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Old 16-02-2013, 09:09 AM
Rob_K
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Join Date: Oct 2006
Location: Bright, Vic, Australia
Posts: 2,158
Fantastic work Terry, congratulations!

Here's my effort from this morning - no slit so I thought I'd do better at a wider scale (55mm) to reduce the comet to as small a size as possible. Bad logic, the spectrum reduces in scale too! Had issues with light cloud, heavy dew & car headlights in getting what I got. The severe vignetting is because I shot with an ordinary camera lens with the grating set in an old lens cap - it acts as a very restrictive aperture mask.

Anyway, pretty pleased, first time I've had a try at a comet. I 'borrowed' your calibration Terry as I haven't done a decent calibration for 55mm shots - thanks.

Cheers -
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