SMC Pentax-A 645 55mm f/2.8

SMC Pentax-A 645 55mm f/2.8 - Good Condition | Classic Medium Format Standard Prime for Pentax 645 System

The SMC Pentax-A 645 55mm f/2.8 is a beautifully crafted medium format standard prime from Pentax’s celebrated 645 system lens lineup — a sharp, fast, and highly capable optic that delivers exceptional image quality with the natural rendering quality that SMC Pentax glass is universally renowned for. The 55mm focal length on the Pentax 645 medium format system delivers a natural standard perspective — equivalent to approximately 43mm on full frame — making it the ideal everyday lens for portraits, street, and general photography. The SMC (Super Multi-Coating) delivers exceptional contrast, colour accuracy, and flare resistance, while the solid all-metal construction and smooth focus ring provide a tactile shooting experience of the highest quality. In Pentax 645 mount, it pairs naturally with the full range of Pentax 645 and 645N medium format bodies. Serial number SR 4029147.

Key Features

• 55mm focal length — natural standard perspective for the Pentax 645 medium format system
• Fast f/2.8 maximum aperture for outstanding medium format low-light performance and beautiful background separation
• SMC (Super Multi-Coating) for exceptional contrast, colour accuracy, and flare resistance
• Pentax 645 mount — compatible with all Pentax 645 and 645N medium format bodies
• Manual focus operation with smooth, well-damped focus ring
• Solid all-metal construction of the highest quality
• A genuine classic from Pentax’s celebrated 645 medium format system
• Front and rear lens caps included

Condition Report

• Body: Good condition — light marks consistent with age and use, no cracks or damage to barrel or mount
• Optics: Elements clean and clear — no fungus, haze, or significant dust; SMC coatings intact
• Mechanics: Focus ring operates smoothly and precisely; aperture blades clean and snappy; mount clean and secure

“The SMC Pentax-A 645 55mm f/2.8 is one of those medium format standard primes that photographers seek out with genuine enthusiasm. The Super Multi-Coating delivers outstanding contrast and colour accuracy, the f/2.8 aperture gives you beautiful subject separation and impressive low-light capability for a medium format lens, and the all-metal construction is simply exceptional. A genuine highlight of Pentax’s celebrated 645 medium format system.”

What’s Included

• SMC Pentax-A 645 55mm f/2.8 lens
• Front and rear lens caps

Technical Specifications

• Brand: Pentax
• Model: SMC Pentax-A 645 55mm f/2.8
• Serial Number: SR 4029147
• Mount: Pentax 645
• Film Format: Medium Format (645)
• Focal Length: 55mm
• Full Frame Equivalent: approx. 43mm
• Maximum Aperture: f/2.8
• Minimum Aperture: f/22
• Lens Construction: 6 elements in 5 groups
• Angle of View: 56°
• Minimum Focus Distance: 0.45m
• Filter Thread: 67mm
• Construction: All-metal barrel
• Type: Prime Lens
• Category: Lenses
• Condition: Good Condition