ercial wrote:

My main lens is the SMC Takumar 50mm f1.4 and my wife's main lens is
the Pentacon and I can definitely say the Pentax is a lot worse wide
open; [...]

If you're comparing the Takumar at f/1.4 to the Pentacon at f/1.8, you're
not being fair. You should compare them both at f/1.8.