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Thanks Greg, Bo, Dunk, Suavi and Colin. All of my imaging mates down here are die-hard monochrome CCD fans, and when you see what such gear can produce, it's persuasive. I like my Nikon D850, but I noticed last night that 40 seconds at 800 (moonless night) on a Zeiss 135mm (attached to a dovetail plate on my Vixen mount) was more than enough to saturate the sensor; 60 seconds was overkill. A ccd would, presumably, take longer before it reached saturation? The QHY 367 is full frame cooled cmos, so I guess that the cooling and maybe one or two other tech tweaks, are what diffentiates it from an unmodded Nikon D850?Don't know.
The QSI 683 or the QHY367 might be the way to go....two very different beasts!
Thanks everyone for your helpful advice. Much appreciated.
Cheers,
Richard
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