Pentax 67

Overview

The Pentax 67 is a medium-format SLR built around 6×7cm roll film and styled to handle like an oversized 35mm SLR — the so-called "super SLR" design philosophy that distinguishes it from contemporaries like the Mamiya RB67/RZ67 (modular, studio-shaped) and the Hasselblad 500-series (cubic, waist-level by default). First released in 1969 as the Asahi Pentax 6×7, renamed Pentax 67 in 1989 with electronic and cosmetic updates, and finally succeeded by the 67II in 1998, this page covers the original 6×7 / 6×7 MLU / Pentax 67 production run.^[1]

The camera became iconic in landscape, fashion, and editorial photography for its combination of large-negative quality (56×70mm produces a 5:4 image roughly four times the area of 35mm and ~2.3× the area of 6×6) with relatively familiar SLR ergonomics — eye-level shooting, focal-plane shutter, ground-glass focusing through the taking lens, broad lens lineup. Notable users have included landscape photographers Galen Rowell and Christopher Burkett, fashion photographers Mario Testino and Annie Leibovitz, and a generation of medium-format wedding and editorial shooters who valued the camera's relatively quick handling vs. modular alternatives.

Construction and build

The body is large by 35mm SLR standards but compact by medium-format SLR standards. Two body sizes existed across the pre-67II run:

• Pentax 6×7 (1969) — 184 × 101 × 91 mm, body weight ~1.29 kg.
• Pentax 6×7 MLU (1976) and Pentax 67 (1989) — 177 × 101 × 91 mm, body weight ~1.21 kg.^[2]

With the standard plain-prism finder and the SMC Pentax 67 105mm f/2.4 standard lens, total operating weight is approximately 2.3 kg (5.1 lb) — a meaningful weight when shooting handheld for any length of time, but manageable for the kind of photographer drawn to the camera's image quality.

Construction is metal-bodied with leatherette covering, a pentaprism (or interchangeable waist-level finder) on top, a film-advance lever on the right shoulder, and a shutter dial with detents from B / 1s / 1/2s through 1/1000s. Frame counter, ISO/film-speed reminder dial, and shutter-release thread sit where they would on an oversized 35mm SLR.

The "super SLR" design philosophy

The Pentax 67's distinguishing design choice was to render a medium-format camera in the form factor and handling vocabulary of a 35mm SLR. This was unusual at the time:

• Mamiya built modular MF SLRs (RB67 / RZ67) with rotating backs, bellows-style focus, and waist-level finders by default — closer to a small studio camera than a 35mm body.
• Hasselblad's 500-series was the cubic pretty-box by default, with prism finders as accessories — clearly its own form factor.
• Bronica (S2A, ETR series) split the difference between modular and SLR, but stayed visually distinct from 35mm cameras.

Pentax instead built what is essentially a 35mm SLR scaled up — through-the-lens viewing without rotating backs, eye-level operation as default, focal-plane shutter, focus by twisting a ring on the lens. A photographer comfortable with a Pentax Spotmatic or LX could pick up a Pentax 67 and feel mostly at home. This made it the medium-format camera of choice for photographers who wanted the negative size without retraining their hand-eye habits.

6×7 image format and aspect ratio

The Pentax 67 produces images 56 mm × 70 mm on 120 or 220 roll film — a 5:4 aspect ratio. This format choice has practical consequences:

• 5:4 matches 4×5 sheet film proportions — prints, scans, and editorial layouts that work for 4×5 also work for 6×7 without cropping.
• 5:4 matches 8×10 inch print paper without cropping — an 8×10 print of a 6×7 negative is a contact-fit, the same proportion as the negative.
• Negative area ~2.3× larger than 6×6 — meaningfully more grain headroom and more enlargement margin without dropping into significant grain visibility.
• 10 frames per 120 roll, 21 per 220 roll — vs. 12 / 24 on 6×6 and 15 / 30 on 645. The frame count is the cost of the larger image.

The 5:4 aspect ratio is one of the central reasons the camera was favored by landscape photographers — most landscape compositions sit comfortably in 5:4 vs. the slightly elongated 6×7 / 6×9 rectangles or the more cropped 6×6 square.

Mirror mechanism and vibration

The defining mechanical issue of the Pentax 67 family is the mirror. The 6×7 image area requires a substantially larger mirror than a 6×6 or 35mm SLR, and that mirror has to swing up and stop in a few milliseconds before the shutter opens. The result is enough vibration to noticeably soften images at shutter speeds in the rough range of 1/15–1/125 second — the band where the mirror's vibration period overlaps with the exposure window.

Pentax's response, applied mid-production:

• 1976 — mirror lock-up (MLU) added. The "Pentax 6×7 MLU" added a switch on the right side of the mirror housing that pre-fires the mirror, letting it settle before the shutter is tripped. This is the single most useful field accessory the camera ever received.^[2]
• 1989 — Pentax 67 update. Electronic refinements but no additional mirror damping — the basic mirror geometry remained the same.

Working photographers used the Pentax 67 with one of two compensating techniques:

1. MLU + tripod + cable release for shutter speeds 1s through ~1/125s. This is standard practice for landscape and architectural use.
2. Hand-hold at 1/250s or faster where the exposure window is shorter than the mirror's vibration peak. Acceptable for portraiture, fashion, and reportage.

The 67II added an electronic mirror-damping system that meaningfully reduced (but did not eliminate) the issue. Photographers who valued the pre-67II mirror's distinctive "thunk" — its tactile and audible feedback — continued to use the older bodies even after the 67II was available.

