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<p> an entry from <a href="http://www.alpheratz.net/observing/"><i>Marc Murison's Amateur Astronomy Weblog</i></a>:<br> <b>Televue Powermate and Big Barlow</b> <p> New image scale available from here on. I now have a 2" <a href="http://www.televue.com/engine/page.asp?ID=42" target="_blank" class="outlink">Televue 4x Powermate</a> in tandem with a <a href="http://www.televue.com/engine/page.asp?ID=41" target="_blank" class="outlink">Televue 2x "Big barlow"</a> and a spacer. The resulting image scale (0.0665 arcsec/pixel) is well beyond what is reasonable for a 6-inch refractor, but having 15 or so pixels across a resolution element (~1 arcsec) allows aggressive removal of the webcam image resampling and compression artifacts. That I am able to get images at this scale at all is due to being fanatical about scattered light in the optical system. I'm now adding false color, which appears to enhance perceived contrast.

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