| CAPLESS
"PHOTOFLUX"
Flashbulb PF1
Note:
This is a Bayonet to European Philips
Adapter
THE
LATEST DEVELOPMENT IN FLASHBULBS
Again,
Philips are the first to introduce
a revolutionary flashbulb, which
will bring indoor photography within
the reach of everybody.
The PF 1 capless "Photoflux"
flashbulb together with adaptor
is suitable for every existing flash
gun. Compared to its small dimentions,
it has a very high light output.
FLASHTIME
CHARACTERISTICS
 |
| To
insert the PF 1 in the existing
flash guns a special adaptor
is to be used. This adaptor
carries a device to enable the
user to remove the lamp without
touching it. |
|
| |
PF
1 clear |
PF
1/97 blue |
| Litht
output lm/sec. |
6500 |
3250 |
| Max.
luminous flux Mlm. |
0.6 |
0.3 |
| Time
to full peak msec. |
18 |
18 |
| Flash
duration at
half peak msec. |
8-10 |
8-10 |
| Time
to half peak in msec. |
14 |
14 |
| Approx
colour temp. °K |
ca.
4000 |
6000 |
| Voltage
range V |
3-30 |
3-30 |
| Diameter |
22.5 |
22.5 |
| Ovl. |
51 |
51 |
GUIDE NUMBERS BASED
| Exp.
time
sec. |
Filmspeed
ASA |
| 12-20 |
25-40 |
50-80 |
100-160 |
200-320 |
| 1/400-1/500(M) |
6 |
9 |
12 |
18 |
25 |
| 1/200-1/300(M) |
9 |
12 |
18 |
25 |
35 |
| 1/100(M) |
12 |
18 |
25 |
35 |
50 |
| 1/50-1/60(M) |
15 |
20 |
30 |
40 |
60 |
| 1/25-1/30(X) |
18 |
25 |
35 |
50 |
70 |
GUIDE NUMBERS TENTATIVE VALUES
|
|
Exposure
time in sec. |
| 1/50-1/60(M) |
1/25-1/30(X) |
| PF
1/97
(BLUE) |
Daylight
colour
film negative |
10 |
12 |
| Daylight
colour
film reversal |
8 |
10 |
|
