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Got a QHY5L-II (Mono) recently and would guess it's about double the sensitivity of a SPC900NC. It's got a front ring that looks like it was meant for a microscope as it's too small to screw a filter on. Theo tells me there are new rings and adapters coming in the new year that will fit filters as well there is the OSC model coming. Did some speed testing as I run through a 5m usb extender and about 2m of cable and sure enough it slows things down a bit as does having the rest of my gear running. Here's the data so far. Haven't tried a ram disk yet but it should work as my hard drives aren't all that fast.
Cheers
Stephen
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