Sky: Challenge, #1

A photograph of the moon in monochrome, highlighting Tycho crater

I’ve set myself a non-committed, loosely monitored, non-binding frequency photography project. Objective is 5 photographs per week, not necessarily posted on the same day they were taken, and the subject will be: Sky.

I just missed the most recent full moon by a day (the Moon Phase Pro app on Android Market is excellent for reminders, but doesn’t help the weather) but this is close enough. This is taken through a telescope pointing at the southern hemisphere of the moon, which I’ve rotated 90 degrees clockwise so that the bottom is pointing to the left.

Unusually, I can’t fit the moon fully into the frame with my telescope – it turns out I bought the wrong one for astrophotography, though it’s great for viewing, and so I can only focus with an SLR when I’ve got a 2x Barlow lens in the eyepiece holder. With crop factor from an APS-C camera I think this means it’s effectively a 2080mm lens, and the vibrations you get from the slightest movement testify to this. This image shows rays of ejecta from the Tycho impact crater are clearly visible on this rotated image of the near full moon taken on 14 August 2011. This is a slight crop of an image taken using a Canon 7D and 650mm reflecting telescope with a 2x Barlow. Shutter speed was 1/30 second though I’ve decreased this by nearly 1 stop.

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