Fujifilm Provia 400X 135/36 15651945 ユーザーズマニュアル

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FUJIFILM PRODUCT INFORMATION BULLETIN  

•

  FUJICHROME  PROVIA 400X  Professional [RXP]

(Exposure time: 1/2 sec.)

*

Wratten Color Compensating Filters are recommended.

** Exposure correction values when using a filter relative to unfil-

tered exposure results. A “+” followed by a number indicates the
required increase in lens opening.

 

• Use a shutter speed slower than 1/30 second.
• For shutter speeds of 2 minutes or more, exposure adjustments

will be necessary to compensate for reciprocity law failure.

Tungsten Lamps
• A Wratten Filter No.80A is required when using 3200K

tungsten lighting.  A 1 

2

/

3

-stop larger lens opening is

also required.

• If household tungsten lighting (room lamps, etc.)

constitutes the main source of illumination, in addition
to the above filter a Wratten Filter No.82A is required,
plus an aperture increase of 1/3 stop (total 2 stops).

Mixed Light Sources
Under mixed light conditions, the basic filter configura-
tion should suit the main light source.  In the case of
cameras with TTL metering, there is no need for addi-
tional exposure compensation for any CC filter(s) used.

No exposure correction or color balance compensation
is required for exposures within a shutter speed range of
1/4000 second to 1 minute.  However, for exposures of 2
minutes or longer, ‘reciprocity law failure’-related color
balance and exposure compensations are required.

White

Daylight Cool White Warm White

(W)

(D)

 (CW)

(WW)

20M

40R

25M +5R

40B + 5M

+2/3 stop

+1 stop

+1 stop

+1

2

/

3

 stops

• A UV filter No. 2C* or other appropriate ultraviolet

absorbing filter is recommended for scenes that
are shone upon by strong ultraviolet light, such as
seaside locations, snow scenes, and bright distant
views.

• Excessively high or low color temperatures may re-

quire the following filters and exposure corrections.

High Color Temperature:
Cloudy weather landscapes or
portraits in open shade in clear
weather.

Low Color Tempreature:
Morning and evening twilight
scenes and portraits.

+1/3
stop**

+1/3 to
+2/3
stop**

No.81A*

No.82A* or
No.82C*

*

Wratten Filter

** A “+” followed by a number indicates the required increase in

lens opening.

Electronic Flash
• Electronic flash produces light similar to daylight, so

filters are not needed. However, the possibility of un-
desirable effects on color balance, due to various
factors (differences in equipment, use duration, etc.)
should be taken into consideration. Test exposures
are recommended.

• The use of a flash meter is advisable, but the follow-

ing formula can also be used to obtain satisfactory
lens opening.

Lens

   Electronic Flash Guide Number (at ISO 400)

Aperture = ——————————————————————
(F-number) Electronic Flash-to-Subject Distance (meters)

• Set the film speed at ISO 400. Since the amount of

light reflected onto the subject from surrounding sur-
faces will differ with the conditions, refer to the flash
unit instructions.

Daylight Photoflood / Photo-Reflector Lamps
• Daylight-type photoflood or photo-reflector lamp out-

put may be lower than that indicated by the exposure
meter. So it is advisable to compensate for this by in-
creasing exposure time or lens opening. Whenever
possible, test exposures are recommended.

• Other factors requiring consideration when determin-

ing the exposure time are lamp configuration, use
duration and line voltage, as they may affect lamp
output and color balance.

Fluorescent Lamps
• The use of the following combinations of color com-

pensating filters is advisable when photographing
under fluorescent lighting.

• For exacting work, however, test exposures are rec-

ommended because lamp brand and age may affect
light output and color balance.

1/4000 sec. – 1  min.

2  min.

4 – 8  min.

2.5R

5R

None

+ 1/2

+ 1

stop

stop

* Exposure correction values when using a filter relative to unfiltered

exposure results.  A “+” followed by a number indicates the re-
quired increase in the lens opening.

 

Note    : The above figures are based on the use of standard

processing for films with average emulsions. These
figures should therefore be used as a rough guide only.
For more accurate results, it is recommended that
test exposures be made under the actual shooting
conditions.