SMC Pentax-A 645 45mm f/2.8

SMC Pentax-A 645 45mm f/2.8 - Good Condition | Classic Medium Format Wide-Angle Prime for Pentax 645 System

The SMC Pentax-A 645 45mm f/2.8 is a beautifully crafted medium format wide-angle 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 45mm focal length on the Pentax 645 medium format system delivers a natural wide-angle perspective — equivalent to approximately 35mm on full frame — making it an ideal choice for landscapes, architecture, environmental portraits, and street 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 4136592.

Key Features

• 45mm focal length — natural wide-angle 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 lens cap 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 45mm f/2.8 is one of those medium format wide-angle primes that landscape and architecture photographers seek out with genuine enthusiasm. The Super Multi-Coating delivers outstanding contrast and colour accuracy, the f/2.8 aperture gives you excellent low-light capability and pleasing subject separation, and the 35mm equivalent perspective is naturally versatile for a wide range of photographic subjects. A genuine highlight of Pentax’s celebrated 645 medium format system.”

What’s Included

• SMC Pentax-A 645 45mm f/2.8 lens
• Front lens cap

Technical Specifications

• Brand: Pentax
• Model: SMC Pentax-A 645 45mm f/2.8
• Serial Number: SR 4136592
• Mount: Pentax 645
• Film Format: Medium Format (645)
• Focal Length: 45mm
• Full Frame Equivalent: approx. 35mm
• Maximum Aperture: f/2.8
• Minimum Aperture: f/22
• Lens Construction: 7 elements in 6 groups
• Angle of View: 68°
• Minimum Focus Distance: 0.45m
• Filter Thread: 67mm
• Construction: All-metal barrel
• Type: Wide-Angle Lens
• Category: Lenses
• Condition: Good Condition