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Flashbulb
Guide Number Information
Clear
Flashbulbs are used for black and
white film.
Blue
Flashbulbs are used for color film
daylight
balanced and also for Black and White
film.
All values are approximations, reflector
size and finish, shape, room size, ceiling
heights,wall and ceiling color, average
subject, natural and ambient light,
etc. all have an affect on your final
exposure.
You should perform a variety of test
exposures under
different conditions to familiarize
yourself with the use of guidenumbers
and exposure values using flashbulbs.
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"Sea
of Light"
Photo By: Paul Pilcher
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Number in
parenthesis under lamp type refers to reflector
size and type.
(1) = 4-5 inch polished reflector
(2) = 6-7 1/2 inch polished reflector
(3) = large studio reflector
(4) = 3 inch polished reflector
(5) = 2 inch polished reflector
Guide Number = f: stop
Distance To Subject
To determine your lens opening choose a guide
number based on your ASA film speed,
and your chosen
shutter speed. Divide that guide number by
the distance to your subject.
The result is the f: stop to set on
your lens.
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 All
values are approximations, reflector
size and finish, shape, room size, ceiling
heights,wall and ceiling color, average
subject, natural and ambient light,
etc. all have an affecton...
Click
Here for Blue Bulbs. |
Click Chart
for
Film Rating Conversion Table.
|
 All
values are approximations, reflector
size and finish, shape, room size, ceiling
heights,wall and ceiling color, average
subject, natural and ambient light,
etc. all have an affecton...
Click
Here for Clear Bulbs. |
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PHOTOGRAPHIC LAMPS
- FLASH |
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Class |
Manufacturer |
Type |
Lumen
Secs.
Light Output |
Color
Temp. K |
Base |
Use |
F
(5
milliseconds to
peek) |
Amplex
Duraflash
General Electric
Solar Electric
Sylvania Super Flash
Westinghouse |
SM
SM
SM
SM
SF
SM |
4,700
5,000
4,700
5,000
5,000
5,000 |
3500K
3300K
3300K
3300K
3300K
3300K |
B
B
B
B
B
B |
(a)
(b)
(b)
(b)
(b)
(a) |
|
M
(5
milliseconds to
peek) |
Amplex
Amplex-Norelco
Dura-Flash
Duramite
General Electric
Solar Electric
Sylvania Super Flash
Westinghouse |
| # 5 |
| # 5A |
| # 5B |
| # 11 |
| # 11B |
| # 22 |
| # 22B |
| PF3 |
| PF4 |
| # 5 |
| # 5A |
| # 5B |
| # 5R |
| # 11 |
| # 11A |
| # 11B |
| # 11R |
| # 22 |
| # 22A |
| # 22B |
| # 22R |
| # 8 |
| # 5 |
| # 5B |
| # 8 |
| # 5 |
| # 5B |
| # 8 |
| # 11 |
| # 22 |
| # 22B |
| # 5 |
| # 5B |
| # 11 |
| # 11B |
| # 22 |
