Olympus OM system close-up and macro equipment

Introduction

Olympus has made at least 4 ranges of photographic eyepieces, each suited to different types of objective.

Olympus P, FK and NFK Photo Eyepieces

To use an Olympus OM camera body with a microscope, the Photomicro Adapter L is used, either directly or via one or more additional adapters. Any OM body can be attached, but for photomicrography the 1-12 focusing screen is almost essential, and so the fixed-screen bodies are not suitable. The top of the Adapter has the same fitting as the rear of a lens, and attaches to the camera body in the normal way. The bottom of the Adapter is intended to clamp on to the standard Olympus circular dovetail fitting for attaching cameras to microscopes. This dovetail fitting is found on some Olympus microscopes, on some Olympus photo tubes, and on the eyepiece adapters

• PE Eyepieces
• NFK Eyepieces
• FK Eyepieces
• P Eyepieces

PE Eyepieces

This is the most recent range of photo eyepieces, designed for use with trinocular versions of Olympus compound microscopes that take the UIS series of infinity-corrected objectives (including the AX, BX2, CX2, IX2 and MX series), and with trinocular versions of the Olympus SZX7, SZX9 or SZX12 infinity-corrected stereo microscopes.

The PE photo eyepieces are available with 2×, 2.5×, 3.3×, 4× and 5× magnifications; the 2.5× eyepiece is intended for use with 35 mm cameras.

PE	2×	2.5×	3.3×	4×	5×
Microscope ref.	2-U710	2-U720	2-U730	2-U740	2-U750
Film format	Video or 16 mm cine	35 mm (24×36 mm)	Polaroid Type 100 (3¼″×4¼″)	Large format	Large format

For 35 mm film, the picture magnification on the film is determined by the formula PE eyepiece power × objective power. The large format camera backs include a relay lens, and the picture magnification on the film is determined by the formula 3 × PE eyepiece power × objective power.

NFK Eyepieces

These compensating photo eyepieces were designed for use with the long-barrel 45 mm parfocal objectives for Olympus trinocular compound microscopes such as the Vanox (AHB-LB) and BH-2, and with trinocular versions of the SZH, SZ4045, SZ6045 and SZ1145 stereo microscopes.

Olympus 2.5×, 3.3× and 6.7× NFK Photo Eyepieces

They are also used with the earliest infinity-corrected objectives for industrial/metallurgical applications, prior to the UIS range. These eyepieces can also be used with older trinocular microscopes, with the aid of the PM-ADF Eyepiece Adapter.

NFK	1.67× LD 125	2.5× LD 125	3.3× LD 125	5× LD 125	6.7× LD 125
Length	74.5 mm	63.8 mm	56.1 mm	51.5 mm	44.0 mm
Diameter (top)	24.8 mm	24.8 mm	24.8 mm	24.8 mm	24.8 mm
Diameter (body)	23.1 mm	23.1 mm	23.1 mm	23.1 mm	23.1 mm
Microscope ref.	2-LC898	2-LC894	2-LC895	2-LC896	2-LC897
US catalog no.		105-060	105-061	105-062	105-063
Film format	Video or 16 mm cine*	35 mm (24×36 mm)	Polaroid Type 100 (3¼″×4¼″)	Large format	Large format

*The NFK 1.67× eyepiece was intended for use with cine and video cameras that use a C-mount, and does not cover the full frame of 35 mm film. However, it has been found to work well with digital SLRs that use a sensor smaller than 35 mm, including Four Thirds (13.5×18 mm) and APS-C (22.2×14.8 mm).

The 2.5× eyepiece is intended for use with 35 mm cameras. The 3.3×, 5× and 6.7× eyepieces can also be used when higher magnification is required.

For 35 mm film, the picture magnification on the film is determined by the formula NFK eyepiece power × objective power. The large format camera backs include a relay lens, and the picture magnification on the film is determined by the formula 3 × NFK eyepiece power × objective power.

Instruction booklet

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

1. Attach the Eyepiece Adapter PM-ADF to the photo tube of microscope, and clamp with screw provided.
2. Insert the selected Eyepiece NFK into the Eyepiece Adapter PM-ADF.
3. Fit the Adapter L over the Eyepiece Adapter PM-ADF pushing all the way down, and clamp the entire camera assembly.

OLYMPUS
OLYMPUS OPTICAL CO., LTD.
43-2 Hatagaya 2-chome, Shibuya-ku, Tokyo, Japan

FK Eyepieces

These compensating photo eyepieces were designed for use with the short-barrel 36.65 mm parfocal objectives for compound microscopes such as the Vanox (AH), BH, CH, EHT and FHT. The Vanox has a built-in eyepiece adapter, but other trinocular microscopes can use the PM-ADF Eyepiece Adapter.

Olympus 3.3× and 5× FK Photo Eyepieces

The 2.5× eyepiece is intended for use with 35 mm cameras. The 3.3×, 5× and 6.7× eyepieces can also be used when higher magnification is required.

FK	2.5× 125	3.3× 125	5× 125	6.7× 125
Length	66.2 mm	54.8 mm	44.4 mm
Diameter (top)	24.8 mm	24.8 mm	24.8 mm
Diameter (body)	22.8 mm	23.2 mm	23.2 mm
Microscope ref.
US catalog no.	205-659
Film format	35 mm (24×36 mm)	Polaroid Type 100 (3¼″×4¼″)	Large format	Large format

For 35 mm film, the picture magnification on the film is determined by the formula FK eyepiece power × objective power. The large format camera backs include a relay lens, and the picture magnification on the film is determined by the formula 3 × FK eyepiece power × objective power.

Instruction booklet

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

1. Attach the Eyepiece Adapter PM-ADF to the photo tube of microscope, and clamp with screw provided.
2. Insert the selected Eyepiece FK into the Eyepiece Adapter PM-ADF.
3. Fit the Adapter L over the Eyepiece Adapter PM-ADF pushing all the way down, and clamp the entire camera assembly.

OLYMPUS
OLYMPUS OPTICAL CO., LTD.
43-2 Hatagaya 2-chome, Shibuya-ku, Tokyo, Japan

P Eyepieces

These eyepieces are for use with the E and F compound microscopes and with the SZ-III-Tr and X-Tr trinocular stereo microscopes, and with other microscopes that have a vertical monocular tube. They are used with the the PM-ADP Eyepiece Adapter.

Olympus 7× P Photo Eyepiece	P eyepiece with PM-ADP on Olympus BH-TR45 trinocular head

For 35 mm film, the picture magnification on the film is determined by the formula P eyepiece power × objective power × approximately 0.5.

Instruction booklet

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

1. Fit the Eyepiece Adapter PM-ADP to the photo tube pushing all the way down.
2. Insert the Eyepiece P into the photo tube.
3. Pressing down the eyepiece against the photo tube slightly, raise the Eyepiece Adapter until it contacts with the eyepiece flange (be sure the eyepiece flange is in contact with both the photo tube and Eyepiece Adapter) and lock the adapter firmly with clamping screw.
4. Fit the Adapter L over the Eyepiece Adapter pushing all the way down and clamp the entire camera assembly.

OLYMPUS
OLYMPUS OPTICAL CO., LTD.
43-2 Hatagaya 2-chome, Shibuya-ku, Tokyo, Japan

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Created 2nd May 2004   —   Updated 9th January 2010
Copyright © 2004–2010 Alan Wood