18.07.20 Cloudy with blue teasers.

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Saturday 18th 15.00 76/73F Windy. 

Early cloud is clearing now and then. The disturbed area in the southern hemisphere is still present though further west.

I have pushed these first images with extra sharpening to better define the fibrils. The disturbed area is too large to capture with 800x600 with my augmented focal length. I ought to find a way of establishing the actual focal length when attached to the 1.25" nose of the camera.

Just because a GPC claims 2.6x does not mean this is true for all positions within the focal length of the telescope objective. These TS GPCs are intended for allowing binoviewers to reach inward focus. Without having to saw big chunks off the telescope's main tube.

Most binoviewers have a very long glass path length which must be compensated for. So the GPC is screwed into the nose of the binoviewer a very long way inside focus. The GPC's effect is much reduced on the camera nose. Which is very much closer to the focal plane.

 astronomy.tools

15.30 77/74F. The seeing has gone to hell now. A fuzzy mess, shaking vigorously. Processing does nothing useful. Breezy in the dome. Keeping it cool. I went back throughout the afternoon but the seeing conditions did not improve. The cloud was often far too dense anyway.

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