Pentax 300mm f/4 SMC Lens — Specs, Reviews, Used Prices

Pentax 67 300mm f/4 SMC

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Lens Overview — Pentax 300mm f/4 SMC

The Pentax 67 300mm f/4 SMC is a manual focus telephoto prime lens built specifically for the Pentax 67 medium format system. Designed for photographers working with medium format cameras on the Pentax 67 mount, this lens offers a 300mm focal length and a maximum aperture of f/4, making it a solid choice for subjects that demand reach combined with medium format image quality. As a prime lens, it delivers a fixed 300mm perspective with no zoom compromise, which is well suited to portraiture, wildlife, and other telephoto applications where medium format rendering is a priority.

Focusing is entirely manual, placing full control in the hands of the photographer — a trait that many medium format shooters actively prefer for the deliberate, measured shooting style the format encourages. The lens accepts 82mm filters, a generous thread size consistent with its telephoto focal length and f/4 aperture. Weighing in at 1,230g, this is a substantial piece of glass, as expected from a medium format telephoto prime of this specification.

No image stabilization is present, which is worth factoring in when shooting handheld at slower shutter speeds. Overall, it is a purposeful, format-native telephoto option for the Pentax 67 system.

Key Features — Pentax 300mm f/4 SMC

300mm Medium Format Prime: Fixed 300mm focal length on the Pentax 67 system delivers substantial telephoto reach with the rendering characteristics of medium format.

f/4 Maximum Aperture: A reasonably wide opening for a medium format telephoto prime, useful for subject separation and shooting in lower light conditions.

Pentax 67 Native Mount: Designed specifically for the Pentax 67 system, ensuring full mechanical compatibility with Pentax 67 and 67II bodies.

SMC Optical Coating: Super-Multi-Coating reduces flare and ghosting, improving contrast and color fidelity in backlit or high-contrast scenes.

Manual Focus Only: Full manual focus control suits the deliberate, measured shooting workflow that medium format photography typically demands.

82mm Filter Thread: Large 82mm filter diameter accommodates standard filters including polarizers and ND filters for this focal length and aperture combination.

Lens Specifications — Pentax 300mm f/4 SMC

Pentax 300mm f/4 SMC full specifications
Spec	Detail
Use Cases	Wildlife, Landscape, Portrait
Lens Type	Telephoto
Format	Medium Format
Zoom/Prime	Prime
Focal Length	300mm
Maximum Aperture	f/4
Camera System	Medium Format
Lens Mount	Pentax 67
Autofocus	No
Focus Type	Manual
Image Stabilization	None
Filter Thread	82mm
Weight	1230g

Description — Pentax 300mm f/4 SMC

The Pentax 67 300mm f/4 SMC is a 300mm telephoto prime lens built for the Pentax 67 medium format mount. With a maximum aperture of f/4 and a manual focus design, it caters to medium format photographers who value precise control and a fixed focal length perspective. The lens features an 82mm filter thread and weighs 1,230g, reflecting the substantial optical construction expected of a medium format telephoto at this focal length.

With no image stabilization, it is best suited to use on a tripod or in conditions where a fast enough shutter speed can be maintained. As a format-native prime, it is purpose-built for the Pentax 67 system and offers a straightforward, no-compromise telephoto option for photographers already invested in that ecosystem.

Pros — Pentax 300mm f/4 SMC

✓300mm focal length on a dedicated Pentax 67 medium format mount delivers significant telephoto reach in the medium format system
✓Maximum aperture of f/4 provides a reasonably wide opening for a 300mm medium format telephoto prime
✓Prime lens design at a fixed 300mm focal length ensures optical consistency with no zoom-related compromises
✓82mm filter thread allows use of standard large-format filters
✓Fully manual focus operation suits the deliberate shooting workflow typical of medium format photography

Cons — Pentax 300mm f/4 SMC

✗No image stabilization, which can be a challenge when shooting handheld at 300mm
✗Manual focus only — there is no autofocus capability, which limits spontaneous or fast-action shooting
✗At 1,230g, the lens is heavy and will add significant weight to a medium format kit
✗Compatible exclusively with the Pentax 67 mount, limiting use to that specific camera system

Frequently Asked Questions — Pentax 300mm f/4 SMC

What camera system is this lens compatible with?+

This lens is designed exclusively for the Pentax 67 mount, as specified in its mount data. It is a medium format lens intended for the Pentax 67 camera system and is not natively compatible with other mounts.

Does this lens have autofocus?+

No. The Pentax 67 300mm f/4 SMC is a manual focus only lens. Photographers must focus by hand, which suits the careful, considered approach common in medium format shooting.

What filter size does this lens use?+

The lens has an 82mm filter thread size, allowing use of 82mm screw-in filters for effects such as polarization or neutral density.

Does the lens include image stabilization?+

No. The specifications confirm that image stabilization is not present on this lens. Photographers shooting handheld should account for this, particularly at the 300mm focal length.

How heavy is this lens?+

The lens weighs 1,230g according to the specifications. This is a substantial weight and should be considered when planning handheld use or travel with this lens.

Is this a zoom or prime lens?+

This is a prime lens with a fixed focal length of 300mm. There is no zoom capability — the focal length is fixed at 300mm.

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