| # 22B |
| # 25C |
| B't'm
5 |
| # 0 |
| # 40 |
| # 40B |
| # 2 |
| # 2B |
| # 8 |
| # 5 |
| # 5B |
| # 11 |
| # 11B
|
| # 22 |
| # 22B |
|
| 16,000 |
| 14,500 |
| 7,500 |
| 30,000 |
| 13,500 |
| 63,000 |
| 29,000 |
| 6,000 |
| 11,000 |
| 16,000 |
| 11,000 |
| 7,000 |
| 16,000 |
| 28,000 |
| 23,000 |
| 14,000 |
| 28,000 |
| 65,000 |
| 60,000 |
| 28,000 |
| 65,000 |
| 7,000 |
| 16,000 |
| 7,000 |
| 7,000 |
| 29,000 |
| 13,500 |
| 63,000 |
| 27,000 |
| 16,000 |
| 7,000 |
| 28,000 |
| 13,000 |
| 62,000 |
| 27,000 |
| 20,000 |
| 8,000 |
| 14,000 |
| 7,000 |
| 20,000 |
| 30,000 |
| 14,000 |
| 62,000 |
| 28,000 |
| 7,000
|
| 16,000 |
| 7,500 |
| 30,000 |
| 13,500 |
| 63,000 |
| 29,000 |
|
| 3800K |
| 3400K |
| 6000K |
| 3800K |
| 6000K |
| 3800K |
| 6000K |
| 3800K |
| 3800K |
| 3800K |
| 3200K |
| 6000K |
| 3800K |
| 3800K |
| 3200K |
| 6000K |
| 3800K |
| 3800K |
| 3200K |
| 6000K |
| 3800K |
| 3800K |
| 3800K |
| 6000K |
| 3800K |
| 3800K |
| 6000K |
| 3800K |
| 6000K |
| 3800K |
| 6000K |
| 3800K |
| 6000K |
| 3800K |
| 6000K |
| 3800K |
| 6000K |
| 6000K |
| 3800K |
| 3800K |
| 3800K |
| 6000K |
| 3800K |
| 6000K |
| 3800K |
| 3800K |
| 6000K |
| 3800K |
| 6000K |
| 3800K |
| 6000K |
|
B |
B |
B |
S |
S |
S |
S |
B |
B |
B |
B |
B |
B |
S |
S |
S |
S |
S |
S |
S |
B |
B |
B |
B |
S |
S |
S |
S |
B |
B |
S |
S |
S |
S |
S |
B |
B |
B |
B |
S |
S |
S |
S |
S |
B |
B |
B |
S |
S |
S |
S |
|
(c) |
(d) |
(e) |
(f) |
(e) |
(g) |
(e) |
(h) |
(h) |
(c) |
(d) |
(e) |
(j) |
(f) |
(e) |
(e) |
(j) |
(g) |
(d) |
(e) |
(i) |
(h) |
(c) |
(e) |
(h) |
(f) |
(e) |
(g) |
(e) |
(c) |
(e) |
(f) |
(e) |
(g) |
(e) |
(c) |
(e)
(j) |
(d) |
(h) |
(c) |
(f) |
(c) |
(g)
(j) |
(e)
(j) |
(h) |
(c) |
(e) |
(f) |
(e) |
(g) |
(e) |
|
|
S
(5
milliseconds to
peek) |
Amplex
Duraflash
General Electric
Sylvania Super Flash
Westinghouse |
| # 50 |
| # 50B |
| # 50 |
| # 50A |
| # 50B |
| # 50 |
| # 50B |
| # 3 |
| # 3B |
| # 50B |
| # 50B |
|
| 95,000 |
| 43,000 |
| 95,000 |
| 89,000 |
| 43,000 |
| 95,000 |
| 43,000 |
| 110,000 |
| 50,000 |
| 95,000 |
| 43,000 |
|
| 3800K |
| 6000K |
| 3800K |
| 3200K |
| 6000K |
| 3800K |
| 6000K |
| 3800K |
| 6000K |
| 3800K |
| 6000K |
|
|
(k) |
(e) |
(k) |
(d) |
(e) |
(k) |
(e) |
(k) |
(e) |
(k) |
(e) |
|
|
FP
(5
milliseconds to
peek) |
Amplex
Duraflash
General Electric
Sylvania Super Flash
Westinghouse |
| # 6 |
| # 31 |
| # 6 |
| # 6A |
| # 6B |
| # 2A |
| # 6 |
| # 31 |
| FP26 |
| FP26B |
| # 2A |
| # 6 |
| # 31 |
|
| 16,000 |
| 77,000 |
| 16,000 |
| 8,000 |
| 5,000 |
| 77,000 |
| 16,000 |
| 77,000 |
| 15,000 |
| 7,5000 |
| 77,000 |
| 16,000 |
| 77,000 |
|
| 3800K |
| 3800K |
| 3800K |
| 3200K |
| 6000K |
| 3800K |
| 3800K |
| 3800K |
| 6000K |
| 3800K |
| 3800K |
| | | | | | | | |
