Ode to the Pentax 645: The Quiet Romantic of Medium Format In the world of medium format photography, some names shout. Hasselblad — the status (or dare I say it, pretentious). Mamiya — the muscle, the dependable workhorse, all business. But then there’s Pentax.  Humble, earnest, quietly brilliant.  And among its creations, the Pentax 645 …