Modern Classic SLRs Series :
Olympus OM-1(n) - Instruction Manual - Part IV


HTML Page (84k) Loading ...

OM Photographic System IF high speed autofocus SLR system is NOT your top priority, OM System is comprehensively arrayed to meet an ever-expanding universe of photographic conditions for any subjects from the stars to micro organisms.

Don't get fooled by the compact and slim size of the OM cameras. Any of the OM SLR models has, in fact a full blown photographic system behind them. It is distinguishable by some of the prerequisite characteristics as broadly Mentioned below:

* Interchangeability of focusing screens. (More information is available) * Adaptability to high speed motor drive photography. * A wide range of high quality system components, including some very high quality Zuiko interchangeable lenses; a tough and reliable shutter, viewfinder, etc. that withstand harsh handling without failing. When these exacting conditions have been satisfied, an OM -1 is born as a true system camera that controls an entire SLR comprehensive system. The OM-1 is backed up with over 300 components systematically organized under eight groups - Interchangeable Lens, Finder, Flash, Motor Drive, Phototechnical, Macrophoto, Photomicro and Case. (referring to main index page for direct access LINK to various sections)


Zuiko Interchangeable Lens Group Perhaps one of the most important component in any photographic system is the lens choice for the camera. One of many advantages of the single lens reflex camera is the large variety of interchangeable lenses available. The Zuiko Interchangeable Lens Group (designed and manufactured by Olympus) comprises of the early 30 odd which have mushroomed to more than 50 lenses.

Zuiko lenses have always enjoyed a high reputation in photographic circles with their new series of innovative, high performance lenses. These lenses have a host of special features including new construction that compensates for close focus aberrations, increased aperture ratio in the wide angle lenses, and a BIG reduction in telephoto lens size and weight.


The OM System adopts 49mm filters for most lenses from 21mm to 600mm. Which include some high performance high speed telephoto lenses employing with color correction optical formula such as the use of extra-low dispersion glass and high reflective index optics.

There a fairly good selection of zoom lenses to choose from but some of the specialized lenses designed by Olympus are true classic such as the 21mm f2.0 ultrawides, 24mm f3.5 Shift Perspective Control lens , the famed photo-micro lenses which still remains as the most comprehensive among any manufacturers until today !

As part of the OM System design all the lenses now offer higher performance in small configurations. Olympus has produced lenses for microscopes for decades and the new Zuiko lenses benefit from this scientific experience.

Lens Group Unit

* Camera Body Cap
* Rear Lens Cap
* Front Lens Caps (49mm, 55mm, 72mm and 100mm in diameter)
*Adapter Ring 49 --+ 72m A lens hood/filter mount for the 18mm F3.5 lens.

* Lens Hoods Lens hoods protect against extraneous light striking the lens and causing unwanted flare. Hoods for standard lenses are cover types and can be reversed to provide easy storage even when the camera is in the case.

* Filters: Filters are essential to the effective rendition of photographic subjects. While most photographers used it just as a protective cover mount in front of the lens to protect the more expensive optic, but filter have more usage than that. In controlling contrast and eliminating unwanted haze in black and white photography, the use of the correct filter often means the difference between a good photograph and a great one. In color, where the balancing of the light with the film emulsion is absolutely necessary for correct color, conversion and light balancing filters are the only effective way of achieving the desired results. *Be careful not to use two filters simultaneously in order to avoid unintentional cut off in the periphery of a photograph. (See the table of various filters below.)










B. & W. and Color


(1 A)


Similar to UV filter. Eliminates ultraviolet rays. Reduces haze and bluish tones in daylight photography. Effective with color film only. May be used at all times to protect the lens.








Eliminates undesirable ultraviolet rays which cause dull, flat pictures. Renders subject in clear, detailed brilliance. May be used at all times to protect the lens.






Grey Gray

Reduces the quantity of light entering the lens to 1/2 or 1/4 of the original intensity. For use in extremely bright conditions when you wish to maintain a wide aperture.





Polarizing filter POL


Enables you to take pictures through glass or water without reflections. Will darken the sky in black-and-white photographs without altering other color values in the picture, and renders blue skies darker when used with color film. Reflections are reduced to provide better texture surface detail.





B. & W

Y48 (Y2)


Accentuates contrast, darkens blue skies. Very effective in daylight scenes where the sky is part of subject matter. Heightens the effect of white clouds. Useful in copying documents where line copy is blue or black on light background.





056 (02)


Absorbs a wider range of wavelengths from UV to dark green than the Y2. Makes a superb rendition of the texture of outdoor subjects, and indoors. It brings out detail in objects yellow, brown. Used with infrared film.





