Sigma 14-24 f2.8 Art or Sony G Master 16-35/2.8 for wide field Astrophotography (& Landscapes)?

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Sigma 14-24 f2.8 Art or Sony G Master 16-35/2.8 for wide field Astrophotography (& Landscapes)?

I realize that Sony costs almost USD 1000 more but I am looking for long-term investment for a good wide-angle lens. I am trying to convince myself (mainly wifey) to splurge a little and justify myself a birthday gift.

I shoot with A7iii. I use Tokina 20mm f2 for astro photos (milkyway/star trails) and for wide-angle landscapes. I like Tokina but sometimes I feel 20 mm is too narrow for astro. Also, most of the times 20mm ends up being too wide for landscapes. This is why I am looking for a ideal astro/landscape zoom lens. I often find myself switching out Tokina 20mm to Sony 24-105 f4 for landscape shots. Also, more than 70% of landscapes are between 24 &50 mm, with approx 40% of shots falling between 24 & 35mm.

I have been lusting after Sony 16-35 f2.8 for a while, but the $2000+ price tag has kept me away. I thought Sigma 14-24 might be a good compromise since 14mm would be perfect for astro photos. However, I am afraid I might still switch lenses for landscape shots.

Since I will be able to afford only one lens for foreseeable future, I want to make sure I get the one that makes most sense. Also, couldn't find any direct astro photography comparisons between these two lenses.

  • How big of a difference is 14mm vs 16mm for wild field astro? My main goal is to get a good astro lens that can piggy back as a good landscape lens. Not a lot of astro capability reviews for Sony lens.
  • How big of a difference is 24mm vs 35mm for landscapes?
  • Is IQ of Sony 16-35 G Master really one of the best?
  • Should I go back to the table and consider just a prime lens for astro?

Thanks for your time.

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