I know I'm not the only one trying to decide between these two lenses. To some, a wide zoom and a fisheye may not seem like competitors for our money, but in my case the main focus would be underwater. There, it really does seem to be a tossup- a stop or so vs zoom range. I'm interested in hearing the rationale that others have made when faced with this same decision- especially from other divers, but landlubbers, too. Some things about my shooting: -My current main lens for diving is the 12-40 behind a 170mm dome; the dome should work fine with either lens. So far, 12mm has been wide enough but I've got a tropical trip coming up, and I suspect I'll want wider. -I own (and love) the Rokinon 7.5, so I'm use to shooting a fisheye topside. -Most of my diving is in low viz waters of the PNW- 10' viz on a dive is a good day. -I also like shooting pics of the Milky Way a few times a year on camping trips. -Although I'm cheap, I'm willing to spend the money on the 7-14. That said- the $300 difference is $300. Plus another couple hundred to adapt filters, and you're starting to get into real money that could go to trips, wet diopters, better strobes, fine bourbon, etc. Hive mind: go!