12
BEFORE USE
Requirements and Useful Items
*1: Working duration differs depending on types and the state of the
batteries used and photographing condition.
*2: Commercially available USB mobile batteries are recommended.
Be sure to use a power cable that is applicable to USB Type�C.
Low power consumption of the POLARIE U may cause a stop of
power supply as a result of a malfunction. Check the instruction
manual for the USB mobile battery.
*3: Make sure that your camera has functions that satisfy the following
specifications.
• A bulb shutter mechanism (B) is needed for long exposures. If it is not
available on your camera, both an ISO speed setting faster than 1600
and a shutter time setting longer than 15 seconds are required, or a
function that shutter exposure times are controlled.
• A remote shutter release is available as optional.
• Standard or wide�angle photography lens are recommended as it
makes tracking of celestial objects easier.
• Usable in manual focus, or possible to disable autofocusing and focus
to infinity. The autofocus rarely works correctly in night�sky scenes.
• DSLR cameras with an optical viewfinder (with ground glass focusing
screen) or “Live Focus” are preferable.
*4: For long exposure photography, it is much convenient to use remote
shutter releases which are not only controlling exposure times manually
but also setting up exposure times. Most infrared�type remote shutter
releases are not available for controlling exposure times, and they are
not recommended as the infrared rays affect imaging sensors.
Necessity
Item
Description
△
Outfit for Cold
Weather
Take measures against cold weather.
△
Shroud,
Plastic bags
Useful to protect equipment from sudden rain.
