User manual

CFV 50c
38
Note
Although the SWC/M, 903SWC and 905SWC models work in
conjunction with a CFV-50c, the combination is not recom-
mended for critical work in certain instances. It is difficult to
predict all photographic situations so it is advisable to read the
following and make a judgement followed by checking the fo-
cus on the preview to see if it matches your expectations.
The Biogon 38 lens was designed for film use where the unusu-
ally close proximity of the lens to the film plane was of no con-
sequence. However, digital sensors and their protective filters
make very different demands on the angle and travelling dis-
tances of the peripheral rays exiting the rear lens element. Grad-
ual unsharpness consequently occurs towards the edges of the
frame, particularly noticeable with flat subjects (typically copy-
ing situations, 90º shots against building façades, etc) though
these effects will be naturally less obvious with more three-
dimensional subjects. Slight green and magenta casts are also
caused, though these can be removed digitally in Phocus.
Note
The Hasselblad 555ELD, 500EL/ELM and 500/553 ELX models
require a Battery Adapter (optional accessory 3054668) for
untethered use. The Hasselblad ArcBody might also require a
Battery Adapter at certain extreme settings.
The adapter unit consists of two connected battery mounting
plates. It is attached to the CFV-50c in the same manner as a
battery allowing the extra mounting plate to be accessible for
attaching the battery itself.
Note
CFV-50c with ALL CAMERA MODELS
Long exposure times (1/8 s and longer in this case) can occasion-
ally produce capture anomalies such as very strong colour casts,
posterization etc. This, however, is not caused by a fault in the
camera or back but by the sensor being exposed to light before or
after the main exposure time selected on the CFV-50c back.
To avoid this situation you can:
a) Increase the setting on the back by approximately 10-20%
while retaining the determined shutter setting. For example, a
5 sec exposure time would require a 6 sec setting on the back
or a 25 sec exposure would require a ca. 30 sec setting, etc.
or, for optimum ease of use as well as security, the recommendation is:
b) Use the supplied Flash input sync cable. By connecting this
cable from the flash terminal on the lens to the Flash sync IN
terminal on the back, you can bypass the need for any specific
long exposure time settings on the back.
View cameras / Lenses with flash sync shutters
Any view camera with
Hasselblad V adapter
Flash sync input cable
Host computer with FireWire, running Phocus
View / Large Format cameras
For optimum use, the CFV-50c can also be used with view
cameras (with the appropriate Hasselblad V adapter and ca-
bles). The exposure time set on the unit sets the maximum
length of exposure. The default setting is 1/8 sec and this is
the setting that can be kept for all exposures from 1/8 sec
through 1/2000sec. However, this setting should be changed
in accordance with the time required if it exceeds 1/8 sec.
Times up to 34 minutes can be set.
If you prefer, you can connect the ‘Flash sync input cable’ be-
tween the lens PC socket and the unit which allows you to
retain the default setting of 1/8 second while still being able
to use exposure times longer than 1/8 second. This method
also allows the use of the B setting.
MENU > SETTINGS > CAMERA
1. Press MENU.
2. Navigate to Settings
3. Navigate to Camera
4. Navigate to ‘Flash sync*
5. Save the chosen selection by pressing EXIT (MENU
button).
A Hasselblad ELD
model illustrating
the adapter and
battery in use.
Note: Shift settings are not recommended on cameras with
wide angle lenses and a short lens to image plane distance.