Additional Information on Zuiko Lenses
MF Zuiko tele-zoom lense 50-250mm f/5.0

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Zuiko AUTO-Zoom 50-250mm f/5.0 MACRO

Purely based on specification, this lense is seemed like an update for the Zuiko AUTO zoom 85-250mm f/5.0. However, it has a different form, dimension, optical design and even may present an entirely different lense handling experience during operation - primary because it has an one-touch zoom design where the other one uses a dual rings design for independent zoom/focusing control.

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<<< --- Credit: Some of these very nice images presented here 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. Please respect the visual property of the contributing photographer.
It is hard to conclude which lense/design is better as it is purely a matter of personal preference. However, one touch zoom does has its strength as it is more responsive to fast changing action with its ability to control zoom and focusing action simultaneously; besides, it can be designed more compact with lesser helical/revolving components within and be able to accommodate a wider zoom range within a single lense. As in this case, for an example, this lense measures at a length of 140mm while the 85-250mm counterpart has a length of 196mm despite the latter has a smaller zoom ratio. Further, this design also trims its overall weight down to just 760g (31.9 oz) as compared to 905g (31.9 oz) found on the previous two touch zoom.

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With an powerful zoom ratio of 5X and probably it is the widest ratio of such lens-type you can find within the Zuiko lense system. The versatility factor alone offers by this remarkable Zuiko zoom lense somehow provides a better justification to see this lense commands a better premium than the predecessor in the used market. (A mint condition unit may fetch around USD485.00-USD550.00* *Source: MacBroom's Camera Blue Book.).

<<< -- Credit: Image courtesy of Mr MCLau®. Image Copyright © 2003. All rights reserved. Please respect the visual property of the contributing photographer.

Well, to be honest, by simply summarizing this lense shine in zoom range and overall compactness does little justice to all those optical engineers at Olympus. Firstly, this lense was Olympus answer to prevailing zoom lense technology at the time where one touch zoom was beginning to take shape as the mainstream design. One of the less pronouncing feature was its close focus ability. This zoom can close focus to about 1.8m (5.9 ft) but as many other popular zoom that surfaced during that period, it also incorporates an ingenious MACRO mode where when the lens is set at 250mm, it can actually surpass its minimum focusing distance to a shorter distance at 1.53m, at this distance, an amazing feat in the design of this lense is, a maximum reproduction ratio of 1:5 is reached ! Although the lense literature never indicates whether a close range optical correction system was incorporated but still, its macrofocus feature has expanded its working ability and enhances its value further as an true macro-tele-zoom. Further, a built-in retractable lens hood is provided for easy usage, quite an unusual feature for this lense type. Well, I am not sure when was the Zuiko AUTO zoom 85-250mm f/5.0 being substituted officially by this version (perhaps, it never been on such ground but simply based on normal discontinuation process due to lesser demand with introduction of this one-touch Zuiko zoom) but based on an OM system brouchure published in 1992, the Zuiko lense chart section has only this lense remained in the lineup. Note: Olympus warns the depth of field scales and infrared index canot be used as reference once you are in macrofocus mode.

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The lense is able to stop down to a minimum aperture of f/32 which is effectively useful in many situations, in particular when operating at its Macro setting for extended depth of field control. Further, one touch zoom offers a better visual reference in relation to depth of field scales and this lense has three settings, f/22, f/11 and f/5.0 along with an red-coloured infrared index. (hidden in this picture.

<<< --- Credit: Image courtesy of Mr. Jone Quinn <>. Image copyright © 2003. All rights reserved.

Technical Specification for Zuiko AUTO-Zoom 50-250mm f/5.0 MACRO

Lense Type:
One touch tele-zoom design
Focal length: 50-250mm
Maximum aperture: 1:5.0
Lens construction: 13 elements in 10 groups
Picture angle: 47° (f=50mm) - 10°(f=250mm)
Automatic, full aperture metering
Aperture scale: f/5.0~ f/32

Distance scale: Graduated in meters and feet from 1.8m (5.9 ft) to infinity (oo)
Focusing: Rotating helicoid system, by turning the focusing ring
Zooming: push and pull control via the zooming/focusing ring
Filter attachment size / Filter(s): 55mm, Screw-in type

Lens hood: Built-in retractable type
Minimum photographic range: 103cm x 69cm@50mm; 22cm x 14cm@250mm
Maximum reproduction ratio: 1:5 @ its closest focusing distance at 1.53m at 250mm setting
Note: Olympus warns the depth of field scales and infrared index canot be used as reference once you are in macrofocus mode.
Usable Teleconverter(s):
Length: 140mm
Maximum diameter: 72mm
760g (31.9 oz)
Recommended Focusing Screens: 2-4**, 2-13**,1-1*, 1-2*, 1-3*, 1-4N**, 1-5#, 1-6#, 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.** Compatible, only with applicable OM bodies introduced at later stage.

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 |

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

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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.