Film cameras
PENTAX AF 240FT User manual
User manual for PENTAX AF 240FT. 33 pages in English. Read the original PDF, download or print a copy without registration.
33 pagesEnglish6.6 MB PDF
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Document details
- Brand
- Pentax
- Model / document
- PENTAX AF 240FT
- Document type
- User manual
- Language
- English
- Pages
- 33
- File size
- 6.6 MB
- Category
- Film cameras
- Document date
- Not specified in catalog
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Page 2 · Read text
Specifically designed for use with the Pentax KAF mount cameras, the AF24AFT is an excellent clip-on type flash unit with a Guide Number of 24 with ISO 100 film in meters, enabling you to perform daylight sync flash photography so easily in the TTL Auto Flash mode. Its unique, built-in AF Spotbeam Projector also enables you to focus even in the dark. Please read this manual carefully so that you can always operate the unit properly, making the most of the features and functions this flash unit has to offer.View original page 2
Page 5 · Read text
DESCRIPTION OF OPERATING PAHTS
Adapter groove
Flash head
Battery{hamber cover
Wide-angle adapter FWB (optional)
5P-sync-cord socket
Telephoto adapter FT (optional)View original page 5Page 7 · Read text
BATTERY LOAOING
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1. To open the battery-chamber cover, slide it in 3. As you turn on the power, the power-OK lamp
the direction of the arrow, as illustrated. will be on, and a few seconds later, the READY
2. Insert {our AA-size batteries into the battery lamp will be on indicating that the battery
chamber, with their (+) (-) sides placed charge is complete. As you press the TEST
correctly as shown inside the chamber, and button at this point, the flash will fire.
reDlace the cover.
When the flash is mounted on the KAF
mount cameras, press the TEST button with
the camera's main switch turned off. lf the
main switch is on, the flash will not f ire.View original page 7Page 8 · Read text
BATTERIES www.butkus.us
This f lash unit is powered by four AA-size PRECAUTIONS:
ALKALINE, MANGANESE or Nl-CD batteries. . lf the power-OK lamp does not light as you turn
(NiCd batteries need a charger available locally-) on the power, try to change the +/- position of
The flash recycle time is about eight seconds with the batteries or use fresh batteries.
fresh manganese batteries, about four seconds r When loading batteries, the +/- position must be
with alkaline batteries, and about three seconds correct as indicated inside the battery housing.
with NiCd batteries. lf it takes more than 30 Otherwise, such might cause leakage of chemical,
seconds, the batteries should be replaced with battery heating or explosion.
the new ones. o When changing batteries, all 4 should be changed
with batteries of the same kind. Never try to mix
used batteries with fresh ones.
. Do not leave batteries in the flash unit too long if
you are not using the flash. Old batteries may
corrode or leak chemical, which might damage
the flash.
. The battery performance will go down in
extremely cold climate: try to keep them warm.
.ALWAYS KEEP BATTERIES OUT OF
THE REACH OF CHILDREN.
ONEVER THROW USED BATTERIES
INTO A FIRE OR EXPOSE TO
EXCESSIVE HEAT TO PREVENT
EXPLOSION.View original page 8Page 9 · Read text
O PoWER.OK LAMP
This will be ON when the power or the spot-
beam (SB) is ON, indicating that the batteries
are OK.
O READY LAMP
The READY lamp will be ON when the battery
charge is complete a few seconds after the power
switch-on, making the flash ready for f iring.
Try to start using the flash a few seconds after
this light is turned on, instead of immediately
thereafter.
O TTL AUTo cHEcK LAMP (A. cHEcK)
Same as the auto check lamo inside the view-
f inder, this green lamp will be turned on for
about 2 seconds when the flash light has
www.butkus.us properly reached the subiect in TTL flash
mode. (Page 11)
As you mount the AF240FT onto the KAF mount
camera and lightly press the shutter button,
various activating signals are sent out through
the camera/f lash contacts.
oView original page 9Page 10 · Read text
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O rrI AUTo LAMP
This will be ON when the switch is turned to
TTL AUTO. (Pase 11)
O TnRILING GURTAIN SYNC LAMP t I> ]
This lamp will be turned ON when you turn'
the leading/trailing curtain sync switch to
the trailing curtain sync and lightly press
the shutter button. (Page 17)
O FLASH.CoVERAGE WARNING LAMP
(FL. COV.)
