Hi, would love to hear opinions!
Spec sounded great, ordered and just received this OSC. https://astronomy-im...94mc-pro-color/
A bit quick, as I misread the dark current test chart! Additionally, the product page said "..dark current of ASI294 is a little bit higher than ASI1600 from out test result", but I don't think so. I see now that the ASI294 dark current is not "a little bit" higher but 7.5 times that of the ASI1600.
Sam also responded that the camera is most suited for EAA.
I wanted an extra camera as I had no cooled OSC. To be used for various non-mono stuff. Will be a lot more at a dark site in the future.
One purpose is comets, with C11HD + Hyperstar. (I have sort of solved the Hyperstar/mono/filterwheel conundrum even without moving up to C14, using the ASI1600MMC+EFWmini with a carefully designed vignette. But an OSC will of course be needed for fast moving comets.)
ZWO has agreed to take back my unused (due to clouds) ASI294, for a purchase of a 071 or 094.
But they have no pickup-service anymore so exporting would really be a hassle.
No return until I'm absolutely sure.
I will of course be able to do longer exposures getting an ASI071 (https://astronomy-im...s/asi071mc-pro/), as the dark current of the 295 is 73 times that of the 071!
Then there's the read noise. I don't have much experience with these types of (Sony) sensors, so I don't know how much it means that the HCG does not kick in before gain=120. With a lot more readout noise below 120, I guess that even unity gain is undesirable for imaging DSOs, if I should want to have the otherwise high readout noise gone. (nearly 3 times the 071)
But with HCG the readout noise is superb like the ASI1600MMC.
Well depth and sesnitivity is fantastic, but I can't see these properties outweigh the SNR-issues.
Or do I miss something?