H 10 M645
GETTING STARTED
Phase One A/S
Roskildevej 39
DK-2000 Frederiksberg
Denmark
Phase One U.S.
24 Woodbine Ave
Northport, New York
11768
Tel
USA
Tel
+45 36 46 01 11
+45 36 46 02 22
+00 631-757-0400
+00 631-757-2217
Fax
Fax
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Table of Contents
1 Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2 Special H 10 M645 features . . . . . . . . . . . . . . . . . . . . . . . . . .3
Auto exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Double exposure protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Image orientation detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
IR filter on the CCD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3 Getting ready for taking pictures . . . . . . . . . . . . . . . . . . . . .6
Mounting the viewfinder mask . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Mounting the H 10 M645 on the Mamiya 645AF . . . . . . . . . . . . . .7
Use of cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Using manual focus lenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Cleaning the IR filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Cleaning between the IR filter and the CCD . . . . . . . . . . . . . . . . . .10
5 Current limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Continuos capture mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
6 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
1
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H 10
M645 Getting Started
1 Introduction
The H 10 for M645 is a single shot digital camera back for the
innovative Mamiya 645 AFD camera. The Mamiya 645
utilises a hybrid TTL phase-difference-detection type auto-
focus system. Further more the Mamiya 645AF provides
auto exposure settings. The Mamiya 645AFD with a H 10
M645 back encourages all kinds of photographic uses from
portraiture and wide-angle photography to high speed
shooting to capturing fast action with telephoto lenses. This
exiting combination is a result of a joint development project
between Phase One and Mamiya-OP.
The functionality of the H 10 M645 is well integrated with
the Mamiya 645AFD camera. The H 10 M645 camera back
communicates with the Mamiya camera through a fast inter-
nal electrical computer interface.
The H 10 M645 is based on the highly recognised Phase One
camera back technology. The application software for the H
10 M645 is the same as for all other Phase One single shot
products. The Capture One User Guide is a general manual
for these products. This Manual “H 10 M645 - Getting
Started” covers only specific H 10 M645 features and func-
tionality.
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H 10
M645 Getting Started
2 Special H 10 M645
features
Auto exposure
The Mamiya 645AFD can work in different auto exposure
modes. This is fully supported by the H 10 M645, which com-
municates the equivalent film speed of the digital back to
the Mamiya 645AFD camera.
The default film speed of the H 10 M645 camera back is ISO
50. However this setting can be changed to 100, 200 or even
400 ISO, inside the Capture One application.
It is recommended to capture images using a film curve.
That is done by selecting the film curve in the Capture One
software. Click the camera icon in the icon bar, and select
“Film Curve” or “Film Curve, Natural Black”.
When capturing with auto exposure modes, exposures be-
tween 1/4000 sec. and 30 sec can be obtained. Please note
that images captured with exposure times longer than 2 sec.
can be degraded because of increased digital noise.
3
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H 10
M645 Getting Started
Double exposure protection
When using the M645 with a H 10 M645 it is not possible to
accidently double expose the image by capturing one image
quickly after another. The H 10 communication with the
M645 is disabling capture functionality in the camera when
necessary.
At the end of an image exposure the image information in
the CCD has to be moved from the CCD to the host com-
puter. During this short period of time the CCD must be pro-
tected from light exposure. The H 10 M645 ensures a safe
emptying of the CCD by ignoring the shutter release from
the Mamiya camera.
Image orientation detection
The CCD in H 10 M645 is positioned in landscape orienta-
tion. Whenever an image is captured in portrait position by
rotating the camera, an internal sensor detects this new po-
sition and the image will appear as a correctly oriented im-
age in the Capture One application.
Camera orientation:
Images can be captured in all three positions - and will appear
with the correct orientation in the Capture One software.
4
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H 10
M645 Getting Started
IR filter on the CCD
The IR filter (Phase One TG1 Infrared cut-off filter) is placed
on top of the CCD.
The filter may not be removed for several reasons.
l
l
The focusing of the H 10 camera back will be damaged
It is only possible to remount the filter without dust in
between the filter and the CCD if you have access to
special clean room facilities.
l
The Phase One Product Warranty is terminated.
5
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H 10
M645 Getting Started
3 Getting ready for
taking pictures
Mounting the viewfinder mask
The image area of the Mamiya 645AF is approximately 6 cm
x 4.5 cm. The image area of the H 10 M645 is 2.4 cm x 3.6 cm.
