Additional Information on Zuiko Lenses
MF Zuiko wide-tele-zoom 35-70mm lenses - Part 3

 
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S-Zuiko AUTO-Zoom 35-70mm f/3.5~f/4.5

This S-Zuiko vario wide-tele zoom was believed to have been introduced between the period of 1984/1985. Although it never been intended to replaced the S-Zuiko AUTO zoom 35-70mm f/4.0 during its days as for quite a while both lenses did co-exist side by side. However, by late '80 while the constant aperture f/4.0 counterpart seemed hard to follow with the trend and this lense was remained along with another Zuiko original, Zuiko AUTO zoom 35-70mm f/3.6 in a 1992 publication of the OM system brochure Well, mid between all these events and happening, the AF auto zoom 35-70mm f/4.0 also slowly finding its way out exit from the Zuiko lens group.

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The S-Zuiko AUTO-Zoom 35-70mm f/3.5~f/4.5 was probably the first Zuiko zoom that carries a variable aperture design. Such designing concept for zoom lense was beginning to get popular during those days as a way to produce zoom lenses with a designing objectives compromise between price, performance, lightweight and compactness. Since then, the basic theory has remained very popular, even today. Come to think of it, this Zuiko zoom has apparently patched some of the weaknesses found in the earlier f/4.0 while improving some areas, such as the close focus section. Olympus has incorporated an ingenious macro focus design into this lense and has enabled the lense can close focus down to a minimum distance of merely 0.45m. The close-focus design is not just confined to a single setting but rather enables the lense to use this across its entire zoom range. (Olympus didn't mentioned the reproduction ratio in its user's manual but the highest magnification yields is 14.5cm x ~21.7cm (5,7" x 8.5") at the 70mm setting).
<<< -- Credit: Image courtesy of Mr BOB Gries®<gries@nothingrhymeswithorange.com> . Bob has a website on his own. Image Copyright © 2003. All rights reserved. Please respect the visual property of the contributing photographer.

Take a look at the chart below, you will notice this S-Zuiko does score highly in various departments as compared to other Zuiko with equivalent zoom range (35-70mm).

lense

Optical constructions

design

min. aperture

min. focusing distance

macrofocus

Filter size

max. diameter

length

Weight

Indicative price

Zuiko 35-70mm f/3.6 10 elements in 8 groups two-touch f22 0.8m NO 55mm 67mm 74mm 400g USD240.00 - USD320.00
S-Zuiko 35-70mm f/4.0 7 elements in 7 groups two-touch f22 0.75m NO 55mm 68mm 71mm 380g USD125.00 - USD160.00
Zuiko AF 35-70mm f/4.0 9 elements in 8 groups AF / Manual f22 0.75m NO 55mm 92mm 70mm 550g USD120.00 - USD160.00
S-Zuiko 35-70mm f/3.5~f/4.5 9 elements in 8 groups two-touch f22 0.75m (0.45m) YES 49mm 62mm 51mm 190g USD100.00 - USD160.00
S-Zuiko 35-70mm f/3.5~f/4.8 7 elements in 7 groups two-touch f22 0.40m NO 52mm 63mm 65mm 185g USD80.00 new

The variable opening aperture design may be a little confusing to OM photographer who may used to standard fixed aperture type in many other Zuiko lenses. Basically, when the lense is set at its widest wideangle 35mm setting, the maximum lense diaphragm opening is f/3.5 which aims to provide maximum image brightness inside the viewfinder for the convenience in viewing/focusing/composing. As you zoom, the maximum aperture will slowly stop down to a smaller f/4.5 at its longest telephoto end. In operation there are some areas that needs a little attention especially when newer OM bodes with other metering options such as spot meter. if you are 2ooming on spot metering on OM bodies such as OM-4,OM-3, OM2SP etc. or when a memory lock is activated. Always set the aperture ring at f/4.5 (white index dot) or a smaller aperture (larger aperture) as the open aperture metering is done at f/4.5 for correct exposure on zooming. To many seasoned photographers, a zoom with variable apertures design can be either a hate or love relationship.

