Mamiya M645 Super

Medium format MF film SLR camera


Production details
System: Mamiya M645 (1975)
Imaging plane
Maximum format:Medium format 6x4.5
Mount and Flange focal distance:Mamiya M645 [63mm]
Imaging plane:56 × 41.5mm film
Model:Electronically controlled
Speeds:4 - 1/1000 + B
Exposure metering:None
Exposure modes:Manual
Physical characteristics

Manufacturer description

Special features of Mamiya M645 Super.

1. 3 times more area than 35mm format, less waste of the negative area

The 6 x 4.5cm format offers approximately 3 times more area than the 35mm (24 x 36mm) format. The horizontal and vertical ratio of the area is proportional to the size of most printing papers, so there is little waste of the negative area. For beautiful color enlargements, the 6x4.5cm is the ideal format.

2. Versatile, light-weight body

The M645 Super is a compact, light-weight, all-round camera designed to handle as easily and speedily as a 35mm SLR. Its size and weight are well suited for action photographers.

3. Interchangeable film holder system enables Polaroid photography

The M645 Super features an interchangeable film holder system. A range of film holders can be used depending on the application. A 35mm Roll Film Holder, “Polaroid” Land Pack Film Holder as well as 120 and 220 Roll Film Holders are available. This system can be quickly attached to the camera, ready for the first photograph. Also, fail-safe devices are incorporated including a release lock and removal lock, using a Dark Slide.

4. Unique Moving Coil Electromagnetic Release and High-Precision Electronic Shutter

The M645 Super features a revolutionary, quartz-controlled moving coil electronic shutter which conserves battery consumption.

The moving coil is operated twice by an electronic circuit, to acuate the electromagnetic release.

This unique method allows high-precision shutter control as well as wireless remote control.

5. Large, Bright Focusing Screen N, to satisfy your Applications

It becomes easy to obtain optimum results when looking through the large, bright viewfinder. Five types of Focusing Screens are available to facilitate photographing special subjects.

6. Interchangeable Viewfinders for All Applications

Lightweight, Waist Level Finder N

The waist level finder hood can be opened and closed with a single action. Lifting the magnifier upright completely seals the hood, making the viewfinder ideal for outdoor photography, close-ups and copying. The sports finder which is located outside the hood is convenient for fast action photography.

Prism Finder N suitable for snap photography

The prism finder is well-suited for action photography providing an unreversed, eye-level image. Horizontal or vertical photographs are both easy with this finder.

3-way TTL metering AE Prism Finder N

This AE Prism Finder N features 3-way metering which can automatically switch from center-weighted averaging metering for general photography, to spot metering which will emphasize a specific photographic point or you can designate either of these metering methods according to photographic conditions. These metering systems facilitate AE Photography under difficult conditions, such as adverse lighting. Further a +/-3 EV exposure compensator expands the range of exposure control.

7. A wide Variety of Multi-coated Lenses for Clear, Sharp Images

Mamiya-Sekor lenses have achieved world-renown recognition as professional lenses of exceptional contrast, high resolution, clear definition and excellent color balance. The lens series includes wide-angle to telephoto, and special applications lenses. All of these lenses are multi-coated lo eliminate flare and ghosting, even under adverse lighting conditions.

8. A Broad Accessory System to Expand Your Scope

A full range of accessories are available for the M645 Super to assist you in capturing virtually any type of image. These accessories include hand grips for convenient, easy handling, auto extension rings for easy close-ups and copying, auto bellows, and infrared cordless remote control to satisfy all photographic requirements.

9. Others


Hot shoe type electronic flashes can be mounted.

Multiple exposure operation

A simple operation of the Multiple Exposure Lever allows you to take as many multiple exposures as you wish, thereby making it possible lo explore new photographic situations.

Mirror lock-up system

The mirror lock-up feature enables manual raising of the mirror before the exposure is made to minimize vibration. This provision makes clear close-up and telephoto photography possible even at slow shutter speeds.


CAMERA TYPE: 6 x 4.5cm electronic focal-plane shutter SLR.


FILM TYPE: 120 roll film (15 exposures). 220 roll film (30 exposures). Polaroid® Land Pack film (Polaroid 100, 600 series). 135 roll film in film cartridge

FILM LOADING: Daylight loading interchangeable film backs with film speed dial available for each film type.

LENS MOUNT: M645 bayonet mount.

SHUTTER: Moving coil, quartz-controlled focal-plane shutter.

SHUTTER SPEED: (Electronic) B.4-1/1000 sec. (Mechanical) 1/60 sec.

SHUTTER RELEASE: Electromagnetic release. Built-in shutter release lock and manual lock provided.

MIRROR: Instant return reflective mirror, with mirror lock-up capability.

VIEWFINDER: Interchangeable (Waist Level Finder N, Prism Finder N and AE Prism Finder N).