R60 (R1)


Used as contrast fiIter to create dark ened sk y or in copying. Also used to penetrate haze in landscape photography for stronger contrast than an 02 filter. Used with infrared film.






A4 (81 C)


For use when taking color pictures in cloudy or rainy weather. Reduces bluish tone.





B4 (82C)


Designed for use when taking color pictures in early morning or late evening hours when red rays are predominant.





Olympus OM Finder Group (More info relating to this topic) The viewfinder is one of the most important features of a single lens reflex camera. Since every photographic subject is turned into a visual image by means of the finder, a finder that is dark or difficult to look through is an obstacle to good photography.

However, enriched an SLR camera is with a wide range of interchangeable lenses, the SLR cannot be expected to full fill its essential function without the provision for changing of focusing screens. The OM-1 is provided with a viewfinder that offers a far brighter, large image than previous 35mm SLR cameras.

The Finder Group supplements this basic advantage with a comprehensive set of 14 focusing screens for a wide variety of applications from photornicrography to astrophotography. Unless the most suitable focusing screen for a given photographic purpose is available, the full potential of a system camera cannot be utilized. For fast, accurate focusing, the OM System Finder Group offers the unique Varimagni Finder with a magnification selector, the Eyecup 1/2 that accepts a variety of Dioptric Correction Lenses, Eye coupler, etc.

Olympus OM Finder Group Accessories

* Varimagni Finder This unique and exclusive unit for the OM System combines the two functions of angle finder and magnifier, incorporating 9 lens elements and a reflector. It fits over the camera's eyepiece, and can be adjusted for individual eyesight. Its eyepiece tube is ratable through 360°, use in low level and 90° angled shots. The two-stage, one-touch switching system offers both a 1.2x magnification image cover enlargement of the central portion for critical focusing. For photomicrographic use, insert the Eye coupler between the camera and Varimagni Finder.

* Eye coupler: Connects the Varimagni Finder to the OM Body for photomicrography. It also ensures full coverage of the bright viewfinder field for use of the Eyecup 1 in conjunction with the Motor Drive 250 Film Back.

* Eyecup Attached by sliding over the OM Body eyepiece. With its attached rubber hood it prevents stray light from entering through the eyepiece, an essential requirement in light measuring. The Eyecup 1 is provided with a slot for Dioptric Correction Lenses. While there are two types of eyecup, Eyecup 1 & 2. Version 1 is made out of metal and rubber, the newer Eyecup 2 consists of plastic and rubber, and has a recticular shape just like the viewfinder. It has a slot for insertion of dioptric correction lenses. Note: Dioptric correction lenses 2 come with eyecup.

* Focusing Screen 1 (More info for Focusing Screens) Interchangeable Focusing Screens are often thought of as a luxury feature in 35mm photography. Yet the Standard Focusing Screen 1-13 is often inconvenient or difficult to use, and in some circumstances it is quite unsatisfactory.

With super-telephoto lenses for instance, the microprism becomes excessively dark. With the high magnifications of macrophotography and photomicrography, it is impossible to focus.

: Dioptric correction lenses 2 come with eyecup.
* Dioptric Correction Lens 1 Available in 8 diopter correc tions: +2, + 1, 0 (for hypermetropia); -1, -2, -3, -4, -5 (for myopia). Used to match the photographer's vision, and especially necessary in fine focusing for high magnification. Fits into the Eyecup 1.




1 -1
(for most lenses)


Standard type, suitable for general photography. Fast and accurate focusing is done on the central microprism spot as well as on the surrounding matte area. When a lens with a maximum speed of F5.6 or slower is used, the microprism darkens and focusing must be made on the matte area. The meter needle indicates proper exposures.

1 -2
(for standard &
telephoto lenses)


Suitable for general photography in conjunction with a standard or telephoto lens. Focusing Is done on the microprism spot as well as on the matte area. When a lens with a maximum speed of F8 or slower is used, the microprism spot darkens. The meter needle indicates proper exposures.

1 -3
Split image-matte
(for most lenses)


Suitable for general photography ensuring critical focusing, and ideal for photographers who prefer the split-field and coincidence type focusing. When a lens with a maximum speed of F5.6 or slower is used, the split prism darkens. The meter needle indicates proper exposures.

1 -4
All matte type
(for most lenses)


Suitable for general photography and ideal for photographers who prefer a view field free from microprism or split prism and for those who are accustomed to focus using matte area. Also suitable for super telephoto photography and close-up photography in conjunction with macro lenses and Auto Bellows. The meter needle indicates proper exposures.