When a Pentax-F lens whose angle of view is
wider than the flash-coverage angle of this
unit, is used, this lamp flickers as a warning.
o u r ak' ibfitE.b'Ntfi ut Fdwe n.o Fi
When this flash is kept powered on for about
5 minutes, its power saver function starts
working, and automatically turns off the pow-
er. Turn on the power switch again to turn it
on. (When it is mounted on the KAF mount
camera, lightly press the shutter button to
turn on the power.)View original page 10Page 11 · Read text
Mounting to camera body S€tting the calculator board
1. Remove the hot-shoe cover. Film speed calibration (lSOl
2. Insert the hot-shoe bracket into the hot shoe, Move the film-speed-set lever and set the film speed
and tighten the fastening knob by turning it against the white index mark.
toward [eFlX] . To remove, take the reverse W index = When the wide-angle adapter is used
procedure. T index = When the telephoto adapter is used
. Be sure to hold the lower portion of the flash o The calculator board merely serves for checking
body when mounting or dismounting it. the flash distance range, and has no electrical
connections.View original page 11Page 12 · Read text
APPLICABLE LENSES AND FLASH.COVERAGE WARNINGwww.butkus.us Applicable lenses The flash+overage angle of the AF24OFT is wide enough to cover the angle of view of wide-angle lenses up to 35mm. When using a wider-angle lens of 28mm or a telephoto of 85mm or longer, combine the wide-angle adapter (FWB) or telephoto adapter (FT) available as optional accessories. (See Page 24) Flash-coverage warning When the angle of view of the Pentax-F lens used is wider than the flash-coverage angle, the flash- coverage warning lamp flickers as you depress the KAF mount camera's shutter button halfway down. lf, regardless of the warning, the shutter is released. a picture with darkened corners or edge Wide-angle adapter (FWB) in use will be taken because the flash does not fully illuminate the entire picture area. In such a case, attach the wide-angle adapter or detach the telephoto adapter, or change the focal length of the lens in use (when, for example, using the 28mm focal length of the Pentax-F zoom lens without using the wide-angle adapter).View original page 12
Page 13 · Read text
F LASH/CAME RA COMBINATION
With the AF24OFT mounted on the KAF mount
camera, the following "dedicated" functions The TTL Auto Flash system measures the
will be in operation. When it is mounted on other existing light coming in through the lens and
PENTAX cameras, these "dedicated" f unctions falling on the film plane of the camera right up to the instant of exposure and auto-will not work. matically controls the light output of the
flash unit. Since it measures only the light
CAUTION reflected from the subject, correct flashAvoid using this flash on other manufacturer's exposure is always assured.cameras with an electronic f lash contact outside
of the hot shoe contact, as it may damage
the camera's electronics or it may result in
an erroneous operation.
Dedicated Functions with the KAF mount camera
TTL AUTO FLASH MANUAL FLASH
Programmed flash * X
Trailing curtain flash sync o X
Slow speed flash sync o o
Auto switch to X shutter speed o
Flash ready display in finder o o
TTL auto check in finder o X
AF spotbeam 4 o o
*Aperture and shutter speeds vary according to the brightness of subjects.View original page 13Page 15 · Read text
When the Lens Aperture ls Set at "A"
www.butkus.us with the AF240FT mounted on the KAF mount
camera, you can command a programmed flash
photography in combination with Pentax-F or -A
lenses. Depending upon the light intensity of
the subiect, the flash sync speeds (1/60*1/100sec.)
and the aperture settings ft 12.8-f l'l1 /lSO 1 001
will change automatically, making this highly
suitable for daylight fill-in flash. (See page 16)
When the Lens Aperture ls Set Other Than at "A"
When you set the camera in the Aperture-Priority
AE or Metered Manual mode, you have the
command of TTL auto flash photography with
the depth of field as the priority. Furthermore. in
the Metered Manual mode, slow speed flash is also
Determ ining Photographable Distance f rom possible. (See page 181
Calculator Board
As shown above, when ISO 100 film is used and
the aperture is set at l14,the maximum photo-
graphable distance is 6 meters (2O ft.).
