smc Pentax FA 45mm f/2.8 Medium Format Lens
The Pentax 45mm f/2.8 is a 45mm f/2.8 lens designed for Pentax 645 mount cameras. Used copies start from $176.81 on GearFocus, with buyer protection on every purchase.
smc Pentax FA 45mm f/2.8 Medium Format Lens
Used Pentax 45mm f/2.8 Listings on GearFocus
Lens Overview — Pentax 45mm f/2.8
Key Features — Pentax 45mm f/2.8
Pentax 645 Mount: Native compatibility with the Pentax 645 system ensures full autofocus and metering integration with 645-series bodies.
45mm Wide-Angle Prime: Fixed focal length equivalent to roughly 28mm in 35mm terms, well suited for landscapes, architecture, and environmental portraiture.
f/2.8 Maximum Aperture: A relatively fast aperture for medium format, allowing usable light-gathering capability and moderate background separation.
Autofocus Support: AF motor enables reliable autofocus operation alongside a manual focus option for precise, hands-on control.
Full Medium Format Coverage: Image circle covers the 645 format sensor and film area, with no vignetting on native Pentax 645 bodies.
Compact 264g Build: Notably light for a medium format prime, making it practical for extended handheld shooting sessions.
Lens Specifications — Pentax 45mm f/2.8
| Spec | Detail |
|---|---|
| Use Cases | Studio |
| Lens Type | Prime |
| Format | Medium Format |
| Zoom/Prime | Prime |
| Focal Length | 45mm |
| Maximum Aperture | f/2.8 |
| Camera System | Medium Format |
| Lens Mount | Pentax 645 |
| Autofocus | Yes |
| Focus Type | Auto, Manual |
| Image Stabilization | None |
| Filter Thread | 67mm |
Description — Pentax 45mm f/2.8
The smc Pentax FA 45mm f/2.8 is a prime wide-angle lens built for the Pentax 645 medium format system. With a maximum aperture of f/2.8 and a fixed 45mm focal length, it is designed to handle a variety of wide-angle shooting scenarios, from landscapes to environmental work. The lens weighs just 264g, keeping it manageable relative to the medium format category.
Both autofocus and manual focus are supported, providing operational flexibility across different shooting styles. A 67mm filter thread makes it straightforward to attach standard photographic filters. The lens carries no image stabilization, so steady technique or a tripod is recommended in lower-light handheld situations.
Designed exclusively for the Pentax 645 mount, it integrates natively into the Pentax medium format ecosystem and covers the medium format image circle. For Pentax 645 system users seeking a dedicated wide-angle prime, this lens offers a compelling combination of aperture, weight, and autofocus capability.
Pros — Pentax 45mm f/2.8
- ✓Wide maximum aperture of f/2.8 for a medium format prime, enabling shooting in lower light conditions
- ✓Lightweight at just 264g, notably manageable for a medium format lens
- ✓Supports both autofocus and manual focus, offering shooting flexibility
Cons — Pentax 45mm f/2.8
- ✗No image stabilization, which can be limiting in handheld low-light situations
- ✗Fixed focal length offers no zoom flexibility, requiring lens changes for different compositions
- ✗Compatible only with the Pentax 645 mount, limiting use to that specific system
Videos — Pentax 45mm f/2.8
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