Monday 15 August 2016

astrophotography - What technique and settings should I use to capture meteor showers?


I'm just starting out with astrophotography and have read that this years most spectacular meteor shower display (at least where I live in Canberra, Australia) will be the Eta Aquarids Meteor Shower:




May 5, 6 - Eta Aquarids Meteor Shower. The Eta Aquarids are a light shower, usually producing about 10 meteors per hour at their peak. The shower's peak usually occurs on May 5 & 6, however viewing should be good on any morning from May 4 - 7. A thin, crescent moon will set early in the evening leaving dark skies for what could be an good show. The radiant point for this shower will be in the constellation Aquarius. Best viewing is usually to the east after midnight, far from city lights.



As I am new to this, I'm not too sure what settings I will need to use. I'd like to avoid star trails that may distract from the meteor itself. Advice on focal length, shutter speed, aperature and ISO would be appreciated. I'm using a 550D if that is relevant to the ISO recommendation.



Answer



My favourite site for astrophotography in formation is Catching the Light and I've linked that to their article on meteor shooting, but you may also want to read through the rest of the information there.


In a nutshell, however, it's moderately long exposures (5 to 10 minutes) on a sturdy tripod with the camera pointed at about 45 degrees to the radiant (where the meteors appear to come from). Focal length is up to you. A very wide angle will likely increase your odds of catching something, but it will be more faint. A longer length will reduce your odds of catching something, but what is caught will be much more visible in frame. The site author runs about 6 cameras at a time with varying focal lengths!


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