Hello,
Double Cluster in Perseus with 150-mm F/4 and coma corrector + ASI071MC-c, 174 x 60s from suburbs. Stars are a bit elliptic at left corner due to a concern with coma corrector alignment I think, along with some astigmatism (slight crop). Autoguiding was near perfect, thanks to a better balancing, showing a better result than in my recent image of Leo Triplet.
The histogram was voluntarily saturated because I did want to record the diffraction spikes for aesthetic considerations, however since the well capacity is by far greater than my other ASI cameras, the 071 can easily record both faint stars and unsaturated, bright stars in the same field.
Raw frames are very clean. Sensor temp was +3°C because I recently experienced dew on the protection window but Sam told me I simply forgot to click on "anti-dew" (SharpCap) ! This won't happen any more. The quality by far exceeds all my previous images of the same object with my DSLR.
Nicolas
