Lenses & filters
Pentax 90mm leaf shutter lens User manual
User manual for Pentax 90mm leaf shutter lens. 16 pages in English. Read the original PDF, download or print a copy without registration.
16 pagesEnglish4.9 MB PDF
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Document details
- Brand
- Pentax
- Model / document
- Pentax 90mm leaf shutter lens
- Document type
- User manual
- Language
- English
- Pages
- 16
- File size
- 4.9 MB
- Category
- Lenses & filters
- Document date
- Not specified in catalog
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Page 2 · Read text
1. Aperture Scale
2. Depth-of-field Scale
3. Flash Terminal
4. Cable Release Socket
Shutter Speed Ring
6. Focusing Distance/Aperture I ndex
7. Depth-of-f ield Preview Lever
8. D istance Scale
v. Lens Cocking Lever
10. U/S Lever (on back)View original page 2Page 3 · Read text
www.butkus.us The SMC Takumar 6x7 f l2.B leaf shutter using the lens shutter jointly with the camera lens is a multipurpose lens which greatly shutter. The lens shutter may also be used enhances the picture-taking versatility of the alone with the camera shutter locked opened Pentax 6x7 interchangeable lens system. Not to enable easy and eff icient multiple exposures, onlV does this lens feature an automatic and also to lessen the effects of camera shake diaphragm and of f er the f ull open-aperture in the case of single exposures. Both a f lash metering capabilities of a normal lens, but it synch terminal and a cable release socket are also features a built-in leaf shutter, which, provided on the lens to facilitate special depending upon how it is set, enables various applications. special applications which are beyond the Basically, the types of exposure obtained capabilities of the camera's focal plane shutter with the leaf shutter lens depend on how the alone. In addition to incorporating its own lens shutter is set in relation to the camera shutter, the leaf shutter lens is also provided shutter. Please read this booklet carefully to with its own shutter speed settings f rom 1/30 acquaint yourself with the methods of to 1/500 sec. to enable high-speed f lash operating the lens. synchronization for fill-in flash, etc., when. CONTENTS DESCRIPTION OF PARTS . . .2 MOUNTING/USEASANORMALLENS .......5 HIGH SPEED FLASH SYNCH (for fill-in flash. etc.). . .7-B MULTIPLE EXPOSURES/REDUCED CAMERA SHAKE WITH SINGLE EXPOSURES .10-11 USING THE LENS SHUTTER WITH ACCESSORIES. . . . . .12_13 NOTES ON FLASH PHOTOGRAPHY/PRECAUTIONS. . . . .14_15 SPECIFICATIONS ....15View original page 3
Page 4 · Read text
Venmo @mike-butkus-camera Ph. 2083 PayPal Name Lynn@butkus.org www.PayPal.me/lynnbutkusView original page 4
Page 6 · Read text
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When used without cocking the lens Use as a Normal Lens: After mounting, simply
shutter, the SMC Takumar 6x7 90mm lens focus, set the lens aperture as with other 6x7
functions in the same manner as any other lenses and release the camera shutter to take
fully automatic diaphragm SMC TAKUMAR the picture.
or SMC PENTAX lens. The angle of view
il produced by its 90mm focal length is slightly Note: The position of the lens' U/S lever does
less than that obtained with a 50mm lens in not matter when the lens shutter is not
the 35mm format, which places it in the being used.
standard lens category. A quick bayonet
mounting system has been employed that
enables mounting the lens to the inner mount
of the Pentax 6x7 camera; and fully automatic
diaphragm action assures bright, full aperture
ill focusing.
iii
i.T
H Lens Mounting: To mount the lens, simply
i$
l$ align the red diamond-shaped aperture index
on the lens with the red dot on the camera
body and insert the tabs of the lens mount
inside the camera's inner bayonet mount.
Then, twist the lens clockwise until it locks
into place. To remove the lens, depress the
bayonet lock lever and twist the lens
counterclockwise, until it releases from
the bayonet.View original page 6Page 11 · Read text
(Using the lens shutter with the camera 1. Set the lens' U/S lever to S (Special) - this
shutter locked opened) prevents the lens shutter from tripping when
Multiple Exposures: When the camera's focal you trip the camera shutter. Photo 1.
plane shutter is locked opened and the lens 2. Set theramerat shutter speed dial to the
shutter alone is used to make the exposure, special "time" setting, approximately
the leaf shutter lens proves extremely halfway between 1 /1000 sec. and X on the
convenient for making multiple exposures as shutter speed dial. Photo 2.
the lens shutter can be used independently 3. Set the lens shutter speed by turning the
without advancing the film. The procedure for lens shutter speed ring. Photo 3,
making multiple exposures is as follows. 4. Advance the film and focus.
