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Pentax 35-70mm f/2.8-3.5 SMC M Lens

The Pentax 35-70mm f/2.8-3.5 is a 35–70mm f/2.8 lens designed for Pentax K mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

Pentax 35-70mm f/2.8-3.5 SMC M Lens

Pentax 35-70mm f/2.8-3.5 SMC M Lens

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Lens Overview — Pentax 35-70mm f/2.8-3.5

The Pentax 35-70mm f/2.8-3.5 SMC M is a manual focus zoom lens covering a standard focal length range from 35mm to 70mm, designed for the Pentax K mount. With a maximum aperture of f/2.8 at the wide end, this full-frame compatible lens offers a respectable light-gathering capability for a zoom of its era. The lens is classified as a standard zoom, making it a practical choice for everyday shooting scenarios where a moderate range of focal lengths is useful without carrying multiple primes.

Weighing in at 400g, it strikes a reasonable balance between build substance and portability. The 49mm filter thread is a compact size that keeps accessory costs modest. As a fully manual focus lens, it requires the shooter to focus by hand, which suits deliberate, considered shooting styles.

There is no image stabilization, so steady technique or adequate shutter speed is important, particularly at the longer end of the zoom range. This lens is compatible with any camera body featuring a Pentax K mount, covering both vintage film bodies and modern Pentax DSLRs, making it a flexible option for those already invested in the Pentax K system.

Key Features — Pentax 35-70mm f/2.8-3.5

35-70mm Standard Zoom: Covers wide-angle through short telephoto in a single lens, useful for travel, portraits, and everyday subjects.

f/2.8 Maximum Aperture: Opens to f/2.8 at the 35mm end, allowing shooting in lower light conditions than most kit zooms of the same era.

Pentax K Mount: Compatible with the full range of Pentax K mount bodies, from vintage film cameras to modern Pentax DSLRs.

Full-Frame Coverage: Image circle covers a full 35mm frame with no vignetting on film or full-frame digital bodies.

SMC Coating: Super Multi-Coated optics reduce flare and ghosting, a hallmark of Pentax's optical quality from this period.

Manual Focus Only: All-manual focus operation suits deliberate shooting workflows and adapts well to mirrorless systems via K-mount adapters.

Lens Specifications — Pentax 35-70mm f/2.8-3.5

Pentax 35-70mm f/2.8-3.5 full specifications
SpecDetail
Use CasesPortrait, Landscape, Street, Travel
Lens TypeZoom
FormatFull Frame
Zoom/PrimeZoom
Focal Length35–70mm
Maximum Aperturef/2.8
Camera SystemDSLR
Lens MountPentax K
AutofocusNo
Focus TypeManual
Image StabilizationNone
Filter Thread49mm

Description — Pentax 35-70mm f/2.8-3.5

The Pentax 35-70mm f/2.8-3.5 SMC M is a Pentax K mount, full-frame compatible zoom lens covering a 35mm to 70mm focal length range — a standard zoom span that handles a wide variety of shooting situations. At the wide end, the lens opens to a maximum aperture of f/2.8, stepping down to f/3.5 at the 70mm end. Focusing is entirely manual, putting full control in the photographer's hands.

The lens weighs 400g and accepts 49mm filters, keeping its footprint practical. With no image stabilization, shooters will want to maintain appropriate shutter speeds for sharp handheld results. The Pentax K mount compatibility means this lens works across the full range of K mount bodies, making it a useful addition to any Pentax K system kit.

Pros — Pentax 35-70mm f/2.8-3.5

  • ✓Maximum aperture of f/2.8 at 35mm provides solid light gathering for a zoom lens
  • ✓Full-frame compatible coverage suits a wide range of Pentax K mount bodies
  • ✓Standard 35–70mm focal length range covers wide, normal, and short telephoto perspectives in one lens

Cons — Pentax 35-70mm f/2.8-3.5

  • ✗Manual focus only — no autofocus support, which may slow workflow in fast-moving situations
  • ✗Variable aperture means maximum aperture narrows from f/2.8 to f/3.5 as you zoom toward 70mm
  • ✗No image stabilization, so handheld shooting in lower light demands careful technique

Videos — Pentax 35-70mm f/2.8-3.5

Pentax SMC 35mm f2.8 - Vintage Lens — Thomas Fransson

Resources & Downloads — Pentax 35-70mm f/2.8-3.5

Manuals & Guides

Frequently Asked Questions — Pentax 35-70mm f/2.8-3.5

What cameras is this lens compatible with?+
This lens is designed for the Pentax K mount and is compatible with any camera body using that mount. It covers full-frame format, so it can be used on both full-frame and crop-sensor Pentax K mount bodies.
Does this lens have autofocus?+
No, this is a manual focus lens. All focusing must be done by hand using the focus ring on the lens barrel.
What is the maximum aperture of this lens?+
The lens has a maximum aperture of f/2.8 at the 35mm end. It features a variable aperture, so the maximum aperture changes as you zoom through the focal length range.
What filter size does this lens accept?+
The filter thread size is 49mm, which is a compact and widely available filter diameter.
Does this lens have image stabilization?+
No, this lens does not include image stabilization. Users should be mindful of shutter speed when shooting handheld, especially at longer focal lengths.

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