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I’ve tried the Sigma 35mm f/1.4 Art with my ASI1600 and I was far from happy with the results. The 071 is a larger sensor, full frame much larger, than the 1600, so would only get worse.
Lenses that are great in daytime, or on paper, don’t necessarily translate to a good astro lens. Our objectives are more demanding, as we tend to pixel peep out to the corners.
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