>>2841977Pentax does really well with M42 and all the K mount lenses.
Get a split prism replacement focusing screen, or if you're in a hurry turn until the camera beeps in focus peaking mode.
Pentax allows for auto metering with the green button (it throws the aperture for a moment) which is sick if you don't have time.
>>2842015Pentax for cost effective vintage playtime.
Honestly vintage lenses, except for very few exceptions, don't stand up to decent modern lenses for bread and butter qualities. Good modern zooms are catching up to excellent vintage primes let alone modern primes (50mm f1.2 Nikon, Sony T* 55/1.8, DA* 50, Sigma HSM and Art, FA* 85 etc etc).
Only weird vintage lenses like the Pentax "soft" prime, 50 & 35 f0.7, and swirl bokeh lenses really offer anything that modern does not - assuming you can afford modern lenses.
