Announcements After a short lecture we will adjourn to the Farm. We will try making star trails tonight. Tomorrow night is a 1st Quarter Observing Night.

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Presentation transcript:

Announcements After a short lecture we will adjourn to the Farm. We will try making star trails tonight. Tomorrow night is a 1st Quarter Observing Night. Set-up will start around 6:30pm. Class will not meet Thursday.

Making Star Trails

Basic Requirements Camera with wide-angle lens Remote Sturdy tripod Extra memory

Making Star Trails requires patients A good star trail can require several hours of imaging. Much of it can be automated, but…

Star trails with film was easy Step 1: load film Step 2: mount camera on tripod Step 3: point and focus Step 4: lock shutter open. Step 5: close shutter Step 6: develop film

Star trails with digital cameras requires multiple exposures

Star Trail images require calibration At a minimum, use dark frames If possible, use flat frames, too. Calibration and image stacking can be done with MaxIm or similar programs

You can do just star trails

The best star trails are composed

Sometimes it’s all about timing

Star trails are a good way to capture meteor showers

Star trails are easy to do on vacation

More vacation Star Trails