Originally posted by Another dyemention I decided to keep my rokinon 85/1.4 and it's tricky to focus on my k50
Does the K-50 do focus peaking in LiveView? Focus peaking is just as good as any split-screen.
The cheapest and simplest solution to focusing manual glass on your Pentax, however, may simply be something like getting the Pentax O-ME53 magnifying eyepiece for $50, or something similar off eBay.
Otherwise, hunt around for a used Sony Alpha 3000. They are the cheapest Sony NEX with a built in EVF, and nice focus peaking, and have the same 20MP sensor as the K-S2. Even when new, they were going for $300 or so with a lens.