Macro M 140mm f/4.5 M/L-A Lens
English Instructions
Special Features
The Mamiya M 140mm f/4.5 M/L-A is a Gauss-type lens that incorporates a floating-lens system.
The floating system moves elements within the lens back and forth to adjust the appropriate focusing
distance.
In close-up photography, the system ensures high resolution, not only in the central area of the frame,
but also at the periphery.
Exacting detail, not only at infinity, but also during life-size photography, is ensured when using the
Mamiya Auto Extension Tubes.
Specifications
Shutter Seiko #1 electronic shutter
Optical Construction 6 elements in 4 groups
Angle of View 35˚
Lens Hood Screw-in type with 77mm diameter threads
Size 90 x 97mm
Weight 870g without caps
Names of Parts
Using the Lens without a Macro Extension Tube
1. Focus the lens. The Floating Ring may be set at any position.
2. Determine the bellows extension using the Bellows Extension Scale (mm) on the left side of the
camera, Fig. 1 (1).
3. Align the bellows extension on the Floating Scale’s White Scale with the red Index Mark. For
example, if the bellows extension is 25, you would align 25 with the red Index Mark, Fig. 2.
4. Refocus the lens.
When photographing subjects at a great distance, sufficiently sharp images may be obtained by
setting the Floating Ring to infinity (∞); however, if maximum sharpness is required, at the
periphery of the frame, follow Steps 1-4, above.
Anytime you adjust the Floating Ring, be sure to refocus the lens.
Using the Lens with the Auto Extension Ring No. 1
1. Focus the lens. The Floating Ring may be set at any position.
2. Determine the bellows extension using the Bellows Extension Scale (mm) on the left side of the
camera, Fig. 1 (1).
3. Align the bellows extension on the Floating Scale’s Green No. 1 Scale with the red Index Mark.
For example, if the bellows extension is 25, you would align 25 with the red Index Mark, Fig. 3.
4. Refocus the lens.
If the bellows extension is within the range of the Green No. 1 Scale, a sufficiently sharp image
may be obtained; however, if maximum sharpness is required at the periphery of the frame,
follow Steps 1-4, above.
Using the Lens with the Auto Extension Ring No. 2
1. Focus the lens. The Floating Ring may be set at any position.
2. Determine the bellows extension using the Bellows Extension Scale (mm) on the left side of the
camera, Fig. 1 (1).
3. Align the bellows extension on the Floating Scale’s White No. 2 Scale with the red Index Mark.
For example, if the bellows extension is 25, you would align 25 with the red Index Mark, Fig. 4.
4. Refocus the lens.
If the bellows extension is within the range of the White No. 2 Scale, a sufficiently sharp image
may be obtained; however, if maximum sharpness is required at the periphery of the frame,
follow Steps 1-4, above.
Using the Lens with the Auto Extension Rings No. 1 and No. 2
1. Focus the lens. The Floating Ring may be set at any position.
2. Determine the bellows extension using the Bellows Extension Scale (mm) on the left side of the
camera, Fig. 1 (1).
3. Align the bellows extension on the Floating Scale’s Red No. 1 + No.2 Scale with the red Index
Mark. For example, if the bellows extension is 25, you would align 25 with the red Index Mark,
Fig. 5.
4. Refocus the lens.
The maximum extension on the Red No.1 + No. 2 Scale is 15mm, at which life-size images can
be created. Extensions beyond 15mm will result in image-quality deterioration.
When creating live-size images, set 15mm on both the Red No. 1 + No. 2 Scale and the
Bellows Extension (mm) Scale, and then move the camera back and forth to achieve focus.
Depth-of-Field and Magnification
1. After focusing the lens, use the Distance Scale on the left side of the camera, Fig. 1, to determine
the film plane to subject distance.
2. Set this number opposite the DOF Distance Scale’s Index Mark. The depth-of-field and
magnification can be read from the DOF Distance Scale.
Magnification is expressed in ‘MAG’ numbers. A MAG number is the reciprocal of the
magnification. For example, a MAG number of 50 indicates that the subject is being
photographed at 1/50 its size, etc.
Depth-of-field can be observed by holding the lens’ Depth-of-Field Preview Lever on the lens, and
then observing the depth-of-field through the viewfinder. Moving the lever stops the lens down to
its working aperture; releasing the lever return the lens to full aperture.
Exposure Compensation
Exposure compensation is expressed in STEP values, which are listed below the MAG Numbers on
the DOF Distance Scale.
A STEP value of 0.5 indicates that the exposure compensation is ½ stop; either open the aperture
by ½ stop or decrease the shutter speed by ½ stop. A STEP value of 1 indicates that the
exposure compensation is one stop; either open the aperture by one stop or decrease the shutter
speed by one stop.
If you are using an AE Prism Finder, setting exposure compensation is unnecessary.
Time Exposures
1. Press and hold the Time Exposure Lever Release Button.
2. Move the T Lever all the way in the direction of the arrow, and then release the Time Exposure
Release Button. The T Lever will lock in its time-exposure position.
3. Press the Shutter Release Button, the shutter will open and remain open until you release the
Shutter Release Button.
4. To stop making time exposures, press and hold the Time Exposure Lever Release Button.
5. Slide the T Lever all the way in the opposite direction of the arrow, and then release the Time
Exposure Release Button.
CAUTION – Do not touch the camera’s Cocking Lever while making a time exposure. Doing so
may result in moving the film.
The camera’s Shutter Speed Button may be set to any value except RBL while making time
exposures; however, it is recommended to set the Shutter Speed Dial at 1/30 or higher.
During a time exposure, no power is consumed from the battery.
Close-up Photography Table
Subject distances are measured from the outermost edge of the lens to the subject.
Values on the left side of each column are used when a macro extension tube is used.
Values on the right side of each column are used when the bellows is fully extended to 46mm.
Depth-of-Field Table
Depth-of-Field Table (cont.)
Auto Extension Macro Tubes
Both the No. 1 tube, with an extension of 45mm, and the No. 2 tube, with an extension of
82mm, automatically couple with the lens.
The tubes can be used individually, or they may be combined for a total extension of 127mm.
A total extension of 173mm may be obtained by using both tubes together and the maximum
bellows extension of 46mm.
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