Guides · 12 min
Mamiya RB67 vs RZ67: Which System Should You Choose?
Compare the Mamiya RB67 and RZ67 systems, from shutters and batteries to lenses, film backs, weight and real-world handling.
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Guides · 12 min
Compare the Mamiya RB67 and RZ67 systems, from shutters and batteries to lenses, film backs, weight and real-world handling.
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The Mamiya RB67 Professional and Mamiya RZ67 Professional are modular 6×7 medium-format camera systems built around interchangeable lenses, film holders, finders and revolving backs.
They look closely related because they share the same basic studio-camera concept. Their operating philosophies, however, are different.
The RB67 is primarily mechanical, while the RZ67 adds electronic shutter control, a faster integrated winding sequence and support for electronic accessories.
Both can produce a 56 × 69.5mm frame on 120 roll film. Both use rack-and-pinion bellows focusing. Both allow the photographer to rotate the film holder between horizontal and vertical framing without turning the camera body.
The best choice therefore depends less on picture quality than on how much automation, battery dependence and cross-system compatibility you want.
Mamiya introduced the RB67 series in 1970.
Its main design combined a large 6×7 frame, interchangeable film holders, lens-mounted leaf shutters and a revolving rear assembly. Bellows focusing allowed close focusing without placing a helical focusing mechanism in every lens.
The RB line eventually included three principal bodies:
The Pro-S added operating safeguards and refinements. The Pro-SD later received a larger 61mm lens opening, permitting use of additional K/L and L-series optics.
The RZ67 followed in 1982 as an electro-mechanical development of the same general concept.
Its principal bodies are:
The RZ retained the revolving rear assembly and bellows focusing while adding electronic communication between body, lens, film holder and certain finders.
For buyers, the exact body generation matters. Accessories bearing similar names do not always provide identical functions across every version.
| Characteristic | Mamiya RB67 Pro-SD | Mamiya RZ67 Pro II |
|---|---|---|
| Main operating principle | Mechanical | Electro-mechanical |
| Default film format | 6×7 on 120 roll film | 6×7 on 120 roll film |
| Recorded frame | 56 × 69.5mm | 56 × 69.5mm |
| Frames per 120 roll | 10 | 10 |
| Focusing | Rack-and-pinion bellows | Rack-and-pinion bellows with fine-focus control |
| Maximum bellows extension | 46mm | 46mm |
| Reference lens in manual | 127mm f/3.5 K/L | 110mm f/2.8 |
| Shutter control | Mechanical leaf shutter in lens | Electronic leaf shutter in RZ lens |
| Normal shutter-speed range | 1–1/400 second plus T | 8–1/400 second with intermediate speeds, plus B and T |
| Battery required for normal operation | No | Yes, one 4LR44 or 4SR44 |
| Emergency mechanical speed | Normal mechanical range | 1/400 second only |
| Revolving rear assembly | Yes | Yes |
| Reference configured weight | About 2,690g | About 2,490g |
The weight figures come from the manufacturers' reference configurations. The RB figure includes a 127mm f/3.5 lens, while the RZ figure includes a 110mm f/2.8 lens. They should not be treated as body-only measurements.
The practical conclusion is that neither system is light. The RZ reference kit is about 200g lighter, but lens, finder, holder and grip choices can reverse or enlarge that difference.
The greatest difference is how the shutter is controlled.
RB lenses contain mechanically timed leaf shutters.
The selected shutter speed is controlled on the lens, and the camera does not need a battery for normal operation.
The RB67 body uses a side lever to cock the mirror and lens shutter. Film advancement takes place through the lever on the attached holder.
This divides the sequence into separate actions:
The process is deliberate, but it also makes the operating state visible to an experienced user.
RZ lenses use electronically controlled leaf shutters.
On the RZ67 Pro II, a single 114-degree stroke advances the film and counter, prepares the mirror and light baffle, and cocks the shutter.
