Peiasdf: Just checked out Pentax's lens line up and I cannot find a single fast normal prime. The cheapest "50mm" is 35mm f/2.4 at $180 while the fastest is 31mm f/1.8 at $1,000. Where is the cheap f/1.4~f/1.8?
Good cameras, weird ass lens line up.
The Pentax-FA 50mm 1.4 is generally available for around $300 new in box. Don't think it's still in production, though. A cheap 50mm 1.8 is also about to go into production under the Pentax-DA line at a MSRP of $250. The DA* 40mm 2.8 pancake is quite nice but is definitely a step up in the price bracket.
There are also tons of old k-mount fast primes, both manual and auto focus, and since Pentax is one of the few manufacturers that has committed to legacy compatibility, using them is quite painless.