Quote:
Originally Posted by Decimus
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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The saturation point is all to do with well depth and at 40-60s it shouldn't even come close to saturation on anything but the brightest of objects even at ISO800.
What aperture were you using on the Zeiss 135mm?
At ISO800 the D850 likely has near a stop of dynamic range over the KAF8300 or ASI1600 variants.
Lagoon Nebula at ISO800 with 180s exposures at F/5.2.