Furthermore, the minimum photographable
distance can be obtained by dividing the maximum
photographable distance by 6, viz., 6m + 6 = 1 meter.
. Also refer to PHOTOGRAPHABLE DISTANCE
RANGE TABLE on page 27.
12View original page 15Page 18 · Read text
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Switching "H" and "L"
1. Turn the switch to either MANU H or L.
2. From the calculator board, get the combination
I ofthetheH range,exposureuse distancethe metersandofthetheaperture.lower whiteFor
scale, and the meters of the upper yellow scale
for the L scale, For example, with ISO 100 and
at a distance of 3m, set the lens aperture to
f/8 at the H range and f 12 ar the L range.
3. Turn on the power, and as soon as the READY
lamp is ON, you are ready to start shooting.
I
I
15View original page 18Page 19 · Read text
DAYLIGHT SYNC FLASI{
Daylight sync flash used
lf you are photographing against light or a bright
window behind your subject, your subject will be
under-exposed and appear dark in pictures if you
expose according to the camera's exposure system.
To compensate for this lack of exposure on
your subject, your subject should be additionally
illuminated to be balanced against the backlight.
The daylight flash is used for this purpose, and
the programmed f lash is what you need.
o ln a very bright spot, the flash may not fire.
To make sure that the flash wlll fire, use manual
flash mode.
16View original page 19Page 20 · Read text
TRAILING CURTAIN SYNC FLI\SH www.butkus.us
Trailing curtain sync f lash used
ln normal electronic flash, the flash is f ired at
the instant of the completion of the travel of
the f irst shutter curtain, and this is the leading
curtain sync flash. In the trailing curtain sync flash,
the flash is fired at the instant of the beginning
of the travel of the second curtain, and this
flash mode is very helpful in freezing moving
subjects.
As you lightly press the shutter release, after
turning the leading/trailing curtain sync switch
to the trailing curtain sync, the trailing curtain
sync lamp will be lighted. When pre-set in manual
mode, it will be automatically changed to TTL
auto flash. Leading curtain sync flash used
o The built-in f lash of the KAF mount camera does
not have the trailing curtain sync mode, and does
not co-work with the AF240FT.View original page 20Page 21 · Read text
TW I N- F LASH/SLOW-SPE ED.SYNC PHOTOG RAPHY. ETC.
Twin Flash Bulb Sync Flash Photography
Twin flash photography will be under your control When using an "open f lash," with the shutter left
with the AF24OFT in combination with the built- open at the B setting, fire the f lash with the TEST
in flash of the KAF mount camera. button. Remember to disconnect the f lash from
A twin TTL auto f lash will be very simple. the camera body.
Set the f lash mode switch to the TTLauto mode.
Diffused Flash Photography
Slow Speed Sync Flash In addition to bounce f lash, diffused flash also
A normal flash picture of a subject against a dark softens pictures. Cover the f lash head with a white
background will show the background as very dark. handkerchief or piece of paper to diffuse the f lash
Slow shutter speed sync f lash will somewhat light. This is a valuable technique for close distance
brighten the background for a balanced TTL f lash.
photograph. Set the camera's exposure mode to
the metered manual and set the shutter speed
and aperture according to the light condition of
the back ground. Make sure the main subject is
within the f lash range with the aperture being set.
Continuous Flash Photography
In the manual L mode, f resh NiCd batteries will
last for 40 continuous f lash photographs at 1.8
f rames per second.View original page 21Page 23 · Read text
AF SPOTBEAM
The KAF mount cameras have a built-in spotbeam
projector reaching up to 4 meters for focusing in
the dark. AF24OFT, on the other hand, has a more
powerful near-infrared spotbeam proiector reaching
up to 6 meters. This spotbeam projector operates
in the AF SINGLE (SF7/SF10: AF) mode.
With the AF24OFT power switch turned on SB,
you can use the camera exclusively as a spotbeam
model for dim light environment.
When using the flash in dark spots, the spotbeam
will automatically fire depending upon the lighting,
when the pilot light is on.
20View original page 23Page 24 · Read text
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Spotbeam with tho KAF mount camera + AF240FT
1. Turn the AF240FT switch to SB. The power-
OK lamp will be on.
