Additional information on Olympus Zuiko Lenses
Zuiko Telephoto lenses - 100mm f/2.0 & 100mm f/2.8 - Part One

HTML Page (44k) Loading ...

<<<--- A Zuiko AUTO-T 100mm f/2.8 lens. Copyright-free images collection. leofoo ®2003.
A 100mm telephoto lense has an image size on film measuring double than a standard 50mm ( (A 50mm standard lense covers about four times the subject area of the 100mm lense. The 100mm covers about four times that of the 200mm). Its angle of view is about half that of a 50mm lense and it fills the 35mm frame with one quarter of the area that would be included in the same scene made with a 50mm lense. Lenses starts from 100mm onwards would realize the differences in image size on film with lenses of shorter focal length. Perspective compression effect in a 100mm telephoto is not overpowering and the great versatility provides possibly is a main reason why it is so appealing to so many photographers. Besides, depth-of-field of a 100mm lense is substantially less than a comparing 50mm lense at the same focusing distance at the same working aperture, it provides a very pleasing visual effect when compared with lenses of shorter focal length.

100mmf2flashsetup.jpg (33k) Loading ...
There are two Zuiko lenses offer at this focal length. An E-Zuiko AUTO-T 100mm f/2.8 has been around since early days of introduction of OM system. The lense has remained literally unchanged in its optical composition all these years but may have went through various stages of refinement involved the lense coating process. Another late inclusion of a 100mm Zuiko telephoto was actually occurred quite late in 1984. Where Olympus introduced a fabulous tele-lense with a very fast lense speed, Zuiko AUTO-T 100mm f/2.0 lense in an aggressive attempt to update the ZUIKO lens group to supplement the few exciting next generation OM SLR bodies.

<<<--- Image was scanned from a 1985's OM-4 Sales Catalogue

I do remembered the Zuiko 100mm f/2.0 was only introduced after Olympus officially introduced the multi-spots metering capable Olympus OM-4, primarily because it was much publicized as one of the two* 35mm lense under 180mm focal length in the market to use ED glass in its optical composition to minimize chromatic aberration. Anyway, both lenses have established themselves a good reputation as a top class optic capable of delivering superlative image quality. * Another was a USD2,695-00 Leica APO-MACRO Elmarit-R 100mm f/2.8.

100mmf2OMe.JPG (33k) Loading ......
Zuiko AUTO-T 100mm f/2.0

This lense was among a series of exciting new generation 'high end" ZUIKO optic Introduced between 1982/84. Blending various good features in an extraordinary fast lense speed, lightweight, compact, superbly crafted built-quality, excellent handling, a very practical focal length with a highly acclaimed class A optical performance it can deliver - Olympus has created an instant ZUIKO classic !

<<< -- Credit: Image courtesy of Mr. Attila Lorincz, code name:"Attila® at Ebay"<>. Images copyright © 2003. All rights reserved. Please respect the visual property of the contributing photographer.

Focusing features floating rear elements to counter and suppress distortion to absolute minimal level. While Extra-Low Dispersion (ED) glass and special dispersion glass with high refractive index and low dispersion optical properties are used in the front lense elements to provide extremely high resolution and contrast images. The extra-low dispersion glass ("ED") with superior chromatic-aberration-correcting properties, enables secondary colour spectrum in particular, blue and red light rays be brought to focus at the same plane to offer images with crisps, sharp details and faithful colour reproduction. There are only TWO known Zuiko lenses below 100mm focal length which use ED glasses thus far in their optical composition, other than the Zuiko AUTO-T 100mm f/2.0 discussed here, another ZUIKO lense was actually a very fast speed Zoom lense, the ZUIKO 35-80mm f/2.8ED which incidentally, was introduced at a very late stage back in 1996. Incidentally, the Zuiko AUTO MACRO 90mm f/2.0 which offers as alternative to this lense as it has the same lense speed at f/2.0 but its main strength is being a true MACRO lense which can focus from infinity to 1:2 life size reproduction at its closest working range.

joelwilson2.jpg (58k) Loading ....
Jumbo Rocks, Joshua Tree National Park

<<< -- Credit: Image courtesy of Mr JOEL Wilcox® <>. Joel has an excellent landscape photographic website on his own. Image Copyright © 2003. All rights reserved. Please respect the visual property of the contributing photographer.