A H 10 M645 viewfinder mask is provided. This mask has to
be mounted beneath the original focusing screen. The
viewfinder mask is positioned in the bracket that holds the
focusing screen. Please refer to the Mamiya 645 AFD In-
structions “Changing the focus screen” before the
focus screen is mounted.
The black mark on the
mask must be orien-
tated to the left front
corner of the bracket.
6
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H 10
M645 Getting Started
Mounting the H 10 M645 on the Mamiya 645AFD
The H 10 M645 is fully integrated with the camera house
and acts as a true part of the whole camera system.
When no cassette is attached to the Mamiya 645 AF camera
house the mirror is up and the shutter is open. This is the
correct position, when no film cassette is attached.
When attaching the M645 to the camera house, the shutter
will close and the mirror comes down.
It is important to ensure that the bottom part of the H 10
M645 camera back is pressed well into the locking mecha-
nism before the upper locking mechanism is pressed to-
gether. Failure to do this can in some circumstances bring
the Mamiya camera house in an error state of continuos
opening and closing the shutter. (The same procedure is rec-
ommended for all film cassettes).
In case this error appears you simply have to remove the H
10 M645. Notice if the shutter is in the closed position, at-
tach and remove the H 10 to make sure that the camera
house gets in the correct starting position.
To avoid that the H 10 is released by mistake from the cam-
era house, you can use the enclosed screwdriver to lock the
H 10 M645 locking mechanism.
Step 1
Step 2
Step 3
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H 10
M645 Getting Started
Use of cables
Using auto focus lenses:
No cables are required be-
tween the H 10 M645 and
the Mamiya 645AFD
when auto focus lenses
are used.
Flash sync cable must be
connected to the Mamiya
645AFD camera house.
CORRECT
When using AF lenses the
flash sync cable must
NOT be connected to the
camera back.
8
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H 10
M645 Getting Started
Using manual focus lenses:
The provided short flash
sync cable shall be con-
nected between the “C”
plug on the H 10 M645
and the lens sync plug.
The flash system sync
cable shall be connected
to the H 10 M645 “F”
plug.
Only exposure times between 1/250 sec. and 30 sec. are
supported.
When using a manual-focus lens in continuous light you
must manually compensate for a small underexposure i.e.
with the setting of the aperture:
Exposure time
1/60 sec
Loss in exposure
1/3 f-stop
1/125 sec
1/2 f-stop
1/250 sec
1 f-stop
Operating the camera from the host computer:
The supplied motor cable must be connected between the
“M” connector on the H 10 M645 and the 8-pin connector on
the Mamiya camera house. AF-lenses as well as manual fo-
cus lenses can be used.
9
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H 10
M645 Getting Started
4 Maintenance
Cleaning the IR filter
When the H 10 M645 camera back is not attached to a
Mamiya camera, the camera back shall be protected with
the protection plate. Still dust particles can stick to the IR fil-
ter. This will degrade the image quality.
The cleaning procedure for cleaning the IR filter is described
in the guidelines for the CCD cleaning kit that came with
your camera back.
Cleaning between the CCD and the IR filter
Do not try to clean between the CCD and the IR filter!
The mounting of the IR filter is done at the factory in a high-
class clean room. This process is a very specialised process
that insures an extremely high quality of the glass surfaces
of the CCD and the IR filter. The screws for locking the IR
filter are sealed. If the seal is broken Phase One will not
guarantee for any particles between the CCD and the IR
filter.
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H 10
M645 Getting Started
5 Current limitations
Continuous capture mode
Continuous capture mode will work as single exposure
mode. Keeping the release bottom down will only result in
one exposure. The release button has to be depressed be-
tween exposures.
11
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H 10
M645 Getting Started
6 Technical data
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Single shot camera back for Mamiya 645AFD
Electrical computer interface between H 10 M645 and
Mamiya 645AFD
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Full support for Mamiya lenses
(1/4000 - 30 sec.)
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Electronic protection against double exposure
Orientation sensor for correct display of landscape and
portrait images
Resolution:
3992 x 2656 pixels
RGB, Grey or CMYK
Image modes:
Pixel depth:
3 x 8 bit or 3 x 16 bit for RGB
8 bit or 16 bit for Grey
4 x 8 bit or 4 x 16 bit for CMYK
Image area:
24.6 mm x 36.9 mm (1” x 1.5”)
Computer connection:
Power consumption:
IEEE 1394
7 watt
Compatible strobe systems: When using Auto-Focus
lenses, please refer to the
Mamiya documentation.
12
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H 10
M645 Getting Started
13
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