Sony FE 40mm f/2.5 vs Sigma 35mm f/2 or Loxia 50mm f/2.0 lenses for astro-work/milkyway

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Muqeem New Member • Posts: 9
Sony FE 40mm f/2.5 vs Sigma 35mm f/2 or Loxia 50mm f/2.0 lenses for astro-work/milkyway

Hi, how are Sony FE 40mm f/2.5, Sigma 35mm f/2 or Loxia 50mm f/2.0 lenses for astro-work/milkyway? Has anyone tested?

I know the focal length is not ideal and wide lenses are recommended. But if a lens is being considered to do all-round/daily jobs as well as bit of (casual) astrophotography and with budget cap. . .wider lenses have the limitation of either too large/heavy or expensive and being wide (for general purpose) one's subject appears small.

Today, I missed a secondhand Sigma 35mm f/1.4 DG HSM (old version) which got sold for a VERY VERY VERY cheap price though the downside of the lens is that it is fairly large and heavy. . .anyhow it is gone.

Unfortunately, Sony's FE 35mm f/1.8 has been reviewed to be poor for astrophotography by various people including mentioned in DPReviews' lens review.

Loxia 50mm f/2.0 will be a bit too tight (and expensive but I found a used one in excellent condition and in great price, costing the same as Sony 40mm f/2.5). Otherwise, is a manual lens and should certainly be sharper than Sony's 40mm f/2.5 (not sure how it compares to Sigma 35mm f/2).

Sony-Zeiss 35mm f/2.8 ZA is slowest amongst above, expensive and has heavy vignetting at f2.8.

Sony FE 28mm f/2 is an average lens, I have read though in budget and can be an option.

Thank you.

P.S. I have Sony A7Riii body

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