Update:
The Rokinon 14mm f/2.8 Ultra Wide-Angle for Canon (same lens) is also on sale, for a lower price at $207.20. The deal expires in 5 hours or when sold out. This is the lowest price seen for this lens! They also have the Rokinon AE14M-C 14mm f/2.8-22 Ultra Wide Lens with Built-In AE Chip for $303.20 (reg. $379)
Original Post:
Amazon Prime Day is still continuing — they have the Samyang 14mm f/2.8 IF ED UMC for Canon for $223.20. This lens is regularly $279. This deal expires in less than 2 hours or when sold out.
The Lonely Speck calls this “arguably the best, most affordable lens for astrophotography”.
As with other Prime Day deals, this deal requires an Amazon Prime membership and is only available while quantities last. You see the discounted price at checkout (if you have an Amazon Prime Membership or sign-up for a free trial.)