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| p.1 #2 · Fast wide primes, sigma 20mm 1.8 or zuiko 21mm 2??? |
The Sigma is not a lens for landscapes or such. It is stellar at short distances and medium large apertures. Wide open, it is quite OK on FF, but you'd not want to use f/1.8 if you don't have to. At f/2.8-5.6, it is very sharp and contrasty.
The corners never get really sharp, and there's some wavey distortion going on. This lens is more about short DOF and great midframe sharpness.
I traded mine for a Sigma 14/2.8, but I might get the 20/1.8 again.
Some examples on D700...