Olympus OM system close-up and macro equipment

Instruction manual

Reproduced with permission from the copyright owner, Olympus Optical Co., Ltd
Printed 1180

Telescopic Auto Extension Tube 65~116

We are sure your Telescopic Auto Tube 65–116 will become a valuable component in your OM System. This unique instrument functions as a portable bellows or variable extension tube for outstanding versatility and convenience in macro photography. Especially when used in conjunction with the Zuiko MC Auto-Macro 135mm F4.5 lens or MC 1:1 Auto-Macro 80mm F4 lens, this unit is unusually maneuverable, and extremely suitable for outdoor action macro photography. To enjoy your macro photography with great pleasure, make yourself familiar fully with the use of this unit and obtain optimum performance from this equipment.

CONTENTS

• DESCRIPTION OF CONTROLS
• DETACHING THE TRIPOD MOUNT
• MOUNTING THE LENS
• MOUNTING ON THE CAMERA BODY
• LOCKING THE AUTO TUBE
• DETERMINING THE PICTURE MAGNIFICATION
• TAKING PICTURES
• EXPOSURE CONTROL
• FOCUSING
• USING A TRIPOD
• TAKING DELIGHT IN VARIOUS TECHNIQUES
• CHART OF PHOTOGRAPHIC RANGES
• MAIN SPECIFICATIONS
• CARE FOR USE

DESCRIPTION OF CONTROLS

DETACHING THE TRIPOD MOUNT

1. Loosen the clamping screw.
2. Rotating the tripod mount by 180°, bring the clamping screw to the top.
3. Pull out the tripod mount.

   To re-attach:

   

4. Aligning red dots, insert the Auto Tube into the tripod mount.
5. Rotating the tripod mount by 180°, bring the clamping screw to the bottom and clamp.

*For shooting with the camera and Auto Tube without a tripod, it is convenient to detach the tripod mount.

MOUNTING THE LENS

Aligning red dots, insert and rotate the lens until the lens release button springs up and you will hear a positive “click”.

To detach the lens, press down on the lens release button and turn the lens counterclockwise.

MOUNTING ON THE CAMERA BODY

Aligning red dots, turn the Auto Tube clockwise until the tube release button springs up with a “click”.

To detach, press down on the tube release button and turn the Auto Tube counterclockwise.

LOCKING THE AUTO TUBE

(1) Rotate the slide ring in the direction of the white arrow to lock, or (2) rotate it in the opposite direction to unlock.

Move the slide (knurled) ring back and forth until you obtain a picture magnification as desired.

DETERMINING THE PICTURE MAGNIFICATION
(in case of MC Auto-Macro 135mm lens)

Pull out the extension rings all the way and lock.

The photo above shows that the magnification for the MC Auto-Macro 135mm lens is 1:2.6 (1/2.6×), thus a correct magnification is indicated by the number (white) in the column that is subjacently aligned with the designation (green) of the lens used.

A correct magnification can be ascertained after locking the Auto Tube.

* The maximum magnification of each lens can be obtained when the Auto Tube is at full extension.

* The focusing ring of the lens is most compressed.

If the extension rings are locked halfway:

* Make it a point to insert the extension ring (A) into the slide ring fully; otherwise the magnification indication may misread.

When the extension rings are pushed in all the way:

In case of the Auto-Macro 135mm: ∞ indicates infinity and the lens can be used as an ordinary 135mm telephoto. (P.10)

The numbers (white) in a subjacent column just below the lens designation (green) indicate picture magnifications for each lens.

The scale A is graduated between 65mm and 116mm in 5mm increments. Refer to the chart of photographic ranges for the magnifications of various lenses.

TAKING PICTURES

Set a picture magnification as desired on the Auto Tube, and lock.
Set the OM-2 on AUTO.

* Lens: Auto-Macro 135mm F4.5

If you wish to touch up the composition as you look through the viewfinder, unlock and move the slide ring back and forth slightly.

* Lenses: 1:1 Auto Macro 80mm F4 + Close-up Lens 80mm Macro.

EXPOSURE CONTROL

Determine the lens aperture according to the exposure mode of the camera used.

* Refer to the manual for the OM System Macrophotography at pages 13-14.

A brighter subject image can be checked for focus with ease at full aperture before the shutter release, because the Auto Tube will stop down the lens aperture automatically at the moment of exposure.

FOCUSING

You can also bring a subject into focus smoothly by moving your body and camera back and forth.

As the field of view is generally dark in macrophotography, it is recommended to select a proper focusing screen most suitable for your purpose.

* Lenses: 1:1 Auto-Macro 80mm + Close-up Lens

USING A TRIPOD

It is convenient to adjust fine focus by means of the focusing ring of the lens when using a tripod. This allows for critical focus without having to adjust the Auto Tube or tripod.

The focusing rail and focusing stage, both optionally available, are recommended to make fine focusing or the camera movement on a tripod easier.

When mounted on a tripod via the Tripod Mount, the camera can be held horizontally or vertically as you like without displacement of the lens center at all.

In case of the Auto-Macro 135mm lens, the back and forth movements of the slide ring permits focusing in a range from close-up to infinity.

For telephotography, however, compress the slide ring and extension rings most and, looking through the viewfinder, use the focusing ring of the lens for focus adjustment even for infinity (∞).

