smc FA 645 55-110mm f/5.6 Zoom Lens
The Pentax 645 55-110mm f/5.6 is a 55–110mm f/5.6 lens designed for Pentax 645 mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
smc FA 645 55-110mm f/5.6 Zoom Lens
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Lens Overview — Pentax 645 55-110mm f/5.6
Key Features — Pentax 645 55-110mm f/5.6
55-110mm Telephoto Zoom: Covers a useful telephoto range on the Pentax 645 system, equivalent to roughly 43-87mm in 35mm terms, suitable for portraits and mid-range telephoto work.
Pentax 645 Mount: Designed exclusively for the Pentax 645 medium format system, ensuring full compatibility with 645 film and digital bodies.
Medium Format Coverage: Engineered to cover the larger image circle of the 645 format, delivering the increased detail and tonal depth medium format is known for.
Autofocus Support: Built-in autofocus motor provides convenient automatic focusing on compatible Pentax 645 bodies without sacrificing medium format image quality.
Constant f/5.6 Aperture: The maximum aperture stays fixed at f/5.6 throughout the zoom range, giving predictable and consistent exposure settings at any focal length.
82mm Filter Thread: The large 82mm front thread accommodates a wide range of filters, consistent with the larger optics required for medium format coverage.
Lens Specifications — Pentax 645 55-110mm f/5.6
| Spec | Detail |
|---|---|
| Use Cases | Studio |
| Lens Type | Zoom |
| Format | Medium Format |
| Zoom/Prime | Zoom |
| Focal Length | 55–110mm |
| Maximum Aperture | f/5.6 |
| Camera System | Medium Format |
| Lens Mount | Pentax 645 |
| Autofocus | Yes |
| Focus Type | Auto |
| Image Stabilization | None |
| Filter Thread | 82mm |
Description — Pentax 645 55-110mm f/5.6
The Pentax smc FA 645 55-110mm f/5.6 is a telephoto zoom lens purpose-built for the Pentax 645 medium format camera system. It spans a focal length range of 55mm to 110mm and maintains a consistent maximum aperture of f/5.6 throughout. Autofocus is supported, offering a practical shooting experience for medium format users who prefer not to rely on manual focus techniques.
The lens features an 82mm filter thread, accommodating a broad selection of filters suited to professional and enthusiast use. At 500g, it remains reasonably portable for a medium format zoom. There is no image stabilization, so users should plan accordingly when shooting at slower shutter speeds or longer focal lengths.
Designed exclusively for the Pentax 645 mount, this lens integrates seamlessly into the Pentax 645 ecosystem and is well-suited to photographers seeking telephoto zoom versatility within that system.
Pros — Pentax 645 55-110mm f/5.6
- ✓Autofocus support makes it convenient for medium format shooting without the need for manual focus adjustment
- ✓Covers a useful 55-110mm telephoto zoom range on the Pentax 645 system
- ✓Large 82mm filter thread accommodates a wide range of filters for medium format work
Cons — Pentax 645 55-110mm f/5.6
- ✗Maximum aperture of f/5.6 is modest, limiting performance in lower light conditions
- ✗No image stabilization, requiring careful technique or faster shutter speeds to avoid camera shake
- ✗Restricted exclusively to the Pentax 645 mount, limiting compatibility to that specific medium format system
Videos — Pentax 645 55-110mm f/5.6
PENTAX 645N & smc FA 55 - 110 mm f/ 5.6 Lens #258F — finegoal /