Method Fix
a camera onto a sturdy tripod, load it with a high speed film, set the
focus to infinity , set the shutter to "B", aim at the target
area and press the shutter by the shutter release cable.
Applications
Constellations
A standard lens is sufficient for most
constellations. The aperture should be fully opened for best result. The
surrounding scenery can also be captured with a wide angle lens.
Star Trail
Increasing the exposure will record trails
of stars as the Earth spins. Try to shoot star trails of the northern
sky, all stars appear to revolve around the Polaris. If the location is
not dark enough, avoid exposing for too long or having the aperture
fully opened.
Other Celestial Phenomena
Phenomena involving brighter celestial
bodies (such as solar eclipses, lunar eclipses and Moon phases) can be
recorded by stationary method with proper exposure time. If the camera
has a multiple exposure function, expose once every 5 to 10 minutes to
record the celestial movement or the whole process of a solar or lunar
eclipse.
Since the starry heaven is rotating from East to West, exposure
time has to be limited in order to obtain a point image. The limiting
exposures are as follows:
| Focal
Length (mm) |
|
28 |
35 |
50 |
85 |
100 |
135 |
200 |
| Limiting
Exposure(sec) |
General
Sky Area |
25 |
20 |
15 |
8 |
7 |
5 |
4 |
| Area
within 30° of Celkestial Poles |
50 |
40 |
30 |
16 |
04 |
10 |
8 |
| 
