Pentax's compact medium format lens — 45mm f/4 for the Pentax 645 or 67 system.
The Pentax SMC 45mm f/4 is a lens for Pentax's medium format camera systems. The specific mount and application depends on the variant — 45mm provides a wide-angle perspective on medium format, roughly equivalent to 28-35mm on 35mm format depending on the film format.
Optically good — sharp from f/5.6 with Pentax SMC multi-coating for good contrast and flare control. The wide-angle perspective on medium format provides dramatic environmental shots. Manual focus with smooth helicoid action. f/4 maximum aperture.
Pentax medium format mount. SMC (Super Multi Coating) — 7-layer multi-coating for flare control. Metal construction. Medium format coverage. Manual focus and aperture. Filter thread varies by variant.
Available used at budget to mid-range prices depending on condition and variant. Pentax medium format lenses are generally good value. Check for haze and fungus — decades-old optics are susceptible. Useful for film medium format photographers in the Pentax 645/67 system.