sigma ff, sigma ff high speed prime, sigma ff high speed primes, 20mm lens, sigma 20mm, sigma 20mm cine prime, sigma 20mm prime, sigma 20mm ef, sigma 20mm e, sigma 20mm pl, sigma cine, sigma cine lens, WZV966, WZV967, WZV968, sigma 24mm, sigma 35mm, sigma 50mm, sigma 85mm, 412966, 412967, 412968, 401966, 401967, 401968, 340966, 340967, 340968, 311966, 311967, 311968, 321966, 321967, 321968