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Pentax 45MM F.2.8 FA SMC 645 Medium Format Lens — main product image
Pentax

Pentax 45MM F.2.8 FA SMC 645 Medium Format Lens

Capture Stunning Wide-Angle Shots with the Pentax 45mm 645N LensThe Pentax 45mm 645N Lens is designed to deliver high-quality, wide-angle images with exceptional clarity. Specifically crafted for use with Pentax 645 cameras, this lens offers precise control and stunning results for both professio...

$528.00*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

Capture Stunning Wide-Angle Shots with the Pentax 45mm 645N Lens

The Pentax 45mm 645N Lens is designed to deliver high-quality, wide-angle images with exceptional clarity. Specifically crafted for use with Pentax 645 cameras, this lens offers precise control and stunning results for both professional and enthusiast photographers.

  • Focal Length: 45mm
  • Aperture: f/2.8
  • Lens Construction: 9 elements / 8 groups
  • Minimum Aperture: 22
  • Angle of View: 76 degrees
  • Focus Adjustment: Automatic, manual
  • Filter Size: 67 mm

Key Features

This 45mm lens is specially designed for use with the Pentax 645N SLR large-format camera body

Features include - minimum aperture - 22

Lens Construction - 9 elements / 8 groups

Angle of View - 76 degrees

Diaphragm - Fully Automatic

Specifications

Brand
Pentax
Focal Length
45mm
Maximum Aperture
F.2.8
Minimum Aperture
22
Lens Mount
Pentax 645 Medium Format
Lens Construction
9 elements / 8 groups
Angle of View
76 degrees
Diaphragm
Fully Automatic

Pros & Cons

👍 Pros

  • This 45mm lens is specifically designed to integrate with the Pentax 645N SLR large-format camera body.
  • It features a fully automatic diaphragm, providing seamless aperture control for consistent exposure.
  • The lens construction consists of 9 elements in 8 groups, a design choice often aimed at optical clarity and aberration correction.
  • With a minimum aperture of 22, this lens offers extensive depth of field control for various photographic needs.
  • The 76-degree angle of view provides a wide perspective, suitable for landscapes, interiors, or general medium format photography.

👎 Cons

  • The lens is exclusively designed for the Pentax 645N SLR large-format camera, limiting its usability to that specific system.
  • While a minimum aperture of 22 is provided, the maximum aperture is only f/2.8, which might be less ideal for extreme low-light conditions compared to faster lenses.
  • Information on internal focusing or weather sealing is not provided, which could be a consideration for certain shooting environments.
  • The description does not specify the lens's weight or dimensions, making it difficult to assess its portability and handling characteristics.
  • Details regarding lens coatings or special optical elements beyond the element/group count are not available.

Frequently Asked Questions

This 45mm lens is specifically designed for use with the Pentax 645N SLR large-format camera body.
The maximum aperture of this Pentax 45mm lens is F2.8.
The lens construction features 9 elements arranged in 8 groups.
Yes, this lens features a fully automatic diaphragm for convenient aperture control during shooting.
This lens provides a 76-degree angle of view, suitable for a broad range of photographic subjects.

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