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  Philips Flashbulb Data

from 1955, 1970 & 1976 Catalogs
Note: Guide Numbers shown are in meters

Page 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
 
 


 
 

Flashtime characteristics

"PHOTOFLUX"
Flashbulb PF 100 E


This bulb has been specially designed for photographing with the open-flash method and is very suitable for covering large areas. For colour photography, this type is available with a special blue filter lacquer.

 

GUIDE NUMBERS TENTATIVE VALUES

GUIDE NUMBERS

 

Type

Exposure time in sec.

Type

Exposure
time
sec.

Filmspeed ASA

1/25(X)

1/50(M)

12-20

25-40

50-80

100-160

Daylight colour
film negative

PF 100E/97

45

35

PF 100 E

1/50(M)

65

90

130

180

Daylight colour
film reversal

PF 100E/97

35

30

1/25(X)

80

110

155

220


Type

Light
output
lmsec.

Max.
luminous
flux
Mlm.

Time to
full peak
msec.

Flash
duration at
half peak
msec.

Time to
half peak
msec.

Approx.
colour
temp.
°K

Voltage
range
V

Cap

Colour

Diam.

Ovl.

PF 100E

95000

3.6

30

22

19

3800

3-30

E 27

clear

70

125

PF 100E/97

45000

1.8

30

22

19

6000

3-30

E 27

blue

70

125

 

 

GUIDE NUMBERS

Type

Exposure
time
sec.

Filmspeed ASA

12-20

25-40

50-80

100-160

PF 24 N

1/1000
1/500
1/250
1/100
1/50

-
5
7
10
15

5
7
10
15
20

7
10
15
20
30

10
15
20
30
40

PF 45 E

1/1000
1/500
1/250
1/100
1/50

5
7
10
15
20

7
10
15
20
30

10
15
20
30
40

15
20
30
40
55

"PHOTOFLUX"
Flashbulbs for FP type shutters


Synchronized flash photography with focal-plane shutters calls for lamps with long flash duration of the types shown here. The PF 24 type may be used with miniature cameras such as the Leica and the Contax, which feature a shutter of very short travelling time.

 

GUIDE NUMBERS TENTATIVE VALUES

Type

Exposure time in sec.

1/250

1/100

1/50

Daylight
colour film
negative

PF 24 N/97
PF 45 N/97

-
8

8
12

10
16

Daylight
colour film
reversal

PF 24 N/97
PF 45 N/97

-
5

6
8

8
12

Flashtime characteristics

Type

Light
output
lmsec.

Max.
luminous
flux
Mlm.

Time to
full peak
msec.

Flash
duration at
half peak
msec.

Time to
half peak
msec.

Approx.
colour
temp.
°K

Voltage
range
V

Cap

Colour

Diam.

Ovl.

PF 24N
PF 24N/97

15000
7000

0.55
0.25

-
-

25
25

17
17

3800
6000

3-30
3-30

BA 15s
BA 15s

clear
blue

36

73

PF 45E
PF 45E/97

45000
22000

1.1
0.5

-
-

45
45

18
18

3800
6000

3-30
3-30

E 27
E 27

clear
blue

60

116



 
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