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I just upgraded from a Canon t2i to the Sony A7ii. Loving the sony world. Looking to purchase an affordable lens for astrophotography. Previously I used the Rokinon 16mm f/2.0, but that only works for crop sensors. So need to upgrade. What do you recommend? I really like the Rokinon lenses, particularly the Rokinon 24mm f/1.4 ($549 USD), but does it make more sense to get a Canon EF mount and just use an adapter. Or is there an advantage to use the Sony E mount.

(Apologies for the hyperlinks, still trying to figure out posting on this forum) My wife and I traveled to Zon National Park in Utah, USA in May of this year. Here are a few of my favorites: Our first hike of the trip. Taken at sunset from Canyon Overlook Trail. 24-70 f/4 at 24mm f/9 HDR base image 1/200 ISO 100 handheld. https://flic.kr/p/ULSJ45 View of the Watchman formation from the Watchman hike. 24-70 f/4 at 24mm and f/5.6 1/600 ISO 100 handheld. https://flic.kr/p/ULUYF7 View of the Watchman formation near sunset on a day with better clouds. 24-70 f/4 at 35mm f/9 1/125 handheld. https://flic.kr/p/UQM6j8 View of mesa wall at sunset. 24-70 f/4 at 36mm f/9 1/100 ISO 100 handheld. https://flic.kr/p/UfMPs5 Sunrise photo taken on our hike to observation point. We took a cheater's hike starting from a trailhead outside of the east enterance to the park. Made the one way trip distance around 3.7 mi on to of a mesa vs the 8mi starting from the canyon floor and hiking to the top. My wife is pregnant, so we had to be conservative on trip distances. 24-70mm f/4 at 49mm f/7.1 1/80 ISO 160 handheld. https://flic.kr/p/UQMDBp Taken from observation point. You can see angel's landing on the right and have a breathtaking view of the main canyon. The virgin river is seen winding though the canyon floor, closely followed by the park access road. 24-70mm f/4 at 24mm f/10 1/30 ISO 100 tripod mounted. https://flic.kr/p/UfPB4d Night shot taken of the main entrance park sign. E 16mm f/2.8 at 16mm f/2.8 1/20 ISO 800 tripod. https://flic.kr/p/UMmkU9 Night shot taken from near main park entrance. Watchman formation is in view. E 16mm f/2.8 at 16mm f/2.8 1/20 ISO 800 tripod. https://flic.kr/p/TBn1SV Those are some of my favorites. We also saw Bryce Canyon National Park and Arches National Park while we were there, but those pictures will be in another post. Here's the link to the trip album on Flickr: https://flickr.com/photos/149544869@N08/sets/72157681970352140

120mm Reflector telescope TAL-120 + A7II (with la-ea3 adapter + A mount to m42 adapter to attach it to the telescope)