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Selecting the Connecting Unit The Photomicro Group offers a wide selection of connecting units for the utmost precision in photomicrography. As photomicrography requires that the camera be attached to the microscope, it is very important to minimize vibration resulting from the camera's shutter mechanism. The affects of shutter vibration vary with the level of magnification being employed, and depending upon the type of photography you are doing, different combinations of connecting units are required. For a total magnification of 250X or lower (using a low magnification objective 20X), the simple-to-use Photomicro Adapter L can be used. At higher magnifications (with an objective magnification of 40X and higher where the affects of shutter vibration are strong) Photomicro Adapter H is necessary. Also, it is imperative to you that vibrations be reduced to an absolute minimum, each adapter can be used with the PM-PSS Photomicrographic Supporting Stand. In addition, other adapters must be attached to the microscope side. These vary with the type of eyepiece being used, with Eyepiece Adapter PMAOP required for P Eyepieces, and Eyepiece Adapter PM-ADF required for the NFK (FK) Eyepieces which were especially developed to render high resolution images for photomicrography. In addition, Eyepiece Adapter G is available for attaching eyepieces to one of the eyepiece sleeves of stereo microscopes. The chart on the right gives the basic combination of Photomicro units for photornicrography with the OM System. Basically for magnifications below 20X, Photomicro Adapter L is used with other units as needed, while for magnifications of 40X or greater, Photomicro Adapter H is used with other units as shown.

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This system requires the Photomicro Adapter H and 35mm SLR Adapter PM-D35S for mounting on a microscope with the Photomicrographic Supporting Stand PM-PSS or Eyepiece Adapters. The light path selector control can be adjusted to transmit all light to the observation eyepiece for focusing and composing in low light situations, to divide light between viewing and film planes, or to send all light to the light measuring port, which accepts the photosensitive cell of the Photomicrographic Meter Model EMM-7. The OM4 series (OM2 series) does not require the EMM-7 because of its built-in automatic exposure control system.

Easy interchangeability of many accessories permits use of various large format film sizes as well as 35mm sizes. The PM-10-AD requires the Photomicro Adapter H and 35mm SLR Camera Adapter PMD35S to mount the OM body. Automatic Exposure Body PM-PBS* The PM-PBS Exposure Body automatically determines the correct exposure time, controls color temperature regulation, compensates for reciprocity failure, etc. in conjunction with the Automatic Exposure Control Box PM-CBAD and Color Temperature Regulator PM-CTR. The PM-PBS requires the Photomicro Adapter H and 35mm SLR Adapter PM-D35S to mount the OM body. Automatic Exposure Control Box PM-CB AD* This is a control unit for the PM-PBS. Its console cabinet is provided with for automatic exposure, dials for automatic determination of Photomicrographic exposure, color temperature regulation of the light source, reciprocity failure correction, etc. depending on specimen conditions. Dial settings are digitally indicated on LED display for easy monitoring and exposure time in 3 stages (estimated, remaining and actually exposed). Focusing Telescope PM-VS* Mostly used with objectives from 10X to 100X for accurate focusing in conjunction with either the Automatic or Manual Exposure Body. Provided with a double cross-line diopter adjustment, four fixed frame reticles indicating 35mm, 120 roll film, 3-1/4" x 4-1/4" and 4" x 5" film sizes.

To view the entire field through the eyepiece for framing and composing, set the switch to "1.2x". Then, for critical focusing, turn to "2.5x". The Eye coupler should be used between the camera and the Varimagni Finder. Finder accessories Section Eyecup 1 Designed to prevent glare and loss of contrast caused by stray light hitting the eyepiece. Made of rubber for soft contact with the eye socket. A dioptric correction lens can be fitted into a slot in the Eyecup and is held by a threaded retaining ring. The OM body requires use of the Eyecup 1 or Varimagni Finder for photomicrography. Dioptric Correction Lenses 1 If the Varimagni-Finder is not available, Dioptric Correction Lenses should be used when necessary to assist focusing. These lenses snap into a slot provided in the Eyecup. They are available in 8 different diopters: +2, +1, 0 diopters for long sight; -1, -2, -3, -4 and -5 diopters for short sight.

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OM-Mount Photomicro Adapter L For low magnification photomicrography with the OM body, the Adapter L is used to mount an eyepiece on the camera. Since each eyepiece requires an eyepiece adapter for use with Olympus microscopes except the Universal Research Microscope VANOX and system microscope SH2, the Adapter L accepts the Eyepiece Adapter on its slip-on mount and the OM body on its bayonet mount. OM-Mount Photomicro Adapter H

Vari-magni Finder The Varimagni Finder magnifies the viewfinder image, and rotates through 3600 allowing accurate focusing from any position, including waist-level and downward viewing positions. Images reflected on the finder glass can be changed from 1.2x to 2.5x magnification by a convenient selector switch.

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For mounting the OM body on the Photomicrographic System PM-10, automatic or manual version, or the Macrophotographic Equipment PMT-35 in conjunction with high power objectives, the Adapter H is used together with the 35mm SLR Camera Adapter PM-D35S.

The Adapter H also permits attachment of the OM body to the Olympus Motorized Operation Microscope Model OMB for recording of microsurgery. 35mm SLR Camera Adapter PM-D35S This is used with the OM-Mount Photomicro Adapter H to connect the Automatic or Manual Exposure Body, PM-PBS or PMPBM, of the Model PM-10 to the OM body for Photomicrographic work.

