Exposure time is really a matter of trial and error - it can be anything from a few minutes to several hours depending on the conditions.
It is worth bearing in mind that a longer exposure will produce longer star trails, but will also usually dim the brightness of the trails. The stars complete one full rotation in 24 hours, or 15 degrees every hour, but my advice is to concentrate on getting a good exposure, and not worry too much about the length of your star trails.
Start with an exposure time of 5 minutes and keep doubling it until you get a good result. Once you get close to the right exposure time, use your judgement and previous results to decide whether to increase or decrease the exposure time.
That's all there is to it. Long exposure star trail photos are technically quite easy to shoot - the hardest part is staying awake!
No comments:
Post a Comment