The body also supplies warning lamps, audible alerts and release interlocks for conditions such as an inserted dark slide, incomplete cocking or an incorrect control position.
Normal operation requires a 6V 4LR44 or 4SR44 battery.
The system provides one mechanical 1/400-second fallback speed, but that fallback does not reproduce the camera's normal electronic functions.
Choose the RB approach if battery independence and fully manual control are priorities.
Choose the RZ approach if you value a more integrated winding sequence, longer electronically timed exposures and electronic safeguards.
Mechanical operation should not be confused with immunity from failure. RB bodies and lenses still contain shutters, gears, springs, bellows and lubricated mechanisms that require inspection and maintenance.
Likewise, electronic control does not make every RZ unreliable. Condition, storage history and service quality matter more than broad assumptions about either design.
Both systems place a leaf shutter inside each lens.
This allows X synchronization across the shutter-speed range when the camera, lens and strobe equipment are functioning correctly.
The RB67 Pro-SD manual specifies mechanical speeds from 1 second to 1/400 second, plus a time-exposure position.
The RZ67 Pro II provides electronically timed speeds from 8 seconds to 1/400 second, including intermediate values. It also provides B and T modes.
That difference can matter in controlled lighting.
The RZ offers more flexibility for long exposures without requiring the photographer to time every exposure externally. An appropriate metered prism can also provide aperture-priority control.
The RB remains straightforward for strobe-lit studio work because its lens shutters do not depend on body power.
Before connecting older studio strobes to an RZ67, check trigger voltage. Mamiya's RZ67 Pro II manual warns that high-voltage sync circuits can damage the camera's electronics.
Both cameras produce 10 exposures on a typical 120 film holder in the 6×7 format.
The rear assembly rotates through 90 degrees so the photographer can change between horizontal and vertical framing without placing the camera on its side.
Finder masks indicate the active orientation.
This is useful when the camera is mounted on a tripod, camera stand or other fixed support.
The RB system includes holders for several film types and frame formats.
Compatibility depends on the body, revolving adapter and holder generation. The Pro-SD accepts its matching holders directly and supports several earlier RB holders through the appropriate mounting arrangement.
RZ holders communicate film-speed information electronically with the body and compatible metered finders.
The RZ67 Pro II manual lists holders for 120 and 220 roll film, 6×4.5 and instant-film options. Other holder formats were also offered within the wider system.
Certain RB holders can be attached to an RZ body through a G Adapter, but electronic communication and exposure safeguards may not remain available.
Do not assume that any holder carrying an RB67 or RZ67 label will provide every function on every body. Check the exact holder, insert, adapter and camera generation together.
Compatibility is directional.
Many RB lenses can be mounted on an RZ67 Pro II, subject to important operating conditions.
Mamiya instructs the user to:
The body's distance scale is not valid with an RB lens because the two lens series use different flange-back dimensions.
Certain Mamiya Sekor C lenses also require the appropriate interchange mounting ring for reliable coupling. Mamiya advised checking older RB lenses before use because shutter torque may not suit the RZ mechanism.
No, not as a normally functioning lens.
RZ lenses depend on electronic communication and shutter control supplied by an RZ body. An RB body does not provide that interface.
This asymmetry gives the RZ an advantage for someone who wants access to both RZ optics and compatible RB lenses.
An RB owner should build the system around RB-compatible C, K/L and L lenses, while checking the body-specific adapter-ring requirements.
The RB67 Pro-SD manual uses the Mamiya Sekor 127mm f/3.5 K/L as its reference lens.
Other documented RB-system options include the Mamiya Sekor 90mm f/3.5 K/L, 75mm shift, macro, short-telephoto and long-focus lenses.
The RZ67 Pro II manual uses the Mamiya Sekor Z 110mm f/2.8 W as its reference lens.
The RZ line also includes the Mamiya Sekor Z 50mm f/4.5 W, Mamiya Sekor Z 65mm f/4 W, macro, shift, short-telephoto and long-focus options.