Lens system — the Pentax 67 mount

Pentax engineered a dual bayonet mount specific to this body, branded the "Pentax 67" mount. Two concentric bayonet rings serve different focal-length ranges:

• Inner bayonet — 35mm fisheye through 300mm focal lengths.
• Outer bayonet — 400mm through 1000mm focal lengths (the longer/heavier lenses where the larger bayonet diameter provides additional rigidity).

The lens lineup grew over the camera's three-decade life to roughly 20 focal lengths, which Wikipedia describes as "the largest of any medium format system." Notable lenses include:

• SMC Pentax 67 105mm f/2.4 — the standard "normal" lens; widely considered one of the best 105mm MF normals ever made. Often paired with the body as a kit.
• SMC Pentax 67 90mm f/2.8 LS — "leaf-shutter" variant. Body's focal-plane shutter is bypassed; the lens has its own shutter. Enables flash sync at all speeds (vs. 1/30s X-sync of the focal-plane shutter).
• SMC Pentax 67 165mm f/4 LS — second leaf-shutter lens; same flash-sync advantage at portrait length.
• SMC Pentax 67 75mm f/4.5 — wide-normal; popular for environmental portraits.
• SMC Pentax 67 55mm f/4 — moderate wide; classic landscape and architectural focal length.
• SMC Pentax 67 200mm f/4 — short telephoto; common for portraiture.
• SMC Pentax 67 300mm f/4 — long telephoto; the practical limit before the body's mirror clearance becomes problematic for handheld use.
• SMC Pentax 67 1000mm f/8 (Reflex) — the long extreme; mirror-lens design for compact size despite the focal length.

Older lenses are branded "Super-Multi-Coated Takumar 6×7" or "SMC Takumar 6×7" (pre-1979). These are mechanically and optically identical or nearly so to the equivalent SMC Pentax 67 versions; the rebranding was a mid-life cosmetic / nameplate change rather than an optical redesign.

Variants and versions

Within this page's 1969–1998 scope, the following variants existed:

• Asahi Pentax 6×7 (1969) — original. No mirror lock-up. CdS-cell TTL metering prism available as accessory but not built in.
• Honeywell Pentax 6×7 (1969) — US-import nameplate variant of the same camera.
• Asahi Pentax 6×7 MLU (1976) — adds mirror lock-up. Otherwise identical to original.
• Pentax 67 (1989) — modernized body; same basic spec sheet but updated electronics, cosmetic redesign, dropped the "6×7" branding.

The successor Pentax 67II (1998–2009) is on its own page — it's a substantial redesign with a built-in AE prism, dedicated time-mode switch, and electronic mirror damping; the bodies are not interchangeable for accessories like prism finders.

Working notes

• The camera is fully battery-dependent. A 6V PX28 / 4LR44 lithium battery powers the shutter. Without the battery, the shutter does not fire — there's no mechanical fallback. Carry a spare. The MLU mode also drains the battery if left engaged, so flip MLU off when not actively shooting.
• Mirror lock-up is essential for tripod work below 1/250s. This is the single most important technique-level fact about the camera. Photographers who skipped MLU often blamed the lens for soft images that were actually mirror-induced.
• Flash sync at 1/30s is restrictive. For photographers needing fast flash sync (fashion, sports), the leaf-shutter 90mm f/2.8 LS and 165mm f/4 LS lenses are the only path; both are sought-after on the used market because of this.
• Loading 220 takes practice. The pressure plate has a 120/220 selector that must match the film type — wrong setting causes spacing problems on 220 (usually overlapping frames).
• The right-side wood grip is a separate accessory and is not always present on used bodies. The grip improves handheld stability noticeably; bare-bodied operation is workable but less comfortable for extended shooting. The 67II later integrated a fixed grip.
• Mirror return after a no-battery cycle. If the shutter is fired without sufficient battery voltage, a flush button under the "7" in the model name allows the mirror/shutter cycle to be completed manually so the user isn't stuck with a locked-up mirror.

Used market and reliability

The Pentax 67 has aged well as a used camera. Common service items on a 30+ year old body:

• Slow shutter speeds — the cloth focal-plane shutter develops slow-speed timing drift (usually visible at 1s through 1/8s) that requires a CLA (clean, lubricate, adjust) to restore.
• Mirror dampers — the foam dampers in the mirror box deteriorate; replacement is part of any thorough CLA.
• Light seals — body-back light seals also deteriorate; replacement is straightforward.
• Frame spacing irregularities — most common on early 6×7 bodies. The film transport mechanism saw incremental improvements through the production run; the 1989 Pentax 67 is generally regarded as the most reliable pre-67II variant.

Used pricing as of 2026 (US market, body only):

• Pentax 67 (1989) body: $700–1,200 depending on condition and prism inclusion.
• Pentax 6×7 MLU (1976–1989) body: $500–900.
• Pentax 6×7 (1969–1976, no MLU) body: $400–700 — the no-MLU early bodies are functional but practically limited to handheld work.

The SMC Pentax 67 105mm f/2.4 alone trades for $300–600 used and is one of the camera's enduring strong arguments — many users buy a body just to mount this lens.

Related cameras

• Pentax 67II — the 1998–2009 successor with built-in AE prism and mirror damping
• Mamiya RB67 Pro-S — modular 6×7 SLR; rotating back; bellows focus; lens-mounted leaf shutters; closer to a small studio camera than a "super SLR"
• Mamiya RZ67 Pro II — the electronic-shutter modular successor to the RB67
• Bronica GS-1 — Bronica's 6×7 SLR; lighter than the Pentax 67 but with smaller lens lineup
• Hasselblad 500CM — 6×6 cubic SLR; different format (1:1 vs 5:4) and design philosophy