Originally posted by D1N0 Then the Samyang/Rokinon 14mm F/2.8 will do.
Yes, you're on my mind. The price is right and seams to perform very well from 2.8. I saw even a marriage photographer using it with excellent results.
If there is one bad thing is, mustache like, distortion; and this is not good for architecture... Samyang though, hearing the complaints, released a lens correction profile to fix this (for canon-nikon).
But I saw even professional videos for architecture advertisement, that this lens performs pretty well.
The purchase of a ff wide angle lens (prime or zoom) will be a very difficult decision... considering price - performance.