Ray - I emailed ZWO regarding these sensors, and they responded with:
Hi Richard
we don't think the new sensor is better than ASI290 for planetary
and they are not better than ASI1600 for DSO
so we may not have interesting to build a new line for them
Best Wishes
Sam
ZWO Co., Ltd.
At the moment the only vendor I can find for this sensor is Point Grey, who have the IMX264 in the (uncooled) Chameleon3 usb3 format for $735 USD. Maximum exposure is 12secs according to the product specs:
https://www.ptgrey.com/chameleon3-50...ion-sonyimx264