Rokinon lenses tend to be pretty good; for example see my review of the review of the Rokinon 12mm f/2.8 fisheye for Sony and review of the Rokinon 24mm f/3.5 Tilt-Shift Lens for Canon/Nikon and (same as Rokinon) Samyang 14mm f/2.8.
The Apple 27" iMac with Retina 5K Display (Late 2015) is $250 off and the best darn screen available for view images—and it comes with a free built-in computer. The MacBook with 512GB SSD is $450 off. See all Apple deals.
PC users might look at the $500 off deal on the ASUS 23.8" Z240 Series Multi-Touch All-in-One Desktop.