Re: Help taking photos of the stars!!!!!!!!!!!!
You'll want the lens at its widest setting, 18mm. Using the manual focus ring, and the LiveView function, as others suggest, zoom in on a star in the target field, then twiddle the focus ring until the star is in sharp focus. A piece of painter's tape can be used to secure the focus ring, once things are set.
The focus will likely change from night to night, based on temperature, so you'll get lots of practice.
With a tripod, your exposures will be limited to a few seconds, maybe 10 at the absolute outside, depending on the elevation (altitude) of your target field in the sky.
CGEM 800 HD, NexGuide,
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XT8 Limited Edition, Oberwerk BT-100, Canon 20D/20Da/T3i/60D/5D Mk III, various eyepieces, adapters, geegaws, widgets, and tiddlybits