scrappydog Offline Upload & Sell: Off
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I will give you some Sony E-mount astro options, just so you get some coverage on that front. None of these lenses are general purpose normal range lenses. All are for wide-field astro photography.
Sigma 14mm f/1.4: very fast, very sharp in the center wide open and very sharp in the corners wide open, but not flat field so you have to focus in the middle, mid-field, or corners and work from there. I focus in the mid-field, then noodle out the astigmatism in the extreme periphery to get good performance across the entire field wide-open at 100% (i.e., no astigmatism in the corners, decent mid-field, decent center). I've seen shots from this lens of pinpoint stars across the frame at f/1.4, but that's a golden version of this lens (mine requires a little more work). This is a specialist astro lens with killer astro features (super fast aperture, focus lock, aperture lock, built in collar, designed to handle dew heaters, back filter holders in cap, etc.). It's big, heavy, and fairly expensive. If you do wide-field astro, it does not get better than this, irrespective of the platform. You can tell that this lens was designed by someone who does astro. People complain about the size and weight - if you care about astro, it's generally not a big deal. This is a good lens to pair with the Sony 24mm f/1.4 GM for an astro kit.
Sigma 14mm f/1.8: never shot it. It's supposed to be good, but not as good as the Sigma 14mm f/1.4.
Sony 14mm f/1.8: small lens for the FL and speed. It is sharp. My spouse has it. It's not flat field, at least not her copy so you have to generally stop down a little to get better overall performance across the frame (e.g., f/2.2). It's fast and light and definitely the preference for folks who prefer a lighter bag. This lens has no special astro features like the Sigma 14mm f/1.4.
Samyang 14-24mm f/2.8: small and light lens, takes 77mm filters. My spouse owns this one too. Her copy is super sharp across the frame wide open. I haven't tested how to get the best performance from this lens, but it is impressively sharp across the frame at f/2.8. I tested this lens in a dark location and if you focus in the center, you will get elongated stars in the corner, so testing is needed to get the best out of it. This lens has no special astro features like the Sigma 14mm f/1.4. That said, if you like a general purpose wide-angle lens, this one is small, light, and a good copy will result in excellent performance.
Sigma 14-24mm f/2.8 DG DN: I own it. It's my go-to general purpose wide angle landscape lens and astro lens. Moderately heavy, heavier than the Samyang 14-24, does not take front filters, but you can get a Nisi 150mm filter kit if want a polarizer, NDs. My copy is very sharp across the frame at all focal lengths, so it replaces a lot of primes for me. For astro, it's very good wide open. It's not as good as the Sigma 14mm f/1.4 though. I will never sell this lens because it is so good at every focal length and has a decent balance of size, weight, range, and speed. I recently went on a two-week trip to Namibia focused on astro and this was my astro lens.
People also use the Sony 16mm f/1.8, Sony 16-35mm f/2.8 II, and Sony 20mm f/1.8 for astro. No comments on those options.
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