<https://stargazerslounge.com/topic/99411-moretus-clavius-tycho/#comment-986247>
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"Dear All, Thanks for the feedback and encouragement, it's much appreciated! Neil, there's a .pdf sheet here: http://www.ptgrey.com/support/downloads/documents/TAN2008006_Sensor_Response_Curve_Comparison_for_ICX445.pdf where PGR compare the ICX445 (Chameleon) to a few other CCDs, including ICX618. What's interesting is that the two are quite comparable even though the ICX445 has smaller pixels (3.75 v 5.6 microns). Of course, the frame rate is lower on he Chameleon, as you point out, but I've managed to get 25fps this evening using ROI. Peter, frustratingly, when I switched to 12-bit recording (for the attached shot) Firecpature doesn't seem to produce a .txt form (as it does for 8-bit shots) with all the relevant info in. Unfortunately I can't remember what shutter speed it was at. To be honest, I'm still trying to work things out. If you notice, there is some faint ghosting in the image (look at top of moon), which I'm trying to deal with. However, when imaging chimneys in distance this afternoon (in strong sunlight) the ghosting was removed by using a red filter, so I'll be keen to use this on next lunar shots. Like you say, though, when having a go at Saturn later this evening, I had to decrease the shutter speed, which met I couldn't image at 30fps anyway. I suppose that's a limit of my small(ish) scope (and f/30). I'm still working out how to use the cam to its full potential (and justify the cost!) but so far it looks worth it  Cheers, Nick PS Red channel Saturn from this evening attached. A bit over processed but nice to see the major division in the rings.  \n"
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