Mioroprism-clear field type
(for wide angle &
standard lenses)


This transparent screen provides an exceptionally brightfinder image. Highly suitable for snapshots using wide angle lenses. The lack of matte surface means depth-of-field effects cannot be ascertained. The meter needle does not indicate proper exposures, because its movement varies depending on the lenses used.

field type
(for standard &
telephoto lenses)


This screen provides an extremely bright finder image. Focusing is done on the microprism spot. The lack of matte surface means depth of-field effects cannot be ascertained and the meter needle does not indicate proper exposures.

1 -7
field type
(for super
telephoto lenses)


Developed primarily for use with super telephoto lenses, this clear field screen provides an extremely bright finder image. The microprism spot remains bright even with a lens whose maximum speed is F 11. The lack of matte- surface means depth-of-fleld effects cannot be ascertained, the meter needle does not indicate proper exposures.

1 -8
All matt type
(for telephoto lenses & astronomical telescopes)


This screen s ideal for use with super telephoto lenses of 300mm or more in focal length, or for astrophotography. The extreme fineness of the matte surface permits outstanding field definition. More accurate focusing may be achieved by the use of the Varimagni Finder.

Clear field type
(for endoscopic photography)


Designed for use with OLYMPUS fiber optic encloscopes. This condenser type screen without fresnel lens requires no focusing when a special adapter couples the camera with the fiberscope. Exposure is made automatically by the light supply.

(for shift lens)


The grid lines engraved on the all-matte surface are used for vertical and horizontal picture alignment. Though originally designed for architectural photography with the shift lens, it is also suitable for general and super-telephotogiraphy, and close-up / macrophotography with macro lenses and Auto Bellows.

Cross hairs-matte
(for close up & macrophotography)


Highly advantageous for close-up and macrophotography with Auto Bellows and extension tubes. For focusing in low magnification close up photography, use the matte area and in macrophotography greater than life size, use the double cross hairs the same way as with the - 12.
The meter needle indicates proper exposures, but depending on the conditions of the specimen, the reading must be compensated for.

Cross hairs-clear
field type
(for photomicrography & macrophotography greater than life site)


The transparent screen offers the photographer focusing with an unusually bright finder image. To focus, first correct your diopter using a dioptric correction lens or Varimag ni Finder so that" each
line of the double cross hairs can be seen clearly and separately.
Then bring the specimen into focus. The meter needle indicates proper exposures, but depending on the specimen's conditions, the reading must be compensated for.

(for most lenses)


Most suitable for normal photography, this screen assures pinpoint focusing. The central split-image range f inder is enc lecled by a microprism collar. Since the outer area has a matte surface, the screen can be used in the same way as the standard 1-1 and 1-3 Screens. When a lens with a maximum speed of F5.6 or slower is used, the prisms darken and the focusing must be made on the matter area.

image-matte type
(for most lenses)


Most suitable for normal photography. The central split-image range finder, encircled by a microprism collar, is inclined 45 degrees to allow easy focusing on subjects with vertical or horizontal lines. When a lens with a maximum speed of F5.6 or slower is used, the prisms
darken and focusing must be made on the matte area. The meter needle gives correct light readings.

Olympus OM
Flash Photo Group (OM Flash Photography) Flash is your own private "sun" when you take pictures at night, indoors, or outdoors for daylight fill-in. In fact, for most of the period of the product cycle of the OM system, flash is one of the strongest asset of the OM system. The mechanical OM-1 may not be enjoying the full benefits of the electronic counter part of OM-2(n), OM-2S or the OM-4's TTL flash, but has also taken advantage of the strength the flash system Olympus has constructed over the years that centered around the TTL OTF flash exposure metering system.

OM System Flash photo Group renders choice of 6 different flash units including the latest F280 (Limitation on older OM SLR models) and most well known models such as Electronic Flash T32 and T20. Chart on the right was an outdated reference system chart where OM-1n was one of the two Olympus's flagship bearer during the mid '70 towards the early part of the '80 --->>>

PDF File (

Quick Reference Guide: Olympus T45, T32, T20, F280, S20, T10 Ring, T8 Ring, T28 Macro Single, T28 Macro Twin, TTL Quick AUTO 310, Quick AUTO 300, PS200, PS200 Quick and T Power Control Version 1

