I have Canon EOS mount lenses, and a QSI583ws-8 camera. I recall
QSI had EOS adapters available, but they're not cheap - US$199 from OPT.
Bintel have the
ZWO T2 to EOS adapter for AU$59 and I'm wondering if there's any reason this can't be used instead?
My camera is a T mount (42x0.75), and I think T2 is the same? Backfocus on my camera is 35.56mm. Pretty sure backfocus on EOS lenses is 55mm.
The specs on the ZWO seem to use different terminology, because they talk about the ASI1600 only having 6mm backfocus, which doesn't sound right? There is a filterwheel version of the adapter that's thinner.