2. Set the KAF mount camera's focus mode lever
to AF SINGLE (SF7/SF10: AFl.
3. Lightly press the shutter release. As soon as
the in-focus signal I o ] inside the viewfinder is
on, you are ready to start shooting.
. lf the > < mark stays on for several seconds,
it indicates that the subject cannot be correctly
focused. ln this case, you have to manually focus
the lens.
. When changing your scene to be photographed,
naturally you have to refress the shutter release
for auto-focusing.
. When using the AF24OFT Spotbeam, the AF
Spotbeam on the camera will not work.
. The Spotbeam will work accurately only when
the flash is mounted onto the camera's hot shoe.
21View original page 24Page 25 · Read text
;] SPECIFICATIONS
?;
TyPe: Cl ip-on type, seria l-control led, TT L-Auto electron ic f lash
Guide number: Two switchable steps of H and L
H24 LO (lSO 100, m)
H48 L12 (lSO 400, m)
Flash duration About 1|2OOO sec. at Manual H discharge; about 1/20000 sec. at Manual L
lat 112 peakl: discharge; about 1/30000 sec. at Auto shortest discharge
Flash frequency &
Power source Recycle time Flash frequencyRecycle time
(at H discharge): Alkaline batteries About 4 sec. About 300
Manganese batteries About 8 sec. About 80
Ni-Cd batteries About 3 sec. About 120
(according to our own test conditions)
Continuous discharge: No less than 40 flashes in L mode at 1.8 fps., with fullcharged Ni-Cd batteries
Flash-coverage angles : About 45" (vertical) and about 6Oo (horizontal); equivalent to the angle of view
of 35mm-format 35mm wide-angle lens
Color standard: Daylight color
Auto coupling range: O.7 - 4.3 meters (GN 24, ISO 100, f/5.6)
Dedicated functions: With the KAF mount cameras - Flash-ready indication, finder auto check, auto
shutter-speed change, slow shutter speed sync f lash/trailing curtain sync f lash
signals, AF spotbeam signal
With other Pentax cameras - No dedicated functions. Manual operation only.View original page 25Page 26 · Read text
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Auto power-off : Automatic turn-off after 5 minutes of switch-on
Power quick-on: Slight pressure on shutter button after auto turn-off (with the KAF mount camera)
Power source: Four AA-size batteries (alkaline, manganese or Ni-Cd)
Dimensions & weight: 72Ml x 114(H) x74lDl mm;210 grams without batteries
Standard accessory: Case
Optional accessories: Wide-angle adapter (FWB), telephoto adapter (FT)
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT ANY OBLIGATION
ON THE PART OF THE MANUFACTURER.
23View original page 26Page 27 · Read text
HOW TO USE WIDE-ANGLE & TELEFHOTO ADAPTERS
To mount these adapters on the flash unit, lust www.butkus.us slide them into the adapter grooves on both sides
of the f lash head. The wide-angle adapter makes
the f lash illumination wider, and enables you to
use a wide-angle lens up to 28mm with this flash.
The telephoto adapter makes the illumination
concentrate and intensify effectively enough to
cover the photographable distance of telephoto
lenses from 85mm to 200mm.
Using in TTL Auto Flash mode
To determine the photographable distance
according to the aperture chosen, align the ISO
number of the film in use with the white index
(W = Wide-angle, T = Telephoto) of the adapter in
use, as shown at left,
For example, when the FWB is used, you can shoot
up to 3 meters with ISO 100 film and the aperture
set at f/5.6. (The minimum photographable
distance cah approximately be obtained by
dividing the maximum photographable distance
by 6.)
Wide-angle adapter ( FWBI Using in Manual mode
(Guide number H17 L42 ISO 10O, m) Just as you use the TTL Auto mode. align the ISO
Telephoto adapter (FTl number of the film in use with the index of the
(Guide number H34 L8.5 ISO 100, m) adapter (W or T) in use.
24View original page 27Page 28 · Read text
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Telephoto adapter FT
Wide-angle adapter FWB
25View original page 28From the M. Butkus archive. Original publisher and archive notices are retained.
Check the model and edition against your equipment.
PDF verified 2026-10-10.