foreground are as if they are stopped.
Out of focus
In focus