Optically, it uses a unique optical formula which comprises of a 7 elements in 6 groups design with displacement of ED elements at the front and incorporating a floating rear elements mechanism at its rear. The closest helical focusing distance is 0.7m and at this range, it yields an impressive reproduction ratio of 1/5 - easily rank among the highest in its class among all normal telephoto lenses. With a picture angle diagonally at 24° and a generous aperture range from f/2.0 ~ f/22, the lense provides seven steps of aperture values for extended creative depth of field control. Based on OM standard, this lense weighs considerably at half a kilogram and almost twice of its slower counterpart at f/2.8. But it offers a good weight distribution when mounted on any of the MF OM body and the weight factor actually projects a rigid, rock steady feel with quality feel all over.

100mmf2OMc.JPG (28k) Loading ... 100mmf2OMd.JPG (28k) Loading ...
<<< --- Credit: Image courtesy of Mr. A. Lorincz "Attila"® <> Image copyright © 2003. All rights reserved. Please respect the visual property of the contributing photographer.

In operation, the fast aperture provides an extremely bright finder image for viewing and focusing. While careful focusing is always important, depth-of-field control with smaller apertures can often help to overcome minor focusing errors - in particularly, useful when shooting fast pace photography and no time lag for re-adjusting focus.

greg3.JPG (51k) Loading ...
Bear Mountain Bridge, New York

This fall scene was taken from an overlook on the west side of the Hudson River in Bear Mountain State Park.  I waited until the sun had just set and took a long (about 1 minute) exposure to get the blurred effect of the reflection on the water.

<<< -- Credit: Image courtesy of Mr Greg Logiodice® <>. Greg has a website on his own. Image Copyright © 2003. All rights reserved. Please respect the visual property of the contributing photographer.

Well, overall, its main drawback is its price. At USD700.00 - which commands an asking price more than double than an equivalent ZUIKO AUTO-T 100mm f/2.8 with a full f-stop slower in maximum aperture. When you compared other ED-glass lenses such as a MF Nikkor 180mm f/2.8s ED which retails at about the same, this price of this 100mm lense seems to be on the high side. Frankly, I notice prices of OM hardware have gradually being adjusted upwards over the years where a few years earlier, this lense has a far cheaper retailed price between USD550-00 an unit and it seems prices have gone up, huh ?... this has made it less appealing as an affordable possession for most photographers, however, this great ZUIKO telephoto packs some of the best of optical technologies by Olympus inside its casing. So, even if it has a seemingly high price tag, there are not short of buyers who may have appreciate the true value stealth behind the price tag.


Lense type: Telephoto lense
Focal length
: 100mm
Lense construction: 6 groups, 7 elements
Angles of view: Diagonal: 24°

Distance scale: (m) 0.7m to infinity (OO)

100mmf2optic.jpg (16k) Loading ..
Focusing: Straight Helicoid
Aperture range (Minimum and maximum): f/22 ~ f/2.0
Diaphragm: Automatic
Minimum Photographic Range:
18cm x 12 cm
Filter attachment size / Filters
: 55mm screw-in type
Overall Length: 72mm

100mmf2OMb.JPG (33k) Loading ...
Maximum diameter: 70mm
Lense Hood: Built-in
Weight: 500g (17.6 oz)
Compatible Tele-Converter:
Recommended Focusing Screens: 1:1*, 1:2*, 1:3*, 1:4*, 1:5#, 1:6#, 1:10*, 1:13*, 1:14*
*Compatible. Focusing and exposure accuracy remains but at smaller aperture with the use of high shutter speed, microprism, corners of the screen and split image may darken. # Compatible, they provide accurate focusing but exposure error may occur in manual mode for OM-1 and OM-2 series models. On AUTO, exposure accuracy remains, but the meter needle may not indicate correct shutter speeds. ## More info on "Picture Angle" or make use of the Glossary section in PIM site..

| previous | NEXT | 1/2 An alternative high performance ZUIKO lense at 100mm with a slower maximum lense speed at f/2.8 and cheaper entry cost

ZUIKO Telephoto lenses |
85mm | 100mm | 135mm | 180mm | 200mm | 250mm | 300mm | 350mm | 400mm | 500mm REFLEX | 600mm | 1000mm

