(04-26-2021, 01:21 PM)caero Wrote: How is the lens for astrophotography?
Should be ok based on the sample photographs at F/2. No smearing of details in the corners, so probably very little to almost no astigmatism.
The only problem may be the small amount of field curvature, which means you'd have to be very careful with focusing.
HTH, kind regards, Wim
Gear: Canon EOS R with 3 primes and 2 zooms, 4 EF-R adapters, Canon EOS 5 (analog), 9 Canon EF primes, a lone Canon EF zoom, 2 extenders, 2 converters, tubes; Olympus OM-D 1 Mk II & Pen F with 12 primes, 6 zooms, and 3 Metabones EF-MFT adapters ....