Mamiya 645 User manual

80mm Macro C Lens
English Instructions

Names of Parts
1Filter Mounting Ring 2) Magnification Selector Button
3) Magnification Selector Ring
4) Distance Scale
5) Aperture Ring
6) Exposure Meter Coupler
7) Alignment Dot for Lens Coupling 8) Lens Release Button
9) Knurled Ring 10) Coupler Ring
11) Diaphragm Actuating Lever 12) Aperture Ring Coupler
13) Diaphragm Actuating Pin 14) Alignment Red Line for Camera Body
15) Alignment Dot for Lens 16) Alignment Red Lines for Lens
Specifications
Focal
Length
80mm
Lens
Construction
6
Elements
in
4
Groups
Angle
of
View
47
˚
Aperture
Range
f/4
to
f/22
Filter
Size
67mm
Lens
Hood
Not
Required
Length
2
15/16”
/
75mm
Weight
20.6
oz
/
585gm
Introduction
The Macro C 80mm f/4 lens is designed to provide a high resolving power not only in
ordinary picture taking but particularly in close-up photograph and copying.
You can focus up to 1/2 life-size with this lens without using an accessory. By applying the
optional Auto Macro Spacer, which is especially designed for this Macro C 80mm f /4 lens,
however, you can go up to life-size from 1/2 life-size magnification.
The Macro Spacer is coupled to the automatic diaphragm mechanism so that you can take
pictures in exactly the same way as you would with a standard lens.
This lens contains a built-in floating system which is designed to automatically compensate
for increasing typical aberrations with close focusing distances to obtain sharp resolution down
to the edges of the pictures.

In this floating system, a portion of lens elements moves back and forth in accordance with the
photographing distance to obtain the optimum lens performance.
Although this lens does not feature a hood, it provides a sufficient hood effect. I f it is
absolutely necessary to use a hood, you can use one which is designed for the 80mm f l1.9
lens, 67mm ¢ screw-in type.
Using the Lens
When you are using the lens without the Auto Macro Spacer, and when taking photographs up to
1/2 size magnification, set the distance scale (4) to infinity (oo ).
Press down on the Magnification Selector Button (2), rotate the Magnification Selector Ring
(3), and align the Nmark in front of the Selector Button with the red line on the Filter
Mounting ring (1 ). The Magnification Selector Ring will lock at the correct position
automatically.
When aligning the N mark with the red line, always make sure that you have set the distance
scale to infinity (∞) first. Otherwise you may not be able to lock the Otherwise you may not be
able to lock the magnification selector ring at the proper position.
Focus through the finder as you do normally. The image magnification is indicated on the
focusing ring right in front of distance scale.
Attaching the Auto Macro Spacer
Attach the optional Auto Macro Spacer between the camera and the lens. Refer to the
following section for details on how to attach it:
1. Grip the Knurled Ring (9) of the Auto Macro Spacer in one hand and rotate the
Coupler Ring (10) with the other hand. Align the red line on the Aperture Ring
Coupler (12) with the alignment line (16) as shown in the photograph.
2. Rotate the aperture ring and set it to the widest aperture (f/4).
3. When the Macro Spacer and the lens are fitted after aligning the alignment dot (7) of
the lens with the alignment dot ( 15) of the Macro Spacer, the couplers of the Macro
Spacer and the lens will also be set simultaneously. (The role of this coupler is to
interlock with the exposure meter when the PD or CdS prism finder is employed.
When the PD or CdS prism finder is not employed, connecting the coupler is not

automatically.
3. Focus through the finder as you do normally.
o When aligning the alignment line with the S mark, always make sure that you
have set the distance scale to infinity (∞)first, otherwise you may not be
able to lock the Magnification Selector Ring at the proper position.
o Do not use the Selector Ring to adjust the focus. If you do not notice that
the ring has been rotated while you are pushing down on the selector button,
the position of the S mark which you have already set may be thrown out of
alignment.
How to Read the Close-up Photography Table
The distances shown in the close-up photography table indicate the distance from the front
edge of the lens barrel to the subject.
The exposure compensation values are indicated by the numbers cor responding to the steps
in the shutter speed or aperture calibrations.
When the lens is extended for close -up photography, and the distance between the lens and
the film plane increases beyond normal, the image brightness on the film plane decreases,
requiring an increase in exposure. When metering with a hand-held exposure meter, adjust
the exposure by referring to the exposure compensation values in the close-up photography
table. Theexposure compensation is not necessary when using through-the-lens metering
with the PD or CdS Prism Finder.
necessary.)
4. When the Auto Macro Spacer and the lens have been aligned and fitted, rotate the lens
clockwise until it stops. When the lens is rotated up to the stop position, t he lens
release button (8) pops out to lock it.
5. When attaching the Macro Spacer combined with the lens to the camera body,
attach them after aligning the alignment line (14) with the alignment dot (A) of
the camera body, and rotate the lens clockwise until it stops.
Macro Photography from One-half Life Size to Life Size
1. Set the Lens Distance Scale (4) to infinity (∞).
2. Press down on the Magnification Selector Button (2), rotate the Magnification Selector
Ring (3), and align the green alignment line at the rear of the Selector Button with
the S mark (green). The Magnification Selector Ring will lock at the proper position

Removing the Auto Macro Spacer
When removing the lens, remove the Auto Macro Spacer from the camera
body with the lens. To remove the Macro Spacer, rotate it counterclockwise
until it stops, while depressing the Release Button (B) on the camera body.
The lens can be removed from the Auto Macro Spacer by rotating the Auto Macro Spacer
counterclockwise until it stops while gripping the Knurled Ring (9) of the Auto Macro Spacer
and depressing the Lens Release Button (8).