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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 |
| 3800K |
| 3800K |
|
B |
S |
B |
B |
B |
S |
B |
S |
B |
B |
S |
B |
S |
|
(l) |
(l) |
(l) |
(d) |
(e) |
(l) |
(l) |
(l) |
(l) |
(e) |
(l) |
(l) |
(l) |
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NOTE:
Symbols found
in chart above
refer to keyed
explanatory statements
below.
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| B
- Bayonet |
|
S
-
Screwbase |
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(A)
Quick flash
- 1/200th
sec. duration.
(b) Quick
flash - 1/200th
sec. duration,
battery use
only.
(c) Midget
bulb for between-the-lens
shutter synchronization.
(d) Amber
lacquered
for use with
indoor color
film, without
filters. Other
characteristics
same as bulb
type aboce.
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(e)
Blue laquered
for use with
Daylight type
color film.
Indoors ot
outdoors,
wihtout filters.
Other characteristics
same as bulb
type above.
(f) General
all-purpose.
(g) Standard
for between-the-shutter
synchronization.
(h) Sub-minature
flashbulb.
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(i)
Infrared
for use
with infrared
films, without
filters.
(j) Lamps
fused for
firing 110-volt
circuits
as well
as with
battery
units.
(k) Slow
peak-high
light intensity
to cover
larger areas.
(l) For
focal plane
shutters
only-long
"plateau-peak".
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CRESS Photo
manufactures
flashpans, flashguns ,
ignition devices for
flashbulbs, special
effects FX
apparatus... |
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