Originally posted by pres589 hadi, if you want to deal with manual focus, the Samyang 135mm f2 is supposed to be a very good lens. Understood if you don't want an MF-only lens for your DSLR; I generally don't like using them on my DSLR. Agreed that this seems like a bad place to be missing a lens. The old F 135mm f2.8 is supposed to be quite nice although it's not as fast as you're asking for.
the rokinon/samyang is actually the lens i'm using on the Sony. I dont mind manual focus, if there was a better focus peaquing available on pentax, like it is on the mirrorless system. If pentax refuses to release a 135 fast aperture lens, then i may eventually get a sigma 135 (or if rokinon/samyang) released an automatic 135 F2, then i may pick that up...
but that would only have to be on an A7RIII or something. Not liking my A7RII, and dont want to get the A7III.
I had the 85mm manual focus rokinon on pentax a while back. was a real pain to focus on anything that was shot wider than F4. so really no point getting a fast aperture lens if its manual focus (in my opinion)