Unbelievably there were a couple of hours of clear sky (and no Moon) last night 🙂 As both the mini-WASP and the new Hyperstar III setup need tuning it was a hard choice of which one to work on. Expecting to finish the Hyperstar III and maybe even grab an image too – I went for the Hyperstar. Needed to refocus-train the system as there is a new camera on board, and then it was the old collimation routine. Got to a point of pretty good collimation but poor star shapes around the edges. Think this needs another bit of optical hardware to get rid of that – so next outing I suppose. Three hours work done before the clouds rolled in – can’t complain – better than nothing.
A couple of clear hours!
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So what’s the extra bit of optical hardware to help with star shapes?
It was an extra aperture that I have now removed as I took off the little fan that bolts to the side of the M26C CCD. The aperture “hid” the fan.