Pentax's medium format shift lens — 75mm f/4.5 with perspective correction for the 645 system.
The Pentax SMC 645 Shift 75mm f/4.5 is a perspective-control shift prime for Pentax 645 medium-format, providing approximately 46mm full-frame equivalent on 6×4.5cm format. Approximately 10 elements in 8 groups. 72mm filter thread. At approximately 810g. Plus/minus 14mm shift. Manual focus.
Approximately 10 elements. The 72mm filter thread. At approximately 810g. Plus/minus 14mm shift. Manual focus only. f/4.5 maximum aperture. Pentax 645 medium-format mount.
The 645 Shift 75mm provides perspective correction for Pentax 645 medium-format architecture photography: the 14mm shift at 75mm on the 6×4.5cm format enables significant converging-vertical correction. The Pentax 645 system's larger image circle amplifies the effect of perspective control relative to smaller formats.
On the used market the Pentax SMC 645 Shift 75mm f/4.5 is available as a specialist medium-format shift prime. Condition checks: shift mechanism smoothness and lock, 72mm front element for marks. Manual focus only. Compatible with Pentax 645 mount bodies.