The 110mm f/2.8 is one of the RZ system's practical attractions. It combines a moderate field of view with a larger maximum aperture than the RB reference lens.
That does not make every RZ lens optically preferable to every RB lens. Compare the exact lens design, condition and intended use.
Both systems focus by extending a built-in bellows.
Maximum extension is 46mm in the cited manuals.
Bellows focusing provides two important advantages:
The RZ67 Pro II adds a fine-focus knob to the main focusing controls.
At close distances, bellows extension changes effective exposure. Both systems provide scales to help determine the required exposure correction.
When an RB lens is mounted on an RZ body, use the focusing screen for confirmation because the RZ body scale does not correspond to that lens configuration.
For macro work, also inspect the bellows carefully. Pinholes, separation or stiffness can compromise both exposure and focusing movement.
Neither camera is intended to behave like a small 35mm body.
The reference RB67 Pro-SD configuration weighs approximately 2.69kg. The reference RZ67 Pro II configuration weighs approximately 2.49kg.
Add a prism finder, grip, longer lens or motorized holder and the working weight rises quickly.
The RB's separate body-cocking and film-advance actions encourage a slower rhythm.
Its controls can be attractive to photographers who prefer direct mechanical feedback and do not mind checking each stage of the sequence.
The RZ combines more of the preparation sequence into one lever stroke.
Electronic warnings reduce some common operating mistakes, and the option of an AE prism can accelerate changing-light work.
Both can be used without a tripod, particularly with a waist-level finder and a suitable strap.
For extended sessions, close focusing, long lenses or slow shutter speeds, stable support is usually more practical.
The revolving rear assembly is especially valuable on support because vertical framing does not require turning the entire camera.
A recently serviced RB67 with a clean lens and reliable holder may be a better purchase than an RZ with corrosion or intermittent electronics.
A tested RZ67 with healthy contacts, accurate shutters and a clean battery compartment may be more dependable than a neglected mechanical body.
The correct comparison is between the actual kits available, not only between their model names.
Before buying either system, inspect every component as an individual item.
No. Normal RB67 operation is mechanical, including the lens shutters. A metered finder may require its own power source.
Normal RZ67 operation requires a 4LR44 or 4SR44 battery. The RZ67 Pro II provides a mechanical 1/400-second fallback, but that single speed does not replace normal electronic operation.
Many RB lenses can be used on an RZ67 under the conditions described by Mamiya. The body dial must be placed at RBL, shutter speed is selected on the lens, and the bellows must be extended by about 7mm for infinity focus.
No. RZ lenses require electronic control that the RB body does not provide.
Not universally. Certain RB holders can be attached to an RZ through the appropriate G Adapter, but electronic communication and safeguards may be unavailable. Check the exact body, holder, insert and adapter.
In the manufacturers' cited reference configurations, the RZ67 Pro II weighs about 2.49kg and the RB67 Pro-SD about 2.69kg. Different lenses and finders can alter that comparison.
The cited roll-film holders for both systems record a 56 × 69.5mm frame and provide 10 exposures per roll.
Both are highly capable. The RZ offers a 110mm f/2.8 reference lens, integrated winding and optional electronic exposure support. The RB provides battery-independent mechanical operation. Condition and workflow should decide.
Both use leaf shutters and can synchronize studio strobes across their normal shutter-speed ranges. With an RZ body, verify that older lighting equipment has a safe trigger voltage.
The Mamiya RB67 and RZ67 share the same core 6×7 studio-camera idea, but they deliver it through different control systems.
The RB67 emphasizes mechanical operation, battery independence and a deliberate working sequence.
The RZ67 adds electronic shutter timing, integrated winding, operating warnings and access to both RZ optics and selected RB lenses.
Neither is automatically the better camera.
Choose the RB when mechanical autonomy and an existing RB kit matter most. Choose the RZ when electronic control, faster preparation and broader directional lens compatibility better match your work.
