Hi,
Seem like quite a number of people like to "shoot stars". Below are a guide to the maximum exposure time allowed in order to avoid star trails when using a tripod. To get perfectly sharp stars, use only 1/3 of the maximum exposure time.
When aiming at celestial equator (Declination 0 degree)... basically overhead in Singapore.
Lens Focal Length: Maximum exposure Time
18mm: 55s
24mm: 40s
28mm: 35s
35mm: 30s
50mm: 20s
100mm: 10s
135mm: 7.5s
200mm: 5.0s
300mm: 3.3s
400mm: 2.5s
When aiming at Declination +/- 30 degree... around 60 degree above north/south horizon in Singapore.
Lens Focal Length: Maximum exposure Time
18mm: 65s
24mm: 50s
28mm: 40s
35mm: 33s
50mm: 23s
100mm: 12s
135mm: 8.5s
200mm: 5.5s
300mm: 3.8s
400mm: 3.0s
When aiming at Declination +/- 45 degree... around 45 degree above north/south horizon in Singapore.
Lens Focal Length: Maximum exposure Time
18mm: 80s
24mm: 60s
28mm: 50s
35mm: 40s
50mm: 28s
100mm: 14s
135mm: 11s
200mm: 7s
300mm: 4.7s
400mm: 3.5s
When aiming at Declination +/- 60 degree... around 30 degree above north/south horizon in Singapore.
Lens Focal Length: Maximum exposure Time
18mm: 110s
24mm: 85s
28mm: 75s
35mm: 60s
50mm: 40s
100mm: 20s
135mm: 15s
200mm: 10s
300mm: 6.5s
400mm: 5.0s
When aiming at Declination +/- 75 degree... around 15 degree above north/south horizon in Singapore.
Lens Focal Length: Maximum exposure Time
18mm: 220s
24mm: 160s
28mm: 140s
35mm: 110s
50mm: 75s
100mm: 40s
135mm: 30s
200mm: 20s
300mm: 13s
400mm: 10s
Enjoy "stars shooting" and have a nice day.
Seem like quite a number of people like to "shoot stars". Below are a guide to the maximum exposure time allowed in order to avoid star trails when using a tripod. To get perfectly sharp stars, use only 1/3 of the maximum exposure time.
When aiming at celestial equator (Declination 0 degree)... basically overhead in Singapore.
Lens Focal Length: Maximum exposure Time
18mm: 55s
24mm: 40s
28mm: 35s
35mm: 30s
50mm: 20s
100mm: 10s
135mm: 7.5s
200mm: 5.0s
300mm: 3.3s
400mm: 2.5s
When aiming at Declination +/- 30 degree... around 60 degree above north/south horizon in Singapore.
Lens Focal Length: Maximum exposure Time
18mm: 65s
24mm: 50s
28mm: 40s
35mm: 33s
50mm: 23s
100mm: 12s
135mm: 8.5s
200mm: 5.5s
300mm: 3.8s
400mm: 3.0s
When aiming at Declination +/- 45 degree... around 45 degree above north/south horizon in Singapore.
Lens Focal Length: Maximum exposure Time
18mm: 80s
24mm: 60s
28mm: 50s
35mm: 40s
50mm: 28s
100mm: 14s
135mm: 11s
200mm: 7s
300mm: 4.7s
400mm: 3.5s
When aiming at Declination +/- 60 degree... around 30 degree above north/south horizon in Singapore.
Lens Focal Length: Maximum exposure Time
18mm: 110s
24mm: 85s
28mm: 75s
35mm: 60s
50mm: 40s
100mm: 20s
135mm: 15s
200mm: 10s
300mm: 6.5s
400mm: 5.0s
When aiming at Declination +/- 75 degree... around 15 degree above north/south horizon in Singapore.
Lens Focal Length: Maximum exposure Time
18mm: 220s
24mm: 160s
28mm: 140s
35mm: 110s
50mm: 75s
100mm: 40s
135mm: 30s
200mm: 20s
300mm: 13s
400mm: 10s
Enjoy "stars shooting" and have a nice day.