Mamiya
From Prewar Japan to Medium Format Icon
Mamiya was founded in Tokyo in 1940 by Seiichi Mamiya and Tsunejiro Sugawara, establishing itself in the postwar era as a manufacturer of twin-lens reflex cameras before pivoting toward professional medium format systems. Mamiya's own heritage pages document a trajectory from consumer TLRs to the precision interchangeable-lens systems that became the foundation of its reputation. That pivot toward modularity and system depth defined the company through every subsequent decade.
The Twin-Lens Reflex Years
Through the 1950s and 1960s, Mamiya built a loyal following with twin-lens reflex cameras including the C-series, which became notable for offering interchangeable lens pairs. This was an unusual capability in the TLR category: most competitors locked photographers into a fixed lens, while the Mamiya C models allowed swapping between wide, normal, and telephoto pairs. That engineering ambition, prioritizing flexibility and system depth over simplicity, became a defining trait the company carried forward.
Pivot to Professional 645 and Medium Format Systems
In 1975 Mamiya released the M645, one of the earliest dedicated 645-format (6x4.5 cm) SLR systems. The M645 offered a smaller, lighter alternative to the square 6x6 format then dominant in professional medium format, making the system attractive to portrait, editorial, and wedding photographers who needed the productivity of a motor-driven SLR with film economy. The 645 format produces negatives roughly 3.1 times the area of 35mm, a meaningful image-quality advantage that remained the system's core commercial argument for decades.
The RZ67 and RB67: Studio Workhorses
Alongside its 645 line, Mamiya built two 6x7 cm modular systems that became fixtures in professional studios worldwide: the all-mechanical RB67 (1970) with bellows focusing and swappable mid-roll film backs, and the electronic-shutter RZ67 (1982) with Polaroid back compatibility for instant proofing. The George Eastman Museum's equipment collection reflects how broadly these cameras entered professional practice. Both systems used interchangeable film backs that could be swapped mid-roll, a convenience that remained relevant well into the digital transition.
Mamiya's Core Design Philosophy
Mamiya cameras have consistently been designed around modularity: interchangeable backs, interchangeable finders, and deep lens ranges rather than a single fixed configuration. The company prioritized building complete professional systems rather than standalone cameras. This philosophy meant investing in accessories such as prism finders, waist-level finders, digital backs (when they arrived), and motor drives, so that a single camera body could serve fundamentally different workflows.
The 645 AF and Entry into Autofocus
In the late 1990s Mamiya developed the 645 AF, bringing phase-detection autofocus to a medium format SLR at a time when that capability was rare and technically challenging given the larger mirror box involved. The 645 AF and its successor the 645 AFD positioned Mamiya as an accessible route into autofocus medium format, competing with Hasselblad and Contax in a market that was beginning to accommodate digital scan backs.
Digital Backs and the Shift to Phase One
As scanning and CCD digital backs emerged in the 2000s, Mamiya bodies became popular host platforms because of their widespread professional user base and deep lens mount compatibility with back manufacturers. In 2012 Phase One, the Danish imaging company, acquired Mamiya, merging its medium format digital back expertise with the Mamiya camera body heritage. The combined entity has operated under the Phase One umbrella, with the Mamiya brand continuing on select products and the lens catalog remaining relevant for medium format digital shooters.
The 645 Lens Mount and Its Enduring Ecosystem
The Mamiya 645 mount supports a lens catalog spanning ultra-wide to long telephoto focal lengths, with leaf-shutter prime options that were popular for location work requiring flash sync at any shutter speed. Leaf-shutter lenses synchronize with flash across their full speed range rather than being limited to a mechanical sync speed, a significant advantage for portrait and commercial photographers balancing ambient and strobe light. The mount also accepts macro extensions and bellows, keeping the system capable for technical subjects.
RZ67 Lenses and the 6x7 System
The RZ67 professional system uses a dedicated RZ lens mount distinct from the 645 mount, with focal lengths spanning from 37mm fisheye through 500mm and including shift lenses for architectural correction. The rotating back on the RZ67 body means the camera can be held in one orientation while switching between landscape and portrait framing by rotating the back itself, reducing the need to reorient a heavy studio head. The lenses are leaf-shutter designs, providing full-range flash sync across all shutter speeds.
Reading the Mamiya Model Naming System
Mamiya model names encode format and generation information: numbers such as 645 and 67 describe the nominal film format in centimeters, while the RB and RZ prefixes stand for Rotating Back. Letters appended to the 645 line (M645, 645 Pro, 645 AF, 645 AFD, 645 AFD II, 645 AFD III) indicate generational revisions, with later suffixes adding electronic features, improved mirror damping, or updated digital back compatibility. Understanding this hierarchy helps buyers identify which lenses and accessories are cross-compatible across generations.