Before buying, compare the complete kit: body generation, lens, holder, insert, finder, adapter, battery condition and maintenance history.
Explore the Mamiya camera records in Camera_DATA and compare specific bodies and lenses before assembling a system.
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The Mamiya RB67 Professional and Mamiya RZ67 Professional are modular 6×7 medium-format camera systems built around interchangeable lenses, film holders, finders and revolving backs.
They look closely related because they share the same basic studio-camera concept. Their operating philosophies, however, are different.
The RB67 is primarily mechanical, while the RZ67 adds electronic shutter control, a faster integrated winding sequence and support for electronic accessories.
Both can produce a 56 × 69.5mm frame on 120 roll film. Both use rack-and-pinion bellows focusing. Both allow the photographer to rotate the film holder between horizontal and vertical framing without turning the camera body.
The best choice therefore depends less on picture quality than on how much automation, battery dependence and cross-system compatibility you want.
Mamiya introduced the RB67 series in 1970.
Its main design combined a large 6×7 frame, interchangeable film holders, lens-mounted leaf shutters and a revolving rear assembly. Bellows focusing allowed close focusing without placing a helical focusing mechanism in every lens.
The RB line eventually included three principal bodies:
The Pro-S added operating safeguards and refinements. The Pro-SD later received a larger 61mm lens opening, permitting use of additional K/L and L-series optics.
The RZ67 followed in 1982 as an electro-mechanical development of the same general concept.
Its principal bodies are:
The RZ retained the revolving rear assembly and bellows focusing while adding electronic communication between body, lens, film holder and certain finders.
For buyers, the exact body generation matters. Accessories bearing similar names do not always provide identical functions across every version.
| Characteristic | Mamiya RB67 Pro-SD | Mamiya RZ67 Pro II |
|---|---|---|
| Main operating principle | Mechanical | Electro-mechanical |
| Default film format | 6×7 on 120 roll film | 6×7 on 120 roll film |
| Recorded frame | 56 × 69.5mm | 56 × 69.5mm |
| Frames per 120 roll | 10 | 10 |
| Focusing | Rack-and-pinion bellows | Rack-and-pinion bellows with fine-focus control |
| Maximum bellows extension | 46mm | 46mm |
| Reference lens in manual | 127mm f/3.5 K/L | 110mm f/2.8 |
| Shutter control | Mechanical leaf shutter in lens | Electronic leaf shutter in RZ lens |
| Normal shutter-speed range | 1–1/400 second plus T | 8–1/400 second with intermediate speeds, plus B and T |
| Battery required for normal operation | No | Yes, one 4LR44 or 4SR44 |
| Emergency mechanical speed | Normal mechanical range | 1/400 second only |
| Revolving rear assembly | Yes | Yes |
| Reference configured weight | About 2,690g | About 2,490g |
The weight figures come from the manufacturers' reference configurations. The RB figure includes a 127mm f/3.5 lens, while the RZ figure includes a 110mm f/2.8 lens. They should not be treated as body-only measurements.
The practical conclusion is that neither system is light. The RZ reference kit is about 200g lighter, but lens, finder, holder and grip choices can reverse or enlarge that difference.
The greatest difference is how the shutter is controlled.
RB lenses contain mechanically timed leaf shutters.
The selected shutter speed is controlled on the lens, and the camera does not need a battery for normal operation.
The RB67 body uses a side lever to cock the mirror and lens shutter. Film advancement takes place through the lever on the attached holder.
This divides the sequence into separate actions:
The process is deliberate, but it also makes the operating state visible to an experienced user.
RZ lenses use electronically controlled leaf shutters.
On the RZ67 Pro II, a single 114-degree stroke advances the film and counter, prepares the mirror and light baffle, and cocks the shutter.
The body also supplies warning lamps, audible alerts and release interlocks for conditions such as an inserted dark slide, incomplete cocking or an incorrect control position.
Normal operation requires a 6V 4LR44 or 4SR44 battery.
