I’ve been around the block with the 10-24, the 18-55, the 35 1.4, the 23 1.4, and after all of that I almost never reach for anything other than my Rokinon (Samyang) 12mm F2. It is practically made for Astro, with all manual everything and the combo of a super wide FOV and fast aperture. I don’t have many samples of my other lenses, because the only shots I end up editing and publishing are from the Rokinon 12. It’s that much better than the others. Here are a few shots I’ve taken with it in the past year, some of which were picked up by BBC Travel and Korean Air (so you know it shoots at a high enough quality for major publications).
I’ve pushed it as far as 30s with minimal star movement in the corners (depending on how close the MW center I’m shooting) but it’s sweet spot appears to be 25s. ISO ranges from 1600 to 3200, but I think 2000-2500 yields the best results. For my particular lens it seems that a stop point about 1cm right of the infinity bracket is the best focal point for stars.
I love being able to set all of this up inside my tent/car before I even get outside. That is something none of these other lenses can accomplish, even the 23mm 1.4 was too finicky to set up ahead of time.
The Milky Way on a cloudy night in the Cordillera Vilcabamba, Peru.
The Milky Way over our camp along the Great Inca Trail east of the Cordillera Blanca, Ancash, Peru.
The Milky Way as viewed from a Maasai village in rural Tanzania.
The Milky Way Center provides the backdrop for a massive Inca ceremonial platform at Tambo de Soledad in the Callejon de Conchucos, Peru.
The Milky Way battles the haze of California’s Central Valley, seen from the foothills of the Sierra Nevada Mountains.
Hope that’s helpful to those who are curious!