In past I tested the 16-35 f2.8 I, II, Sigma 15 2.8 FE (and straighten the FE effect), Tokina 16-28, Tokina 17 3.5
Having a fast light compact f2.8 prime is just superb!
A pity that the Samyangs have no AF.
The nicest ones I tested the Tokina 17 3.5 (out of production) and the Sigma 15 2.8FE
Now I have the Canon 16-35 f4L IS but I don't like f4 lenses.
Aren't there any upcoming +-16mm f2.8 primes from Sigma, Tokina, Tamron,...?