The system provides one mechanical 1/400-second fallback speed, but that fallback does not reproduce the camera's normal electronic functions.
Choose the RB approach if battery independence and fully manual control are priorities.
Choose the RZ approach if you value a more integrated winding sequence, longer electronically timed exposures and electronic safeguards.
Mechanical operation should not be confused with immunity from failure. RB bodies and lenses still contain shutters, gears, springs, bellows and lubricated mechanisms that require inspection and maintenance.
Likewise, electronic control does not make every RZ unreliable. Condition, storage history and service quality matter more than broad assumptions about either design.
Both systems place a leaf shutter inside each lens.
This allows X synchronization across the shutter-speed range when the camera, lens and strobe equipment are functioning correctly.
The RB67 Pro-SD manual specifies mechanical speeds from 1 second to 1/400 second, plus a time-exposure position.
The RZ67 Pro II provides electronically timed speeds from 8 seconds to 1/400 second, including intermediate values. It also provides B and T modes.
That difference can matter in controlled lighting.
The RZ offers more flexibility for long exposures without requiring the photographer to time every exposure externally. An appropriate metered prism can also provide aperture-priority control.
The RB remains straightforward for strobe-lit studio work because its lens shutters do not depend on body power.
Before connecting older studio strobes to an RZ67, check trigger voltage. Mamiya's RZ67 Pro II manual warns that high-voltage sync circuits can damage the camera's electronics.
Both cameras produce 10 exposures on a typical 120 film holder in the 6×7 format.
The rear assembly rotates through 90 degrees so the photographer can change between horizontal and vertical framing without placing the camera on its side.
Finder masks indicate the active orientation.
This is useful when the camera is mounted on a tripod, camera stand or other fixed support.
The RB system includes holders for several film types and frame formats.
Compatibility depends on the body, revolving adapter and holder generation. The Pro-SD accepts its matching holders directly and supports several earlier RB holders through the appropriate mounting arrangement.
RZ holders communicate film-speed information electronically with the body and compatible metered finders.
The RZ67 Pro II manual lists holders for 120 and 220 roll film, 6×4.5 and instant-film options. Other holder formats were also offered within the wider system.
Certain RB holders can be attached to an RZ body through a G Adapter, but electronic communication and exposure safeguards may not remain available.
Do not assume that any holder carrying an RB67 or RZ67 label will provide every function on every body. Check the exact holder, insert, adapter and camera generation together.
Compatibility is directional.
Many RB lenses can be mounted on an RZ67 Pro II, subject to important operating conditions.
Mamiya instructs the user to:
The body's distance scale is not valid with an RB lens because the two lens series use different flange-back dimensions.
Certain Mamiya Sekor C lenses also require the appropriate interchange mounting ring for reliable coupling. Mamiya advised checking older RB lenses before use because shutter torque may not suit the RZ mechanism.
No, not as a normally functioning lens.
RZ lenses depend on electronic communication and shutter control supplied by an RZ body. An RB body does not provide that interface.
This asymmetry gives the RZ an advantage for someone who wants access to both RZ optics and compatible RB lenses.
An RB owner should build the system around RB-compatible C, K/L and L lenses, while checking the body-specific adapter-ring requirements.
The RB67 Pro-SD manual uses the Mamiya Sekor 127mm f/3.5 K/L as its reference lens.
Other documented RB-system options include the Mamiya Sekor 90mm f/3.5 K/L, 75mm shift, macro, short-telephoto and long-focus lenses.
The RZ67 Pro II manual uses the Mamiya Sekor Z 110mm f/2.8 W as its reference lens.
The RZ line also includes the Mamiya Sekor Z 50mm f/4.5 W, Mamiya Sekor Z 65mm f/4 W, macro, shift, short-telephoto and long-focus options.
The 110mm f/2.8 is one of the RZ system's practical attractions. It combines a moderate field of view with a larger maximum aperture than the RB reference lens.