The impressive T32 offers high performance - a maximum ASA 100 guide number of 32 (in meters) or 104 (in feet) with an angle that virtually covers the picture area of a 24mm super-wide angle lens, and is provided with a built-in bounce mechanism. The T20 is extremely compact and features a maximum ASA 100 guide number of 20 (in meters) or 66 (in feet) with an angle that covers the picture area of a 35mm wide angle lens. The T32 (or T20), when used with the OM-2, is an OTF (off-the-film) fully automatic electronic flash unit. Even the conventional dial settings (auto/manual switching, aperture setting and ASA film speed setting) "auto" flash units are unnecessary. By re- versing the back plate of the flash unit, it can be used as a normal auto/manual flash unit for use with the OM-1, permitting 3 aperture values of F4, F5.6 and F8 (with T20, two apertures of F4 and F8) at ASA 100 for normal auto f lash as wel I as two manual settings - GN16 (on T32 only) and GN32 (GN 20 with T20).

Flash Photo Group Unit * Electronic Flash T32 The T32 is the center of the modular OM Flashphoto system. Used alone on the camera, the built-in bounce mechanism allows the flash surface to be tilted 90° up and 15° down. This angle range can be further extended when the T32 is slipped into the Power Bounce Grip 2.

Operates on four 1.5V AA (self-contained) or C batteries (inside bounce grip) including Ni-Cd, or AC house current. 104 x 81 x 70mm (4.1 " x 3.2" x 2.8"), 320g. ( 11.3 oz.) less batteries. Instruction Manual for OM T32 Flash is available

* Electronic Flash T20 Extremely compact and lightweight. Like its sister unit T32, the T20 is an energy-saving, fully automatic system flash unit capable of TTL Auto, normal Auto and manual flash and provides other flash and provides the flash charge/correct exposure indication in the OM camera viewfinder (but with no built in bounce mechanism).Operates on two 1.5V AA (self-contained) or four 1.5V C (inside bounce grip) including Ni-Cd, or AC house current. 77 x 68 x 57mm (3" x 2.7" x 2.2"), 160g. (5.6 oz.) less batteries.

* T10 Ring Flash 1 Designed principally for use with the OM System macro lenses, this unit provides full and even flash illumination at working distances far closer than possible with other flash units. Operates in conjunction with the T Power Control 1.

T10 Ringflash.jpg Filter.jpg
More: OM Macro Flash Options * Ring Cross Filter POL A cross-polarizing filter which minimizes direct reflections from the T10 Ring Flash 1 for highly reflective subject matters.

* T Power Control 1 A compact power unit for the T10 Ring Flash which mounts via accessory shoe to the top of the OM body. Offers TTL Direct "OTF" auto operation or manual flash (GN 10 and GN 4, ASA 100 in meters). Powered by 4 AA size batteries or optional AC Adapter 3.

cal1.gif cal2.gif cal3.gif

* Calculator Panel for 50mm lens
* Calculator Panel for 1: 1 Macro 80mm lens
* Calculator Panel for Macro 135mm lens Fitted on to the back of the T10 Power Control 1 to provide easy-to-read distance/ magnification/aperture exposure tables. The plate for 50mm lens comes equipped with the T10; other two types are optionally available.

*TTL Auto Multi Connector Allows multiple flash units (T32s or T20s) to be combined with the camera (OM-2N, or OM-2 in TTL Auto; OM-1N in manual mode) via TTL Auto Cords for simultaneous flash photography.

*TTL Auto Connector T20 Allows the T20 to perform off-camera flash via the TTL Auto Cord T when the Power Bounce Grip 2 is not used (i.e., handheld or tripod mounted).
* TTL Auto Cords T 0.3m, 0.6m, 2m, 5m Links the T32 and T20 electronic flash units with the OM body (via the TTL Auto Connector) when used separate from the camera. In addition to the 0.6 meter spiral cord, 0,3m, 2m and 5m cords are available.

* M. Grip Cord Connects the remote shutter release on the Power Bounce Grip 2 for operation with the Motor Drive 1 or Winder 2 units.

* Power Bounce Grip 2 An auxiliary power unit which converts the T32 and T20 electronic flash units into grip-type units.

The grip head may be angled in all directions - 90° up and 20° down, 240° to the left, 60° to the right - for maximum versatility in bounce and close-up flash. Grip section houses four 1.5V C size batteries.

* Zoom Adapter T32 Offers concentrated flash beam with the T32 Electronic Flash sufficient for telephoto lenses 135mm and longer.
filersett32.jpg* Wide Adapter - ND Filter Set T32 Special neutral density filters for the T32 Electronic Flash lamp for reducing the light intensity without affecting color and contrast.
* Color Filter Set T32 For special effects flash.