TAKING DELIGHT IN VARIOUS TECHNIQUES

Lens aperture stopped down to F45		Fully opened aperture

The more the lens aperture is stopped down, the more the depth of field is increased, and so is the acceptable zone of sharpness.

In conjunction with the optional T10 Ring Flash 1, the Auto Tube is most recommended for photography of a subject that permits only a small working distance or requires a shadowless light illumination, even by handheld operation of the camera.

The T10 Ring Flash 1 (optional) is provided with a built-in illuminator for composition and focusing in poor lighting condition.

* As a power source for this illuminator the 6V Power Pack 2 or AC Adapter 3 is available.

In combination with the camera body OM-2 and Electronic Flash T32, the Auto Tube can be used in the TTL “off-the-film” Auto Multi-flash photography with ease.

CHART OF PHOTOGRAPHIC RANGES

(For use of various lenses in combination with the Telescopic Auto Tube)

MAIN SPECIFICATIONS

1. Cameras: OM System camera bodies.
2. Lens mount: OM Mount bayonet type; rotation angle 70°.
3. Lenses: OM System lenses between f50mm and f200mm.
4. Extension range: 65mm to 116mm (2.6″ to 4.6″)
5. Focusing: Directly outward telescoping motion with lock at any position (locking rotation angle 15°).
6. Automatic aperture control: Bayonet mount for interlocking with lens diaphragm and meter coupling lever for automatic stop down control and exposure metering.
7. Tripod mount: Accepts any tripod, allowing photography at any angle.
8. Magnification indication: For automatic aperturing with Zuiko MC Auto Macro 135mm and MC Auto-1:1 Macro 80mm lenses; with scale from 65mm to 115mm in 5mm increments.
9. Photographic range:

   ∞ to 0.43×	Zuiko MC Macro 135mm F4.5
   0.5× to 1.2×	Zuiko MC 1:1 Macro 80mm F4
   1× to 2×	Zuiko MC 1:1 Macro 80mm F4 + Close-up 80mm Macro.

10. Size: 70mm diam. × 65mm (2.8″ diam. × 2.6″)
11. Weight: 325g (11.5 oz.) Tripod mount: 100g (3.5 oz.)

CARE FOR USE

1. Do not move the slide ring when locked.
2. If incompletely locked, the extension rings may sometimes slip out of position. Be careful to securely lock before taking a picture.
3. Make it a point to insert the extension ring (A) into the side ring for ascertaining the magnification indication.
4. Avoid pulling or pushing the extension rings by inserting fingers into the rings to avoid damage.
   If dust or dirt collects inside the tube clean with an air blower, etc.
5. After the unit is used in high humidity and temperature, wipe it clean completely.
6. If the unit is rapidly transmitted from low to high temperature places, it will sometime frost. Wipe it off carefully.
7. If frictional sound is audible by sliding the extension rings, or the built-in bearings sound when you swing the unit, it does not matter.
8. Do not stand the Auto Tube on its meter coupling lever or do not apply pressure upon it.
9. Do not move the Auto Tube while clamped on the tripod.
10. If pressure is applied to the tube release button while mounting on the camera the red dots on the mounts sometimes do not coincide with each other. Setting the button free, rotate the ring until the button springs up.
11. For use of a tripod, make sure to attach the tripod to the Auto Tube (not the camera).
12. Do not use two Auto Tubes or more simultaneously or an Auto Tube in conjunction with extension tubes.

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Main Features of Medical Zuiko

1. Accurate and easy autoflash exposure
The OM-2’s electronic brain centrally controls all exposure data to do away with complicated calculations. It automatically shuts off the ring flash emission when the correct amount of light has reached the film surface.

2. Continuously variable magnification
By sliding the Telescopic Auto Tube 65–116, changes in magnification can be monitored continuously in the viewfinder.

3. Convenient working distance even for high image magnifications
The MC Auto Macro 135 mm lens features long working distances 37cm (14.6″)–∞, enabling the photographer to take enlarged images of a lesion without interrupting surgical procedures. The MC Auto 1:1 80 mm Macro is designed to provide optimum resolution at life size.

4. Although the Macro 135 mm has a maximum speed of F4.5, it allows full-open aperture viewing as bright as F4 to facilitate focusing and composition.

5. Ring Filter POL
With the aid of the cross polarizing filter POL, the ring flash reproduces glossy surface objects, reducing undesirable annular light reflection.

6. Hand-held functionality
The compact and convenient design of the equipment ensures mobility not only for medical, but also for outdoor action photography.

7. Choice of power sources
The ring flash operates off batteries (inside the T Power-Control 1 which is mounted to the camera, or a 6 V Power Pack attached to the waist) or the AC Adapter 3.

8. Wide range of applications
Together with other modular OM System components, ring flash is useful in a wide variety of photographic situations (Recordata Back, Winder, etc.).

Cautions

1. The ring flash equipment does not feature explosion-free construction. NEVER use it in the presence of flammable gas.
2. To prevent overheating, do not cover the AC Adapter 3 with a cloth, etc.
3. Depending on the film used, the Ring Filter POL can cause a slight change in coloration (gold tends to turn out bluish; and red, bright red).
4. The POL cuts down light by 3–6 stops, so open up the lens aperture accordingly to compensate for the light loss.

OLYMPUS
OLYMPUS OPTICAL CO., LTD.
San-Ei Building, 22-2, Nishi Shinjuku 1-chome, Shinjuku-ku, Tokyo, Japan. Tel. 03-340-2211