Digitally signed by Mike Butkus
DN: cn=Mike Butkus, o=Butkus camera
manuals, ou=butkus.org, Mike Butkus email=mike@butkus.org, c=US
Date: 2022.02.13 12:23:07 -05'00'
www.butkus.usView original page 11Page 12 · Read text
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5. Press the camera shutter release button. 7. Repeat step 3 and step 6 above for each
(This locks the camera shutter opened. and additional exposure.
simultaneously closes the lens shutter). 8, After you've made as many exposures as
6. Release the lens shutter either by: you desire, release the camera shutter from
a) attaching a cable release to the lens' the "time" position, by turning the camera's
cable release socket, Photo 4; or shutter speed dial either back to 1/1000 sec.
b) sliding the lens' U/S lever slowly back or X.
toward U to the point where it releases. Note:
Photo 5. (Let go of the lever so that it . Steps 1-4 above may be performed in
springs back to S after the shutter random order. All steps must be performed
releases. ) fully as indicated, however, to assure that
the desired exposure is obtained.
Single Exposures: The lens shutter can also
be used to lessen the effects of camera shake
with single exposures. In this instance, simply
follow steps 1 -6 above; then. release the shutter from the "time" position.
Use of the lens shutter is also recommended
for reducing camera shake even with Pentax
6x7 cameras featuring a mirror lock-up provision,
as this is more effective than use of the mirror
lock-up alone.View original page 12Page 13 · Read text
j rt6
liaI euto Extension Tubes: With both types of shooting, Auto Extensions Tubes nos. 1, 2 I '.$I 3 and 3 may be synchronized for close-up shooting with the lens shutter if used I
I inaependently. Joint use of the extension tubes is not recommended, however, as they | {
l$View original page 13Page 14 · Read text
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Auto Bellows
When the auto bellows is used, joint use of 3. Ready the lens and the camera shutter as
the lens shutter and the camera shutter is not indicated in steps 1-4 on pages 10 and 11.
recommended as proper synchronization is 4. Depress the double cable release button and
difficult to obtain. However, the auto bellows lock it by tightening the locking screw.
and the lens shutter can be used together with Photo 2. (This closes the lens' shutter.)
the camera shutter locked open. The procedure 5. Next, press the camera shutter button to
is as follows. lock the camera shutter oPened.
1. Attach both the camera and the leaf 6. Complete the exposure as indicated in
shutter lens to the Auto Bellows Unit. steps 6 and 8 on page 1 1.
2. Screw the end of the double cable release After tripping the lens shutter, do not
with the red ringed tip into the bellows' cable release the stopper screw of the double
release socket. Photo 1. Leave the other cable release until after you have closed
end hang free. the camera shutter.View original page 14Page 15 · Read text
+Electronic Flash
f0 20 30 40 ms
. Graph comparing flash synch characteristics of electronic flash, MF and M flash bulbs in
relation to shutter speeds and shutter movement in milliseconds using the lens shutter.
Flash Photography shutter speed setting,
1. Hook both electronic flash units and flash . MF bulbswill produce 112ar1160sec.
bulbs to be svnchronized with the lens o FP bulbs will give 213 flash at 1/30 sec;
shutter to the lens' flash terminal and 1 /5 flash at 1 /60 sec.
follow the shooting procedure indicated Precatuions:
on pages 7 and 8. e Follow all shooting instructions carefully
2. Electronic flash units synchronize at all to guarantee optimum results.
lens shutter speed settings from 1 /3O sec. . Do not leave the depth-of-field preview
to 1 /500 sec. lever set at MAN. after closing down the
3. MF and M flash bulbs are the most suitable aperture for depth-of-field preview. Alwayq
flash bulbs to use with lens shutter. Both returri the lever to the AUTO Dosition
types will give full flash at the 1 /30 second before shooting.View original page 15Page 16 · Read text
www.butkus.us SPECIFICATIONS
Lens mount: Pentax 6x7 inner bayonet
Construction: 6 elements in 5 groups
Angle of View: 52.5'
Shutter: Copal "C" special SLR shutter
Speeds: 1 /30 sec. - 1/500 sec.
Diaphragm: Fully automatic lf 12.8 - f l22l Focusing: 0.85m 12.75 f eetl to infinity
Flash: Built-in X flash terminal
Filter Size: Accepts 67mm bayonet f ilters
Other Features: Cable release socket, depth-of-field preview lever, shutter cocking lever
Size: 91.5mmlmax. dia. x 62mm lenqth (excluding mount)
Weight: 610 grams
il
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PDF verified 2026-10-10.