hha

This sounds too good to be true. Does the manufacturer have a website to support this claim? hha

Very nice for first try. I also have gotten good results using Sequator (with high dynamic range enabled) with no bias and dark frames. What 400 mm lens  and what f-stop did you use? hha

very  nice. hha

Very nice image. Why did you shoot 30 sec at iso160? You could have used iso16000 and 1/30 sec, hand-held. How much would the image have degraded?  Maybe go back and try again and let us know. I ...

Very nice. Did you stack multiple pictures? This is what I would have liked to get, but my shortest exposures (in 5 shot bracketing) were 1/2500 f/2.8 iso800.  This burned out the fine details ...