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Pentax 55mm f/1.4 DA* SDM Short-Telephoto Lens

The Pentax 55mm f/1.4 SDM is a 55mm f/1.4 lens designed for Pentax K mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

Pentax 55mm f/1.4 DA* SDM Short-Telephoto Lens

Pentax 55mm f/1.4 DA* SDM Short-Telephoto Lens

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Lens Overview — Pentax 55mm f/1.4 SDM

The Pentax 55mm f/1.4 DA* is a prime short-telephoto lens built for the Pentax K mount, designed specifically for APS-C format digital SLR cameras. With a maximum aperture of f/1.4, it gives photographers meaningful control over depth of field and performs well in lower light conditions where slower lenses struggle. The 55mm focal length sits in short-telephoto territory on APS-C bodies, making it a natural choice for portrait work and everyday shooting where a slightly tighter field of view is preferred over a standard focal length.

Autofocus is supported alongside full manual focus capability, giving shooters the flexibility to switch between focusing modes depending on the situation. The lens accepts 58mm filters, which opens up a broad range of compatible accessories. At 375g, it strikes a reasonable balance between build substance and portability — substantial enough to feel well-constructed without becoming a burden during extended use.

The lens is compatible with Pentax K mount camera bodies and is categorized within the DA* lineup, which represents Pentax's higher-tier optical series. There is no image stabilization built into the lens itself, though many Pentax bodies feature in-body stabilization systems. Overall, this is a purposeful prime lens aimed at Pentax DSLR shooters who want a fast aperture in a compact short-telephoto package.

Key Features — Pentax 55mm f/1.4 SDM

55mm f/1.4 Prime Lens: A fixed focal length with a wide maximum aperture for strong subject separation and versatility in lower light.

DA* Optical Series: Part of Pentax's premium Star-series lineup, indicating higher-grade optical construction and build quality standards.

APS-C Format Coverage: Designed specifically for APS-C sensors, where the 55mm focal length gives an equivalent field of view of approximately 84mm.

SDM Autofocus Motor: Supersonic Drive Motor provides quiet, smooth autofocus operation suited to both stills and candid shooting situations.

Autofocus & Manual Focus: Supports both AF and MF modes, giving photographers flexibility to switch focusing control based on the shooting scenario.

Weather-Sealed Construction: DA* lenses feature dust and weather resistance, making this lens suitable for use in challenging outdoor conditions.

Lens Specifications — Pentax 55mm f/1.4 SDM

Pentax 55mm f/1.4 SDM full specifications
SpecDetail
Use CasesStudio
Lens TypePrime
FormatAPS-C
Zoom/PrimePrime
Focal Length55mm
Maximum Aperturef/1.4
Camera SystemDSLR
Lens MountPentax K
AutofocusYes
Focus TypeAuto, Manual
Image StabilizationNone
Filter Thread58mm

Description — Pentax 55mm f/1.4 SDM

The Pentax 55mm f/1.4 DA* is a prime short-telephoto lens designed for APS-C format DSLR cameras using the Pentax K mount. Its f/1.4 maximum aperture is one of its defining characteristics, allowing photographers to work in a wide range of lighting conditions and achieve distinct subject separation from the background. At 55mm, it provides a focal length well suited to portraiture and general-purpose photography on APS-C bodies.

The lens supports both auto and manual focus, offering flexibility across different shooting scenarios. A 58mm filter thread makes it easy to pair with polarizers, ND filters, and other accessories from that common filter size. Weighing in at 375g, it is substantial without being heavy, balancing well on mid-sized DSLR bodies.

There is no image stabilization built into this lens. It belongs to Pentax's DA* series and sits within the standard focal length range category while functioning as a prime optic with no zoom capability.

Pros — Pentax 55mm f/1.4 SDM

  • ✓Wide f/1.4 maximum aperture enables strong background separation and low-light shooting flexibility
  • ✓Supports both autofocus and manual focus, giving shooters full focusing versatility
  • ✓55mm focal length on APS-C format suits portrait and everyday photography

Cons — Pentax 55mm f/1.4 SDM

  • ✗No image stabilization built into the lens — relies entirely on any in-body stabilization the camera body provides
  • ✗APS-C format only — not designed for full-frame bodies
  • ✗Limited to Pentax K mount, restricting compatibility to Pentax DSLR systems

Reviews — Pentax 55mm f/1.4 SDM

Videos — Pentax 55mm f/1.4 SDM

Pentax 16-50mm SDM autofocus not working — MackShack Adventures

Resources & Downloads — Pentax 55mm f/1.4 SDM

Manuals & Guides

Frequently Asked Questions — Pentax 55mm f/1.4 SDM

What camera mount does this lens use?+
The Pentax 55mm f/1.4 DA* uses the Pentax K mount. It is compatible with Pentax K mount DSLR camera bodies.
Is this lens compatible with full-frame Pentax cameras?+
This lens is designed for the APS-C format. It is intended for use with APS-C sensor Pentax DSLR bodies within the Pentax K mount system.
Does this lens have image stabilization?+
No, the lens itself has no image stabilization — the image stabilization specification is listed as None. Any stabilization would need to come from the camera body.
What filter size does this lens accept?+
The lens has a 58mm filter thread, so you will need 58mm filters for use with this lens.
Does this lens support autofocus?+
Yes, autofocus is supported. The lens also supports manual focus, so users can choose between auto and manual focusing modes.
How heavy is this lens?+
The lens weighs 375g, making it manageable for handheld shooting and everyday carry alongside a DSLR body.

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