Additional Information on Zuiko Lenses
MF Zuiko Wideangle Zoom Lense 28-48mm f/4.0

File Size: 41k HTML File Loading ....

2848yuhai.jpg (33k) Loading .....
S-Zuiko AUTO-Zoom 28-48mm f/4.0

The first (and only) wideangle zoom lense produced by Olympus and it was among a series of other OM Auto zoom lenses (Zuiko AUTO-Zoom 100-200mm f/5.0, 85-250mm f/5.0, 35-70mm f/4.0 and 35-70mm f/3.6.) introduced between the period of 1981/1983 for the OM system.

<<< --- Credit: This image was specially taken by Mr. Jone Quinn <> for this OM project. Jone Quinn runs a popular Ebay Store and he specializes in selling OM photo gears. Image copyright © 2003 All rights reserved.

This lense was almost a replica of the Nikon wideangle-zoom 28-45mm f/4.5 AUTO-Nikkor introduced in 1975 but with a slightly variation in a different focal length and maximum lense speed. Although its basic lense specification may sound very normal to you if measures by today standard but it was a big event for OM photographers during those days as finally, there is a true OM quality reflects at this wideangle zoom as prior to availability of this lense, the ZUIKO lens group has only a Zuiko AUTO-Zoom 75-150mm f/4.0 offered to photographers. Although this Zuiko Auto-Zoom lense has an approx. 2X zoom ratio, but it has a very practical its zoom coverage ranging from 75° wideangle to 49° normal, this lense fulfills a long-waiting desire among OM photographers for a effective wideangle zoom lense that combines frequently-used focal lengths in the wideangle-to-normal range which offers infinite versatility in many photographic applications such as interior, landscape, travel, candid, portraiture, candids of people, weddings, portraits in the studio or on location, and lastly, zoom blurs effects. One interesting feature relating to this Zuiko wideangle zoom is, it has a "S" inscription on the lense data where some OM users interpreting it as one of the "economic" series* of Zuiko lenses that were produced to counter competitions while on the other hand, be more affordable for OM users. I am not sure what are the "shortcuts" it has built-into the lense construction to lead users categorized these lenses but since I am not an expert on OM system, I will leave it as general beliefs thought it was.

* Other Zuiko zooms that carry with similar designation are S-Zuiko AUTO zoom 35-70mm f/4.0, S-Zuiko AUTO zoom 35-70mm f/3.5 ~ f/4.5, S-Zuiko AUTO zoom 70-210mm f/4.5~f/5.6 and S-Zuiko AUTO zoom 100-200mm f/5.0.

newport.jpg (63k) Loading ...
Field off Newport Road

<<< -- 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.

This retrofocus Zuiko has a very raw OM zoom design which inherited from the earlier Zuiko tele-zoom in a three rings design. The front focusing ring uses standard OM Zuiko slip-free grip with the center zoom ring in a broad ridged rubberized grip and the aperture ring at the rear positioned at section. It may takes a little orientation as the aperture ring of Zuiko zoom are located at an uncustomary position closer to the shutter speed ring near the lens mount. The lense uses separate dual rings design as opposed to mainstream single push/pull design (but these designs have respective strength and weaknesses). The two rings provide a separate zoom and focusing rings for independent control and although it is less responsive in lens handling but it does offers a more rigid design.

2848mm1.jpg (28k) Loading ...
An amazing feat on technical accomplishment for this highly portable Zuiko wideangle Zoom is, despite it has a rather complex optical system within, the lense only weighs 300g - lightweight to be easy carry around for general assignments. Besides, the lense is still compact enough to accept OM standard 49mm filters. With an aperture of f/4.0 which is relatively slow but still, it also ranks among the fastest in its class. This shows how difficult it was to design a high quality wideangle zoom lenses during those days.

<<< -- Credit: Image courtesy of Mr Alan House® <> who also operates a popular Ebay Store as well as his own photo site. Image Copyright © 2003. All rights reserved. Image has been retouch and scaled slightly for broadcasting use in this website. Please respect the visual property of the contributing photographer.

Generally, distortion and aberration are common issues when integrating retrofocus design with a zoom mechanism, to fulfill real objective of designing a wideangle zoom which capable of delivering excellent performance throughout its entire focal length while maintaining compactness and lightweight involves many technical difficulties. Olympus optical designers provided a solution with an ingenious optical formula of 8 elements in 8 groups design to ensure it meets all those optical objectives such as in controlling various common optical distortion to absolute minimal level while still able to deliver a top notch optical quality. The early version has not mentioned whether the lense was multicoated but most OM followers would believe it was and versions that shipped after 1984 carried with a more clearer definition of a "MC" indication in its lens data for verification. Whatever it is, this MF Zuiko wideangle zoom lense serves well in its basic objective and practical usage in providing OM photographers with a good zoom range that spans an all important focal length range from 28mm wideangle up to the focal length near standard lenses. It is a sad state to notice Olympus can only offer a single wideangle zoom lense in the Zuiko lens system, as most would firmly believe they have the resources, capacity and technical capabilities to provide more available options for OM photographers worldwide.

Technical Specification for S-Zuiko AUTO-Zoom 28-48mm f/4.0

Lense type:
two-touch wideangle-zoom design
Focal length: 28-48mm
Maximum aperture: 1:4.0
Lens construction:
8 elements in 8 groups

Picture angle: 75° (f=28mm) - 49°(f=48mm)
Automatic, full aperture metering
Aperture scale: f/4.0~ f/22

2848yuhaiA.jpg (30k) Loading ...
Distance scale: Graduated in meters and feet from 0.65m (2.3 ft) to infinity (oo)
Rotating Helicoid system, by turning the focusing ring
Zooming: By rotating movement via the zooming ring locating at the center
Filter attachment size / Filter(s): 49mm, Screw-in type
Lens hood:
55mm Screw-in type
Minimum Photographic range: 74cm x 49cm@28mm; 46cm x 31cm@48mm
Length: 54mm
Maximum diameter: 65mm
300g (10.6 oz)

<<< --- Credit: Image courtesy of Mr. Jone Quinn <>. Jone Quinn runs a popular Ebay Store and he specializes in selling OM photo gears. Image copyright © 2003 All rights reserved.

Recommended Focusing Screens: 1-1*, 1-2*, 1-3*, 1-4*, 1-5#. 1-9*. 1-10*, 1-13* and 1-14*. * Compatible. #Can be used. They will provide for accurate and easy focusing but meter built into the OM-1 and OM-2 (on MANUAL) will not indicate correct light readings. With the OM-2 on AUTO, correct exposures are made on the film, but the meter needle does not give correct light readings.

2848mmhood.jpg 2848mmf4optic.jpg
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 |

<<< -- Credit: Image of this lens hood courtesy of Mr Alan House® <>. Image Copyright © 2003. All rights reserved.

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

| 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.