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Reference to the illumination. I have the 3.27 version of the synscan. Adjustment of the polar scope LED is via the set up menu, handset setting Polarscope LED using the L/R arrows. From the Wiruna dark site the optimum level was 8% (about the middle of the range for one bar showing on the hanset). This gave just enough illumination of the graticle to still see Sigma Octans.
The biggest trouble with the Sigma Octans asterism is seeing the 6.5 magnitude HIP 112355. This takes a dark site to recognise in the polar scope. Its limiting visual magnitude level can't be much better than about 7. The othe three stars at 5.5 magnitude are much easier
Barry
PS a note on the webcam: I use the webcam focused at infinity and afocal viewing of the polarscope
Last edited by Barrykgerdes; 02-04-2012 at 11:02 AM.
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