When using the Motor Drive 1 in conjunction with the 250 Film Back 1, the Eyecoupler is required for mounting the Eyecup 1 to the camera. | Previous | NEXT | 2/3 Instruction Manual how to use the Adpter H & L

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To focus, first correct your visual acuity with Dioptric Correction Lenses or the Varimagni Finder in conjunction with the Eye coupler, so that the double cross hairs can be seen clearly and separately.

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The weight and solidity of a separate stand alone, tends to reduce any transmitted vibration. Other bench vibrations are absorbed by the stand's rubber feet and a rubber mat minimizes transmission of vibration from the microscope. Camera and microscope operation is not impaired by the use of the stand, and all controls remain fully accessible. The Photomicro Adapter L or H is required for use with the OM body. Automatic Photomicrographic System PM-10-AD* The PM-10-AD is one of the main microscope connecting units. The built-in vibration proof electronic shutter permits a wide range of automatic exposures from 1/100 sec. to 30 minutes (ASA100) and is especially suitable for color photography. The PM-10-AD consists of various units, including the Automatic Exposure Body PMPBS, Control Box PM-CBAD, etc., for film selection, speed setting, fine adjustment of exposure times, compensating for specimen conditions, color temperature adjustment for the the light source, reciprocity failure correction, etc. with LED readouts for easy monitoring and checking even in a dark room.

*NOTE: Contact the Olympus Microscope Distributors for further information. Selection of Viewfinder Units The single lens reflex camera viewfinder plays a vitally important role in photomicroqraphy. The photographer looks through the finder to adjust focus, lighting and composition. In photomicrography, the picture magnification is extremely large compared with ordinary photography. The greater the image magnification, the more conspicuous the graininess of the focusing screen, and the more difficult it is to focus and ensure proper lighting. For this reason, the Focusing Screen 1-13, usually mounted on the OM body as standard, should be replaced with the Focusing Screen 1-12, specially designed for photomicrography. This transparent screen with a cross hairs reticle in the center provides an unusually bright clear viewing area. To focus with the Focusing Screen 1-12, correct your diopter to see the cross hairs and bring the subject into focus. When the sharp images of the cross hairs an the subject are seen simultaneously, the subject is correctly focused. Focusing Screens 1-12 Among the 14 interchangeable focusing screens, the Cross Hairs Clear Field 1-12 is exclusively used in photomicrography. This transparent screen assures an unusually bright field of view with high contrast. Focusing Screens Section

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We cable release has a time exposure locking device. Among the focusing units available, the Focusing Telescope PM-VS is recommended for objectives higher than 4x. Photomicrographic Exposure Motor EMM-7* This exposure meter assures accurate control of both exposure and color temperature with the Manual Exposure Body PMPBM ' . Complete with exposure and color temperature probes, color compensating filters and adapter for use with the OM body. Focusing Magnifier FT* Magnifier FT enables the photographer to magnify the central part of the image and bring the subject into sharp focus in conjunction with the Focusing Telescope. The front lens portion of the Focusing Magnifier can be displaced laterally to permit focusing on the frame reticles of the Focusing Telescope. The mounting ring fits on the front lens portion.

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Copyright © 2000. leofoo ®. MIR Web Development Team. Credit: My old time buddy, Ahmad Ikram, Dr of Rubber Research Institute (RRI), Malaysia who has loaned me his copy of the manual to prepare this section of the OM site; 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.

In addition, various photo eyepieces and provision for attachment of large format cameras are available. Photo eyepieces NFK (FK) are specially designed for photomicrography with the Model PM-10 system. The eyepiece powers are 2.5X, 3.3X, 5X and 6.7X. Each magnification is computed to focus an actual image at a projection length of 125mm -- the same plane as the 35mm film plane, compensating ideally for Photomicrographic aberrations. Magnifications for large format cameras are three times greater than for 35mm cameras; for instance, NFK (FK) 2.5X becomes 7.5X, and NFK (FK) 6.7X becomes 20X. Manual Exposure Body PM-PBM* Provided with an integrated mechanical shutter in a vibration proof rubber mount, permitting shutter speeds from 1/250 to sec and "B", 3 position light path selector knob and quick clamp mount for the Focusing Telescope. A light measuring port accepts the photocell of the Olympus Exposure Meter EMM-7.

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The appropriate choice of Dioptric Correction Lenses eliminates the need for eyeglasses. Eyecoupler The Eyecoupler is used with the OM body and the Varimagni Finder for photomicrography. It attaches between the camera and the Varimagni Finder, extending the Finder away from the camera for more convenient viewing.

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Eyepiece Adapters PM-ADF, PM-ADP & PM-ADG-3* These adapters are used between eyepiece and microscope. They are available in three types: Adapter PM-ADF for photo eyepieces NFK or FK, Adapter PMADP for eyepieces P and Adapter PM-ADG-3 for eyepieces G, Of these three eyepieces, the photo eyepieces "NFK"(FK) are exceptionally well suited for photornicrography with the OM body. * NOTE: Contact the Olympus Microscope Distributors for further information. Photomicrographic Supporting Stand PM-PSS** This is a convenient unit for photomicrography at high magnifications. The unit supports the entire weight of the camera, isolating it from the microscope.

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The PM-10-M is a popular manual version of the PM-11 0, consisting of 8 main units, that includes the Manual Exposure Body PM-PBM, Eyepiece Adapters, Focusing Telescope, Magnifier, etc. The PM10-M, when used with the OM-1 body in manual operation, facilitates photomicrography especially at high magnifications.