FOCUSING SCREEN: Standard: Rangefinder Spot/Microprism, with Fresnel lens, accessory screens available.


FILM TRANSPORT: Single turn winding by Wind-up Crank. Variable crank start position (6 positions). Power Drive.

EXPOSURE COUNTER: Progressive type, automatic reset. The counter for 120 and 220 film will be automatic.

MULTIPLE EXPOSURE: Available with Multiple Exposure Lever.

DEPTH-OF-FIELD: Depth-of-field Scale provided on lens.

AUXILIARY RELEASE CONTACT: With Receiver MZ inserted into body Contact, Transmitter MZ can be used for remote control. With Cable Release Adapter in the contact, cable release and self-timer cable can be used.

BATTERY CHECKER: Red LED lights up. With Battery Check Button.

SYNCHRONIZATION: X terminal (hot shoe/terminal), Flash synchronization at 1/60 sec. or slower speeds

BACK COVER: Dark Slide Storage, Memo Clip.

POWER SUPPLY: 6V battery x 1 (4SR44 silver-oxide battery or 4LR44 alkaline-manganese battery).

OTHERS: With neck strap.

Notify of

Copy this code

and paste it here *

Inline Feedbacks
View all comments

Copyright © 2012-2023 Evgenii Artemov. All rights reserved. Translation and/or reproduction of website materials in any form, including the Internet, is prohibited without the express written permission of the website owner.

35mm full frame

43.27 24 36
  • Dimensions: 36 × 24mm
  • Aspect ratio: 3:2
  • Diagonal: 43.27mm
  • Area: 864mm2

Unable to follow the link

You are already on the page dedicated to this lens.

Cannot perform comparison

Cannot compare the lens to itself.

Image stabilizer

A technology used for reducing or even eliminating the effects of camera shake. Gyro sensors inside the lens detect camera shake and pass the data to a microcomputer. Then an image stabilization group of elements controlled by the microcomputer moves inside the lens and compensates camera shake in order to keep the image static on the imaging sensor or film.

The technology allows to increase the shutter speed by several stops and shoot handheld in such lighting conditions and at such focal lengths where without image stabilizer you have to use tripod, decrease the shutter speed and/or increase the ISO setting which can lead to blurry and noisy images.

Original name

Lens name as indicated on the lens barrel (usually on the front ring). With lenses from film era, may vary slightly from batch to batch.


Format refers to the shape and size of film or image sensor.

35mm is the common name of the 36x24mm film format or image sensor format. It has an aspect ratio of 3:2, and a diagonal measurement of approximately 43mm. The name originates with the total width of the 135 film which was the primary medium of the format prior to the invention of the full frame digital SLR. Historically the 35mm format was sometimes called small format to distinguish it from the medium and large formats.

APS-C is an image sensor format approximately equivalent in size to the film negatives of 25.1x16.7mm with an aspect ratio of 3:2.

Medium format is a film format or image sensor format larger than 36x24mm (35mm) but smaller than 4x5in (large format).

Angle of view

Angle of view describes the angular extent of a given scene that is imaged by a camera. It is used interchangeably with the more general term field of view.

As the focal length changes, the angle of view also changes. The shorter the focal length (eg 18mm), the wider the angle of view. Conversely, the longer the focal length (eg 55mm), the smaller the angle of view.

A camera's angle of view depends not only on the lens, but also on the sensor. Imaging sensors are sometimes smaller than 35mm film frame, and this causes the lens to have a narrower angle of view than with 35mm film, by a certain factor for each sensor (called the crop factor).

This website does not use the angles of view provided by lens manufacturers, but calculates them automatically by the following formula: 114.6 * arctan (21.622 / CF * FL),


CF – crop-factor of a sensor,
FL – focal length of a lens.


A lens mount is an interface — mechanical and often also electrical — between a camera body and a lens.

A lens mount may be a screw-threaded type, a bayonet-type, or a breech-lock type. Modern camera lens mounts are of the bayonet type, because the bayonet mechanism precisely aligns mechanical and electrical features between lens and body, unlike screw-threaded mounts.

Lens mounts of competing manufacturers (Canon, Nikon, Pentax, Sony etc.) are always incompatible. In addition to the mechanical and electrical interface variations, the flange focal distance can also be different.

The flange focal distance (FFD) is the distance from the mechanical rear end surface of the lens mount to the focal plane.

Lens construction

Lens construction – a specific arrangement of elements and groups that make up the optical design, including type and size of elements, type of used materials etc.

Element - an individual piece of glass which makes up one component of a photographic lens. Photographic lenses are nearly always built up of multiple such elements.

Group – a cemented together pieces of glass which form a single unit or an individual piece of glass. The advantage is that there is no glass-air surfaces between cemented together pieces of glass, which reduces reflections.

Focal length

The focal length is the factor that determines the size of the image reproduced on the focal plane, picture angle which covers the area of the subject to be photographed, depth of field, etc.