Image Quality Characteristics of Mamiya Optics
Mamiya lenses across both the 645 and RZ systems have historically been regarded as resolving and contrasty, optimized for the demands of studio and commercial work where fine detail and tonality matter more than small size. The larger image circle demanded by medium format negatives and backs requires lens designs that maintain even illumination and sharpness to the corners of a larger frame than 35mm lenses must cover. Reviewers note that the Mamiya Sekor lens family demonstrates consistent center-to-edge sharpness at moderate apertures, suited to portraits and product photography.
Who Shoots Mamiya Today
Mamiya equipment spans several distinct current user groups: film photographers attracted to medium format's tonal depth and large negative size continue to use RB67, RZ67, and 645-series bodies, while commercial photographers running Phase One digital back systems use Phase One-branded bodies that share DNA with the Mamiya 645 lineage. A secondary market in used Mamiya bodies is active because the cameras were built robustly and the lenses hold resolution against contemporary standards. Both communities keep demand consistent for Mamiya glass and accessories.
Mamiya in the Context of Medium Format Today
Medium format digital today encompasses mirrorless systems such as Fujifilm GFX alongside Phase One technical camera backs, and the Mamiya legacy is most directly present in the Phase One ecosystem through native lens compatibility. The film bodies retain a following among photographers for whom the larger negative and the deliberate pace of roll-film shooting are features rather than constraints. Consensus among working photographers is that Mamiya systems reward careful, methodical shooting styles and repay that investment with exceptional image tonality.
Frequently Asked Questions
- What is the difference between the Mamiya RB67 and the RZ67?
The RB67 (introduced 1970) is fully mechanical with no battery dependency for its shutter, making it reliable in extreme conditions, while the RZ67 (1982) introduced an electronically controlled shutter, motorized film advance options, and a Polaroid back interface for instant proofing. Both share the rotating back design and use the same physical film backs, but their lenses and electronic accessories are not cross-compatible. Studio photographers who need flash reliability at any shutter speed often favor the RZ67 for its leaf-shutter lenses that sync across their full speed range.
- Can I use Mamiya 645 lenses on a Phase One digital back?
Phase One acquired Mamiya in 2012, and Phase One's current IQ-series digital backs are compatible with Mamiya 645 AF mount lenses either natively or via adapter depending on the specific Phase One body in question. Earlier Mamiya 645 AF and AFD bodies accept Mamiya Sekor AF lenses directly and can host Phase One digital backs through the standard 645 back interface. Buyers should verify current compatibility charts from Phase One before purchasing, as the precise set of supported lenses can vary by body generation.
- Is Mamiya good for film photography beginners exploring medium format?
The Mamiya 645 Pro and 645 Pro TL are frequently recommended entry points for medium format film because used bodies are available at accessible prices, the 645 format is forgiving to expose and scan, and the SLR-style design with eye-level prism finders is intuitive for photographers moving up from 35mm. The RB67 is larger and fully mechanical, which some beginners prefer for its tactile simplicity, though its size and weight require deliberate handling. Both lines have active communities, abundant instructional resources, and a healthy supply of affordable used lenses.
- What film formats do Mamiya cameras use?
Mamiya cameras use 120 and 220 roll film: the 645 series exposes frames at 6x4.5 cm (15 exposures per 120 roll), while the RB67 and RZ67 expose frames at 6x7 cm (10 exposures per 120 roll). The 220 film variant is double-length and lacks the paper backing of 120 film, so dedicated 220 magazine backs must be used rather than standard 120 backs. Availability of 220 film has declined significantly and most current film shooters use 120 exclusively, which is widely stocked by specialty retailers worldwide.
- What does leaf shutter mean on Mamiya lenses and why does it matter for flash photography?
A leaf shutter is a mechanism built into the lens itself, consisting of overlapping metal blades that expose the entire frame simultaneously rather than via a travelling curtain, which means flash synchronizes at any shutter speed up to the lens maximum (typically 1/400s to 1/500s on Mamiya designs). Focal-plane shutters in most SLR bodies are limited to a sync speed of 1/125s to 1/250s, so leaf-shutter lenses offer a significant advantage when mixing strobe with bright ambient light. For portrait and commercial photographers, that higher sync ceiling allows them to overpower ambient exposure while the strobe still freezes the subject cleanly.
- How does the Mamiya rotating back work and what is its practical benefit?
On the RB67 and RZ67, the film back attaches to a rotating mechanism on the rear of the camera that can be indexed between landscape and portrait orientation. The practical benefit is that the photographer does not need to tilt a mounted camera on a studio head to switch between frame orientations. For a heavy camera on a large studio stand or copy stand, rotating the back by hand is significantly easier than repositioning the entire camera and tripod head, and it preserves the precise composition already achieved on the groundglass.