Re: Fun with the Sony A7 Series Cameras( all of them)
Here are a few more grabs from the heavens.
The first is actually my first attempt at deep sky astrophotography. It's composed of 30 x 30-sec exposures of galaxy M51, more popularly known as the Whirlpool Galaxy. The stars aren't quite round (probably due to the windy conditions), but I was happy with the unguided tracking capability of the Atlas Pro + Celestron Edge HD 8" sct. Processing was done in DSS/Photoshop, as my PixInsight processing skills are awaiting refinement.
The second shot is a single, 120-second, wide-view shot of the Veil Nebula at ISO 3200. I used a Sigma 180mm 2.8 OS at f2.8. Once I actually get around to stacking and processing this target, noise will decrease dramatically - what you're seeing at this size are stars, not noise - and the nebula will pop in much greater detail. However, the image is proof that even an ancient A7R, unmodded, is capable of picking up H-Alpha (Hα) emissions with a signal exposure.
The third shot is a single, 30-second capture of an unknown (to me, right now, without my notes) part of the Milky Way, taken with the same setup at f3.2. What a nebulous, dusty place we live in!