* Electronic Flash AC Adapter 3 Enables operation of the T10 Ring Flash 1 and its modeling lamp on AC current.

* Electronic Flash AC Adapter 2 Plugged into an AC wall outlet, this unit supplies a virtually unlimited number of economical flashes with the T32 (or T20).

/pouche.jpg. compart.jpg
* Lens Pouches 150/100 The Lens Pouch 150 (100) is also suitable for carrying the T32 (T20) electronic flash unit, on its own.* Compartment Case S A hard shoulder case with two adjustable partitions to accommodate the OM Body, T32 (or T20), bounce grip and bracket.

* OLYMPUS PS200/PS200 Quick These manual flash units are for use with cameras with a hot shoe mount, have the guide number of 14 (in meters) or 45 (in feet) at ASA 100 and a constant flash duration of 1/1000 sec. and deliver approx. 200 flashes. The PS200 operates on two 1.5V AA batteries (recycling time approx. 7 sec.) and the PS200 Quick on four AA batteries (2~3 sec.). PS200: 31 x 55 x 64mm (1.2" x 2.2" x 2.5"), 75g. (2.6oz.) less batteries. PS200 Quick: 32 x 73 x 71mm (1.3" x 2.9" x 2,8"), 95g. (3.4 oz.) less batteries.
previous | Next | Part 4/6 - Instruction Manual

Back to
Index Page of OM1(n) Instruction Manual

| Back | to Index Page of OM1(n)
| Back | to Main Index Page of OM1(n) & OM2(n)

Olympus OM-1(n): Main Index Page (5 Parts) | Camera Operations (6 Parts)
HTML | PDF | Main Reference Map: HTML | PDF (217k)
Olympus OM-2(n): Main Index Page (6 Parts) | Camera Operations (9 Parts)
HTML | PDF (48k) Main Reference Map: HTML | PDF (203k)
Olympus OM-2SP: Camera Operations | Other Issues
Specifications: HTML | PDF | Main Reference Map: HTML | PDF

Shared Resources: Supplementary articles: TTL Metering, Depth of Field, Shutter Speed & Aperture
Motor Drive and Power Winder: Main Index Page (4 Parts)
Motor Drive 1 | Motor Drive 2 | Winder 1 | Winder 2
Flash Photography:
Main Index Page (4 Parts)
T45 | T32 | T20 | F280 | S20 | Qucik AUTO 310 | QA300, 200, 200S
Main Index Page (3 Parts)
Macro Flash Units:
T10 Ring Flash, T28 Twin, T28 Single, T8 Ring Flash
Databack 1-4 | Screens | Finder Accessory | Remote | Cases

Zuiko Lenses: Construction is in progress..

Glossary of Photography
A good external source for
used Instruction Manuals for various OM SLRs and Accessories.

| Message Board | for your favourite Olympus OM-1(n) and OM-2(n) series SLR Camera models
| Message Board | for your Zuiko Optics in a shared environment
| Message Board |Specifically for Dispose or Looking for OM Photographic Equipment

MIR Logo
Home - Photography in Malaysia

Copyright © 2000. leofoo ®. MIR Web Development Team.

Maintainers for OM Site & Message Board: Mr. Rick Oleson <>; Mr. Bruce hamm <bhamm@magma,ca>; Mr. Simon Evans <>; Mark Dapoz <>;

Credit: My old time buddy, Ahmad Ikram, Dr of Rubber Research Institute (RRI), Malaysia who shares the same passion with me and also lending his OM-1n, OM-4 and the Motor Drive 1 to me for preparing some images in this site; Mark Dapoz <>for reminding some broken links; Mr Poon of Foto Poon, Ipoh, Mr Richard, Ampang Park, Mr Lim and Miss Jenny of Foto Edar for their generosity for their OM1(n), OM2n camera and some Zuiko lenses. Mr Hans van Veluwen for mistakenly using some content earlier from his OM website; J Sorensen for providing some useful images to rectify some technical "flaws"; Mr Gen Holst for helping during the early stages of development of this OM site; Mr KKLow for some of his earlier images on the OM-1appeared in this website; Miss Wati and Mirza for helping me to convert this Operation Manual into a HTML format. Mr MCLau for rectifying some mistakes made on the earlier preview sites. Site created 'unfortunately' again with a PowerMac. A personal tribute to the creator of the OM system and also a site dedicated to all the fans of Olympuses and Zuiko Optics worldwide. Some of the content and images appeared in this site were scanned from OM official marketing leaflets, brochures and instruction manual(s) for educational purposes. Olympus is a registered tradename of Olympus Optical Inc., Japan.