That does not make every RZ lens optically preferable to every RB lens. Compare the exact lens design, condition and intended use.
Both systems focus by extending a built-in bellows.
Maximum extension is 46mm in the cited manuals.
Bellows focusing provides two important advantages:
The RZ67 Pro II adds a fine-focus knob to the main focusing controls.
At close distances, bellows extension changes effective exposure. Both systems provide scales to help determine the required exposure correction.
When an RB lens is mounted on an RZ body, use the focusing screen for confirmation because the RZ body scale does not correspond to that lens configuration.
For macro work, also inspect the bellows carefully. Pinholes, separation or stiffness can compromise both exposure and focusing movement.
Neither camera is intended to behave like a small 35mm body.
The reference RB67 Pro-SD configuration weighs approximately 2.69kg. The reference RZ67 Pro II configuration weighs approximately 2.49kg.
Add a prism finder, grip, longer lens or motorized holder and the working weight rises quickly.
The RB's separate body-cocking and film-advance actions encourage a slower rhythm.
Its controls can be attractive to photographers who prefer direct mechanical feedback and do not mind checking each stage of the sequence.
The RZ combines more of the preparation sequence into one lever stroke.
Electronic warnings reduce some common operating mistakes, and the option of an AE prism can accelerate changing-light work.
Both can be used without a tripod, particularly with a waist-level finder and a suitable strap.
For extended sessions, close focusing, long lenses or slow shutter speeds, stable support is usually more practical.
The revolving rear assembly is especially valuable on support because vertical framing does not require turning the entire camera.
A recently serviced RB67 with a clean lens and reliable holder may be a better purchase than an RZ with corrosion or intermittent electronics.
A tested RZ67 with healthy contacts, accurate shutters and a clean battery compartment may be more dependable than a neglected mechanical body.
The correct comparison is between the actual kits available, not only between their model names.
Before buying either system, inspect every component as an individual item.
No. Normal RB67 operation is mechanical, including the lens shutters. A metered finder may require its own power source.
Normal RZ67 operation requires a 4LR44 or 4SR44 battery. The RZ67 Pro II provides a mechanical 1/400-second fallback, but that single speed does not replace normal electronic operation.
Many RB lenses can be used on an RZ67 under the conditions described by Mamiya. The body dial must be placed at RBL, shutter speed is selected on the lens, and the bellows must be extended by about 7mm for infinity focus.
No. RZ lenses require electronic control that the RB body does not provide.
Not universally. Certain RB holders can be attached to an RZ through the appropriate G Adapter, but electronic communication and safeguards may be unavailable. Check the exact body, holder, insert and adapter.
In the manufacturers' cited reference configurations, the RZ67 Pro II weighs about 2.49kg and the RB67 Pro-SD about 2.69kg. Different lenses and finders can alter that comparison.
The cited roll-film holders for both systems record a 56 × 69.5mm frame and provide 10 exposures per roll.
Both are highly capable. The RZ offers a 110mm f/2.8 reference lens, integrated winding and optional electronic exposure support. The RB provides battery-independent mechanical operation. Condition and workflow should decide.
Both use leaf shutters and can synchronize studio strobes across their normal shutter-speed ranges. With an RZ body, verify that older lighting equipment has a safe trigger voltage.
The Mamiya RB67 and RZ67 share the same core 6×7 studio-camera idea, but they deliver it through different control systems.
The RB67 emphasizes mechanical operation, battery independence and a deliberate working sequence.
The RZ67 adds electronic shutter timing, integrated winding, operating warnings and access to both RZ optics and selected RB lenses.
Neither is automatically the better camera.
Choose the RB when mechanical autonomy and an existing RB kit matter most. Choose the RZ when electronic control, faster preparation and broader directional lens compatibility better match your work.
Before buying, compare the complete kit: body generation, lens, holder, insert, finder, adapter, battery condition and maintenance history.
Explore the Mamiya camera records in Camera_DATA and compare specific bodies and lenses before assembling a system.