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Philips
Flashbulb Data
from 1955,
1970 & 1976 Catalogs
Note: Guide Numbers shown are in meters
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| PHILIPS |
LIGHTING
CATALOGUE |
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The
'topflash' is specially developed
for use on pocket and instant cameras
with piezo-electric ceramic cubes
to provide the electrical
discharge needed for ignition of the
bulbs.
The unit contains 8 hard-glass flashbulbs
and a blue cover divided in two groups
of 4 bulbs, each bulb with its own
individual reflector.
The 'topflash' is shaped as a vertical
array in which the top 4 bulbs will
flash in a given sequence. Flashing
the last lamp of a group
causes the appearance of a yellow
dot.
As the 'topflash' is vertically mounted
on top of the camera, the distance
between the flash source and the lens
opening is increased;
hence, the 'topflash' acts as its
own extender and reduces the occurrence
of red-eye to the minimum.
The 'topflash' is suitable for black-and-white
and colour films, including instant
film.
MULTIPLE FLASH
The 'topflash' features the unique
possibility of simultaneous, multiple
flash and is, therefore, the only
non-electronic flash system
that offers the possibility of adapting
the light output to the flash distance.
As under-exposed pictures are a frequent
cause of
disappointment amongst amateur photopraphers,
simultaneous, multiple flash is an
important advantage in those situations
where
a single bulb proves to be entirely
inadequate.
By pressing the numbers on the 'topflash',
up to four bulbs can be flashed simultaneously.
This will enable the photographer
to
take well-exposed pictures, for instance
at weddings, receptions, sport events
or whenever a large area or many people
form
the subject of a picture.
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RELATIVE
LIGHT
EMISSION CURVE |
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DIMENSIONS
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GUIDE
NUMBERS*
| Film
speed: |
21
DIN = |
100
ASA |
27
DIN = |
400
ASA |
| Guide
numbers: |
25 |
80 |
50 |
160 |
*In accordance with DIN
19011 in meters.
In accordance with ISO 1230 in feet.
Aperature is guide number divided
by distance in meters or feet.
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| TECHNICAL
AND ORDERING DATA |
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Type
number |
Time
to
full peak
msec |
Flash
duration
at half peak
msec |
Ordering
Number |
Gross
weight
kg/100 |
Legal
weight
kg/100 |
Net
weight
kg/100 |
Volume
m3/100 |
|
| PF8P |
12 |
15 |
9239
525 69900 |
3,170 |
2,780 |
2.280 |
0.0104 |
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topflash |
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CRESS Photo
manufactures
flashpans, flashguns ,
ignition devices for
flashbulbs, special
effects FX
apparatus... |
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