The largest opening or stop at which a lens can be used is referred to as the speed of the lens. The larger the maximum aperture is, the faster the lens is considered to be. Lenses that offer a large maximum aperture are commonly referred to as fast lenses, and lenses with smaller maximum aperture are regarded as slow.

In low-light situations, having a wider maximum aperture means that you can shoot at a faster shutter speed or work at a lower ISO, or both.

Closest focusing distance

The minimum distance from the focal plane (film or sensor) to the subject where the lens is still able to focus.

Closest working distance

The distance from the front edge of the lens to the subject at the maximum magnification.

Magnification ratio

Determines how large the subject will appear in the final image. For example, a magnification ratio of 1:1 means that the image of the subject formed on the film or sensor will be the same size as the subject in real life. For this reason, a 1:1 ratio is often called "life-size".

Manual focus override in autofocus mode

Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.

Manual focus override in autofocus mode

Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.

Electronic manual focus override is performed in the following way: half-press the shutter button, wait until the camera has finished the autofocusing and then focus manually without releasing the shutter button using the focusing ring.

Manual diaphragm

The diaphragm must be stopped down manually by rotating the detent aperture ring.

Preset diaphragm

The lens has two rings, one is for pre-setting, while the other is for normal diaphragm adjustment. The first ring must be set at the desired aperture, the second ring then should be fully opened for focusing, and turned back for stop down to the pre-set value.

Semi-automatic diaphragm

The lens features spring mechanism in the diaphragm, triggered by the shutter release, which stops down the diaphragm to the pre-set value. The spring needs to be reset manually after each exposure to re-open diaphragm to its maximum value.

Automatic diaphragm

The camera automatically closes the diaphragm down during the shutter operation. On completion of the exposure, the diaphragm re-opens to its maximum value.

Fixed diaphragm

The aperture setting is fixed at F/ on this lens, and cannot be adjusted.

Number of blades

As a general rule, the more blades that are used to create the aperture opening in the lens, the rounder the out-of-focus highlights will be.

Some lenses are designed with curved diaphragm blades, so the roundness of the aperture comes not from the number of blades, but from their shape. However, the fewer blades the diaphragm has, the more difficult it is to form a circle, regardless of rounded edges.

At maximum aperture, the opening will be circular regardless of the number of blades.


Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).

Maximum diameter x Length

Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).

For lenses with collapsible design, the length is indicated for the working (retracted) state.

Weather sealing

A rubber material which is inserted in between each externally exposed part (manual focus and zoom rings, buttons, switch panels etc.) to ensure it is properly sealed against dust and moisture.

Lenses that accept front mounted filters typically do not have gaskets behind the filter mount. It is recommended to use a filter for complete weather resistance when desired.

Fluorine coating

Helps keep lenses clean by reducing the possibility of dust and dirt adhering to the lens and by facilitating cleaning should the need arise. Applied to the outer surface of the front and/or rear lens elements over multi-coatings.


Lens filters are accessories that can protect lenses from dirt and damage, enhance colors, minimize glare and reflections, and add creative effects to images.

Lens hood

A lens hood or lens shade is a device used on the end of a lens to block the sun or other light source in order to prevent glare and lens flare. Flare occurs when stray light strikes the front element of a lens and then bounces around within the lens. This stray light often comes from very bright light sources, such as the sun, bright studio lights, or a bright white background.

The geometry of the lens hood can vary from a plain cylindrical or conical section to a more complex shape, sometimes called a petal, tulip, or flower hood. This allows the lens hood to block stray light with the higher portions of the lens hood, while allowing more light into the corners of the image through the lowered portions of the hood.

Lens hoods are more prominent in long focus lenses because they have a smaller viewing angle than that of wide-angle lenses. For wide angle lenses, the length of the hood cannot be as long as those for telephoto lenses, as a longer hood would enter the wider field of view of the lens.

Lens hoods are often designed to fit onto the matching lens facing either forward, for normal use, or backwards, so that the hood may be stored with the lens without occupying much additional space. In addition, lens hoods can offer some degree of physical protection for the lens due to the hood extending farther than the lens itself.


Teleconverters increase the effective focal length of lenses. They also usually maintain the closest focusing distance of lenses, thus increasing the magnification significantly. A lens combined with a teleconverter is normally smaller, lighter and cheaper than a "direct" telephoto lens of the same focal length and speed.

Teleconverters are a convenient way of enhancing telephoto capability, but it comes at a cost − reduced maximum aperture. Also, since teleconverters magnify every detail in the image, they logically also magnify residual aberrations of the lens.

Lens caps

Scratched lens surfaces can spoil the definition and contrast of even the finest lenses. Lens covers are the best and most inexpensive protection available against dust, moisture and abrasion. Safeguard lens elements - both front and rear - whenever the lens is not in use.