Thanks for reminding me about the Sigma!
I did consider switching. But didn't, because Astrotracer. 🙂
I've had little success with Astrotracer below 35mm. It doesn't get along with the corner distortion of wide lenses.
Bryan, I'm torn between the Sigma 35mm and the trusty Pentax 15-30mm for night photography overall, but paired with Astrotracer, the Sigma 35mm Art is fantastic! Unfortunately Sigma has dropped K-mount support so the lens may become difficult to find new, but I'd highly recommend it!
Yes, as you can imagine, I was a little bummed about the results from a lens I paid $1000 for, but it is still very usable and a lot sharper than my 24-70 @ 50mm. But I use it for several other genres so I can justify the cost,...