Wednesday, December 10, 2008

Almost Full Moon

The moon is pretty big and pretty bright tonight, and I'm supposed to practice focusing my new telescope.

ISO 100, 1/100s, and the telescope naturally provides f/8.



On the canon XTi, the 500mm lens acts like an 800mm. The camera shoots 3888x2592. This image is 1778x1778. Ignoring the wasted sky outside the central square, cropping doubled the apparent size of the moon.

Clearly, I'm not finished practicing, that focus needs to be sharper. Still, an interesting addition to the collection, especially considering the price. Of course you have to count that against the time you spend doing multiple takes, trying to get the focus right. Let's rate that at just $20/hr ... it adds up.

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