Another area that you need to master well is its close-focusing design which varies from one touch zoom design such as those find in lenses such as S.Zuiko AUTO zoom 50-250mm f/5.0. If you intend to take close-ups beyond the normal minimum focusing distance of the lense, use its close-locus mechanism. To focus, turn the focusing ring beyond the "0.75m" mark (its closest minimum distance) and set it anywhere between "75" and "CLOSE FOCUS" that printed on the barrel. If you want to shoot at your desired image magnification, move the camera back and forth until the subject is clearly focused. This means during macrofocus, the helical focus will not help and you need to adjust focus by moving yourself to suit the shooting distance. The design may not be highly desirable but still offers the photographer with an easy route to get higher magnification on location. Besides, its highest achievable reproduction is set at its longest focal length at 70mm which should provide images with a more natural rendition in perspective.

Optically, the lense uses a 9 elements in 8 groups design, multicoated for maximum transmission of light and renders faithful colour reproduction. Measuring only 51mm in length and 190g in overall weight, making this one of the more desirable 35-70mm to carry around with for traveling and shooting on location. Olympus also warns in the instruction manual that the dedicated lense hood designed for this lense uses a slide-on type, in common with that for a 50mrn f/1.8 Zuiko standard lense, Fit on the lense hood as far as it will go. If It is fitted midway, vignetting may occur. This compact Zuiko zoom is the only 35-70mm zoom that uses a 49mm thread filter size. In fact, the subsequent Zuiko zoom lense with an identical 35-70mm zoom range, S-Zuiko AUTO zoom 35-70mm f/3.5~f/4.8 that supplied along with the OM2000 uses another different filter thread of 52mm (see below).

35-70mm f/3.6 | 35-70mm f/4.0 | 35-70mm f/3.5~f/4.5 | 35-70mm f/3.5~f/4.8 | AF 35-70mm f/4.0 |

Technical Specification for Zuiko AUTO-Zoom 35-70mm f/3.5~f/4.5 MACRO

Lense Type:
Two-touch wide-tele-zoom design
Focal length: 35-70mm
Maximum aperture: 1:3.5~4.5
Lens construction: 9 elements in 8 groups, Multicoated
Picture angle: 63° (f=35mm) - 34°(f=70mm)
Diaphragm:
Automatic, full aperture metering
Aperture scales: f/3.5~ f/22

3570mmf3545optic.gif
Distance scale: Graduated in meters and feet from 0.75m (2.5 ft) to infinity (oo) with close focus capability (see below)
Focusing: Rotating helicoid focusing system, by turning the focusing ring
Zooming: via separate zooming ring
Filter attachment size / Filter(s): 49mm, Screw-in type

Lense hood: slide-on type type****
Minimum photographic range:
47cm x 70 cm (18-5" x 27.6" @ = 35 mm ~ 25 x 38 cm (9.8" X 15.0")@70 mm; at close focus: 14.5cm x ~21.7cm (5,7" x 8.5 ") (f =70mm)
Maximum reproduction ratio: ?@ its closest focusing distance at 0.45m (1.5 ft)
Length:
51mm (2.0")
Maximum diameter: 62mm (2.4")
Weight:
190g (6.7 oz.)
Recommended Focusing Screens: 2-4**, 2-13**,1-1*, 1-2*, 1-3*, 1-4N**, 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****Fit on the lense hood as far as it will go. If It is fitted midway, vignetting may occur.

S-Zuiko AUTO-Zoom 35-70mm f/3.5~f/4.8

In 1997, Olympus introduced an entry level OM2000 SLR camera. The camera was sold by bundling with a new 35-70mm Zuiko auto zoom lense as a standard sales configuration. Although both camera/lense were more intended to use to serve beginners to the OM SLR system but it has also raised some controversial arguments and constantly disputed by many OM users in relation in their originality. Whatever it is, I do think Olympus did made an attempt to ensure the OM2000 will take on the best in the industry to compete with other entry level SLR model (as a matter of neutral evaluation, it is and they have just done that - the OM 2000 ranks high in its technical spec as well as handling). However, other than its modest price it offers - there are some issues that relating to this little Zuiko zoom that has caused many OM faithfuls to echo out their dissatisfaction- in particularly with its overall built quality. In fact, this extra-lightweight zoom carries many similarities with other entry level MF zoom such as the Nikon 35-70mm f/3.5~f/4.5 (8 elements in 7 groups) and the zoom lense that used to bundle with the Canon T-60. Although the lense was originally meant to be a standard zoom solely for the OM2000, but it was also being sold separately by Olympus. It comes with a suggested list price of only USD80-00- almost at a fraction of the cost of comparing 35-70mm f/3.6 Zuiko - making it one of the cheapest Zuiko lense around in the Zuiko lense group.