A Brief overview on Zuiko Optics
Zuiko Fisheye Lenses
8mm f/2.8 Circular Fisheye | 16mm f/3.5 Full Frame Fisheye
Zuiko Ultra-Wideangle Lenses
18mm f/3.5 | 21mm f/2.0 | 21mm f/3.5 | 24mm f/2.0 | 24mm f/2.8
Zuiko Wideangle Lenses
28mm f/2.0 | 28mm f/2.8 | 28mm f/3.5 | 35mm f/2 | 35mm f/2.8 |
Zuiko Standard Lenses
40mm f/2.0 | 55mm f/1.2 | 50mm f/1.2 | 50mm f/1.4 | 50mm f/1.8 | Zuiko 50mm f/2.0 PF
Zuiko Medium-Telephoto Lenses
85mm f/2.0 | 100mm f/2.0 | 100mm f/2.8 | 135mm f/2.8 | 135mm f/3.5
Zuiko Telephoto Lenses
180mm f/2.0 EDIF | 180mm f/2.8 | 200mm f/4.0 | 200mm f/5.0 Auto-T (brief)
Zuiko Super-Telephoto Lenses
250mm f/2.0 EDIF | 300mm f/4.5 | 350mm f/2.8 EDIF | 400mm f/6.3 | 500mm | 600mm f/6.5 |1000mm f/11.0
Special application Zuiko optics:
24mm f/3.5 Shift | 35mm f/2.8 Shift | 500mm f/8 Reflex | AF Zoom 35-70mm f/4.0 | Zuiko 50mm f/2.0 PF

Tele-Converters: 1.4X-A / 2X-A

Zuiko Macro/Close focus lenses: Zuiko AUTO MACRO 20mm f/3.5 | Zuiko AUTO MACRO 20mm f/2.0 | Zuiko AUTO MACRO 38mm f/3.5 | Zuiko AUTO MACRO 38mm f/2.8 | Zuiko AUTO MACRO 50mm f/3.5 | Zuiko AUTO MACRO 50mm f/2.0 | Zuiko AUTO MACRO 1:1 80mm f/4.0 | Zuiko AUTO MACRO 90mm f/2.0 | Zuiko AUTO MACRO 135mm f/4.5

Zuiko AUTO-Zoom Lenses - Main Index page
| S-Zuiko AUTO Zoom 28-48mm f/4.0 | Zuiko AUTO Zoom 35-70mm f/3.6 | S-Zuiko AUTO Zoom 35-70mm f/4.0 | Zuiko AF AUTO Zoom 35-70mm f/4.0 | S-Zuiko AUTO Zoom 35-70mm f/3.5 ~ f/4.5 | S-Zuiko AUTO Zoom 35-70mm f/3.5 ~ f/4.8 | Zuiko AUTO Zoom 35-80mm f/2.8 ED | Zuiko AUTO Zoom 35-105mm f/3.5 ~ f/4.5 | Zuiko AUTO zoom 50-250mm f/5.0 | Zuiko AUTO zoom 65-200mm f/4.0 | S-Zuiko AUTO zoom 70-210mm f/4.5 ~ f/5.6 | Zuiko AUTO Zoom 75-150mm f/4.0 | Zuiko AUTO Zoom 85-200mm f/4.0 | Zuiko AUTO Zoom 85-250mm f/5.0 | S-Zuiko AUTO Zoom 100-200mm f/5.0 |

| Back | Index Page of OM Zuiko lenses
| Back | to Main Index Page of OM1(n) & OM2(n) Series SLRs

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

About this photographic site.

MIR Logo
Home - Photography in Malaysia

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

Maintainers for OM Zuiko Site & Message Board: Rick Oleson (Email: Website:, Bruce Hamm (, John Orrell (, Simon Evans, (; Shaun (, Andy Radcliffe (

Special thanks to: Gregory P. Logiodice, Bob Gries, Erwin Voogt, Joel Wilcox, Rick Oleson, Simon Evan and many others for granting permissions to use their images of either lenses, cameras and own pictures appeared in this Zuiko website.

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. 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 trade name of Olympus Optical Inc., Japan. Site created 'unfortunately again with an IMac.