Additional information on Olympus Zuiko Lenses
Zuiko Telephoto lenses 100mm f/2.8 - Part II

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E-Zuiko Auto-T 100mm f/2.8 & Zuiko AUTO-T 100mm f/2.8

Although its focal length is twice as long, this 100mm lense is approximately having the same size (telephoto ratio: 0.93) and weight almost comparable to a conventional standard 50mm lense. However, because of its 24
° angle of view, it produces images twice as large. It has been designed to deliver similar high resolution and contrast as a 50mm ZUIKO standard lense but it provides a more natural perspective which makes it such an ideal lense for half-body length portraiture photography. Naturally, it can be used in a wide varieties of application such as travel, scenic, candid as well as fan excellent lense for indoor studio shots.

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It is an excellent lense for isolating detail such as using it in nature or scenic photography. Photo data: OM-4 w/ZUIKO Auto-T 100mm f/2.8

<<< -- 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.

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Credit: Images courtesy of Emanuele "ebay-camera$®" <> who operates a popular Ebay Store. All images appeared herein are Copyright © 2003. All rights reserved. A warm reminder: Please respect the visual property of the contributing photographer.

The ZUIKO lense family has two known versions introduced thus far for the ZUIKO AUTO-T 100mm f/2.8 - but difference is mainly confined to lens coating used and minor cosmetic changes but not optically. The original version debuted along with the OM system back at the early seventies has a very simple, straight forward optical construction of 5 elements in 5 groups and the optical formula has literally unaltered all these years. Those very early version may carry a silver-chrome filter rim (or popularly referred as "silver-nose") while subsequent followed up version has it all in plain matte-black finish. Some of these early lenses may not have been multi-layers coated where some seasoned OM users think those with the lense designation "E-Zuiko" may or may not have been multicoated. Another general way for such identification is whether the lense have an indicative "MC" word added to the lens data to distinguish both groups. Well, as there is no conclusive ways for easy identification provided thus far, some users even use the reflectance of colour on the front lense element help to identify the difference of versions. Generally, as most ZUIKO lenses produced after 1982 may have "MC" imprinted along with other essential data which by far is the most accurate way of guessing. Anyway,
I am not an OM expert and if it matters a lot to you, a good way is to make of of other online resources help for such identification.

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<<< -- Credit: Image at far left courtesy of Mr Rick Oleson® <> who also co-maintains the popular OM Message Board in PIM site. Image Copyright © 2003. All rights reserved.

<<<--- Credit: Images courtesy of Mr. Robert <>, Image Copyright © 2003. All rights reserved. Robert also operating a EBAY store under a codename "Clicklovely®@ Ebay"

As compared to the more glamour Zuiko equivalent of Zuiko AUTO-T 100mm f/2.0 ED, this compact zuiko lense is a more popular optic because it has a more realistic, affordable entry price than the earliar mentioned high speed Zuiko. Although this zuiko telephoto comes with a f-stop slower in its maximum lense speed, but I would rather think it offers a better value. This highly portable telephoto combines many excellent features such as compactness and lightweight with a top class image quality it delivers - Image rendition is uniformly excellent at all subject distances and aberrations are well kept under minimal level for superb image quality across its entire focusing range.

Measures at merely 48mm in length, balancing and handling for this lense with any OM bodies attached onto it is make it such a joy to use. The frame-filling 24° angle of view provides pleasing perspective where subjects are small and have a lot of details. The 100mm focal length is also a good snapshot lense because it allows the photographer to keep a comfortable distance between himself and the subject in order to retain the natural facial expression while the f/2.8 maximum aperture, other than providing a for variable creative depth of field control and should provide a good shooting experience for those who always believe investing into a slow speed zoom lenses all these while. With a compatibleTele-converter such as 2X-A , this lense may be able to extend as a 200mm f/5.6 lense.

moon Bob Gries.
Overall, the 100mm is a good focal length provides virtually endless versatility in photographic applications such as multitude of subjects - sports, scenic, nature, people and photojournalism. This high performance Zuiko AUTO-T 100mm f/2.8 offers photographers an excellent alternative to the fanciful but features-rich f/2.0 Zuiko equivalent if cost is a primary factor for consideration.

Moon rise..

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


Current version:
Zuiko AUTO-T 100mm f/2.8
Older version: E-Zuiko AUTO-T 100mm f/2.8
Focal length
: 100mm
Maximum Aperture: f/2.8
Angle of View: 24

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Optical Construction: 5 elements in 5 groups
Diaphragm operation: Automatic
Aperture range: f/2.8 ~ f/22
Minimum focus: 1m (3' 3-5/8")
Minimum photographic range: 19cm x 29cm (7.5" x 11.4")

Focusing: Straight Helicoid

Weight: 235g (8.3 oz.); older version: 230g (8.1 oz.)
Length: 48mm (1.9")
Maximum Diameter: 60mm (2.4")
Lens hood: 49mm screw-in type
Filter attachment size/Filters: 49mm screw-in
Compatible Tele-Converter:

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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..

<<< -- Credit: Images of the lens hood and case courtesy of Mr "Bob Whitmire" <>® Image Copyright © 2003. All rights reserved.

| Previous | 2/2 Zuiko AUTO-T 100mm f/2.0 ED
| NEXT | ZUIKO lenses at 135mm focal length

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 |

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About this photographic site.

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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.