An early test image without a lot of details so we'll have to be careful in reading too much into it, but ...
Yes, also from looking at the resolution in the stars I'd say it's binned. Even binned you still have that nice wider fov from the larger chip (I think the numbers say about 50% more in linear size than the 829).
I'd gladly give up a little sensitivity and use 5-10s exposures and stacking for the increase in resolution ... but it's sure nice to have the option.
It is however a very impressive image for what appears to be stacked 1 second exposures (I wonder how many in the continuous stack). From where the histogram black and white levels are set there is also a pretty severe stretch of the image to bring out those details - which explains the brighter background and the amount of the galaxy seen.
With a little vignetting seen I'd guess there's also a focal reducer involved, the image looks to be taken at around 1000mm. As we've discussed many times before the use of a focal reducer will be one of the things to be careful of with a larger size sensor. A setup that works well on 1/3 or 1/2" sensors may start to be a issue on larger ones.
Background noise levels seem reasonable, but we are dealing with a very short exposure and a stacked image.
As always it will be fun to see additional images with more details, taken under different conditions with different scopes.
Edited by mclewis1, 31 July 2015 - 12:34 PM.