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<<<---- The Petronas Twin Towers, Kuala Lumpur, Malaysia - the current world's tallest man-made structure which locates just next to my office is a constant good photographic topic for me during my light jogging at the central park. From my copyright-Free images collection leofoo®

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Anyway, this S-Zuiko is also the lightest 35-70mm version among all the available Zuiko zooms at this specific zoom range and optically, it has a different optical construction in its 7 elements in 7 groups design from the 9 elements in 8 groups that used in the f/3.5~f/4.5 version. The lightweight factor alone may sound quite appeal to some but I found majority of OM users are quite defensive with the debut of this little S-Zuiko zoom - primarily because of a pre-mind-set thinking it is not entirely an 'original' OM product.

<<< -- Credit: Image courtesy of Mr Jerry "cameras plus"® <camerasplus@earthlink.net> Image Copyright © 2003. All rights reserved. Please respect the visual property of the contributing photographer.

Whatever it is, personally, I do feel a little negative in relation to its weight factor where I feel the lense lacks the kind of quality feel generally presents in a typical Zuiko lense. Well, it is more of a personal thought but no doubt, a fact remains, this standard zoom is quite cheap as compared to other equivalent Zuiko and probably it is a sole reason give rise to its popularity among many new OM SLR users. Overall, this lense may not be the best what Olympus can offer but neither its asking price can make anyone complaint about - so, if you think it doesn't serve you right, since they are four other versions, just go for other options. Technically, this Zuiko zoom can perform the best in its ability to close focus down to merely 0.4m - the best performer thus far in this class and since it comes with a different filter attachment size of 52mm - not entirely an OM filter thread-standard but fortunately, 52mm filters can be readily available everywhere but the only concern is, you may have to invest/carry another set of filter accessories if your system grows in the future.

Specification for Zuiko AUTO-Zoom 35-70mm f/3.5~f/4.8

Lense Type:
Two-touch wide-tele-zoom design
Focal length: 35-70mm
Maximum aperture: 1:3.5~4.8
Lens construction: 7 elements in 7 groups, Multicoated
Picture angle: 63° (f=35mm) - 34°(f=70mm)
Diaphragm:
Automatic, full aperture metering
Aperture scales: f/3.5~ f/22 (35mm); f/4.8 - f//32 (70mm)

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Distance scale: Graduated in meters and feet from 0.4m (2.5 ft) to infinity (oo) with close focus capability (see below)
Focusing: Straight helicoid focusing system, by turning the focusing ring
Zooming: via separate zooming ring
Filter attachment size / Filter(s): 52mm, Screw-in type

<<< -- Credit: Image courtesy of Mr Jerry "cameras plus"® <camerasplus@earthlink.net> Image Copyright © 2003. All rights reserved. Please respect the visual property of the contributing photographer.

Lense hood: 52mm screw-in type
Minimum photographic range:
unavailable
Length:
65mm
Maximum diameter: 63mm
Weight:
185g
Recommended Focusing Screens: 2-4**, 2-13**,1-1*, 1-2*, 1-3*, 1-4N**, 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.

| previous | 3/3 | NEXT | An AF 35-70mm Zuiko zoom for all OM bodies...

35-70mm f/3.6 | 35-70mm f/4.0 | 35-70mm f/3.5~f/4.5 | 35-70mm f/3.5~f/4.8 | AF 35-70mm f/4.0 |

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

| Back | Index Page of OM Zuiko lenses
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Maintainers for OM Zuiko Site & Message Board: Rick Oleson (Email: rick_oleson@yahoo.com Website: http://rick_oleson.tripod.com), Bruce Hamm (bhamm@magma.ca), John Orrell (john@orrellj.freeserve.co.uk), Simon Evans, (http://www.mawddwy.freeserve.co.uk); Shaun (shaun@noemail.com), Andy Radcliffe (AndyJRadcliffe@manx.net)

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 <md@dementia.org>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.