The 90mm f/2 Macro Zuiko is a member of the second series of OM lenses, which were designed with an emphasis on large maximum aperture and high performance, without the concern for small size that characterised the first series, including the 50mm f/3.5 Macro Zuiko. This was the first macro lens in the 90–105 mm range from any manufacturer to feature an f/2 maximum aperture, a feature that helps to keep the viewfinder bright even at full extension. The lens was designed for optimum performance at a magnification of ×0.1, and the floating elements minimise the aberrations that would normally be expected at higher and lower magnifications.
The lens can focus from infinity to ½ life size. With the addition of a full set (7 + 14 + 25 mm) of Auto Extension Tubes, the focusing range can be altered to cover ½ life size to life size (1:1). Unlike the 50mm macro lenses, the front element is not recessed, and so a separate rubber lens hood was available.
The non-macro Zuiko lenses have 2 focusing scales, one in feet with orange markings and the other in metres with white markings. The 90mm f/2 Macro Zuiko does not follow this pattern, and has a magnification scale with yellow markings plus one focusing scale in either feet (orange) or metres (white), and so there are separate versions with metric and Imperial focusing scales.
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Magnification | ×0.5 | Subject area | 72×48 mm 2.8×1.9 in | Working distance | 240 mm |
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Magnification | ×1.00 | Subject area | 36×24 mm | Working distance | 14.0 mm |
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A clamp-on rubber lens hood was available.
The Macro Flash Shoe Ring screws into the 55 mm filter mount, and takes the heads of the T28 Macro Twin Flash 1 or the T28 Macro Single Flash 1.
The T10 Ring Flash 1 and T8 Ring Flash 2 screw into the 55 mm filter mount.
Reproduced with permission from the copyright owner, Olympus Optical Co., Ltd
ZUIKO AUTO-MACRO 90MM 1:2
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Thank you for your purchase of the ZUIKO AUTO-MACRO 90mm. This medium-range telephoto macro lens covers a wide focusing range from ½× close-ups to infinity. With its large aperture ratio of F2, it provides excellent image definition in macro photography and promises good performance at infinity for extended picture-taking possibilities. Specifications • Focal length: 90mm • Max. aperture ratio: 1:2 • Angle of view: 27° • Optical construction: 9 elements in 9 groups (multicoated) • Diaphragm operation: Automatic • F stop range: 2–22 • Minimum focus: 0.4m (15.7″) • Minimum field: 48 × 72mm (1.9″ × 2.8″) • Focusing: Straight helicoid (providing for aberration correction at close range) • Weight: 550g (19.4oz.) • Length: 71mm (2.8″) • Max. diameter: 72mm (2.8″) • Lens hood: 57mm slip-on (optional; same as for 135mm F4.5 macro lens) • Filter: 55mm screw-in. *Combined with an Auto Extension Tube or Auto Bellows, this lens permits magnifications higher than ½×. For best results, however, it is recommended to use other macro lenses designed for specific magnifications. |
Compatible focusing screens:
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Manual exposure | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
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Automatic exposure | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
Finder exposure indication | ○ | ○ | ○ | ○ | ✗ (OM2N OM1N) |
✗ (OM2N OM1N) |
○ | ○ | ○ |
Depth of Field Table (in metres)
F stop | Distance scale — Camera-to-subject distance | |||||||||
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*0.4 | *0.5 | *0.7 | *1 | *1.5 | *2 | *3 | *5 | *10 | *∞ | |
2 | 0.40 | 0.50 | 0.70 | 0.99–1.01 | 1.48–1.52 | 1.97–2.03 | 2.93–3.07 | 4.81–5.21 | 9.24–10.89 | 118.01–∞ |
2.8 | 0.40 | 0.50 | 0.70 | 0.99–1.01 | 1.48–1.52 | 1.96–2.04 | 2.91–3.10 | 4.74–5.29 | 9.00–11.25 | 86.95–∞ |
4 | 0.40 | 0.50 | 0.69–0.71 | 0.99–1.01 | 1.47–1.53 | 1.94–2.06 | 2.87–3.14 | 4.64–5.42 | 8.63–11.90 | 61.04–∞ |
5.6 | 0.40 | 0.50 | 0.69–0.71 | 0.98–1.02 | 1.46–1.54 | 1.92–2.08 | 2.82–3.20 | 4.51–5.61 | 8.18–12.87 | 43.70–∞ |
8 | 0.40 | 0.50 | 0.69–0.71 | 0.98–1.03 | 1.44–1.56 | 1.89–2.12 | 2.75–3.30 | 4.33–5.92 | 7.59–14.69 | 30.65–∞ |
11 | 0.40 | 0.50–0.51 | 0.69–0.71 | 0.97–1.04 | 1.42–1.59 | 1.85–2.17 | 2.67–3.43 | 4.12–6.36 | 6.96–17.83 | 22.23–∞ |
16 | 0.40 | 0.49–0.51 | 0.68–0.72 | 0.95–1.05 | 1.39–1.63 | 1.79–2.26 | 2.54–3.66 | 3.82–7.27 | 6.12–27.75 | 15.39–∞ |
22 | 0.40 | 0.49–0.51 | 0.67–0.73 | 0.94–1.07 | 1.35–1.69 | 1.73–2.38 | 2.41–4.00 | 3.51–8.77 | 5.35–84.10 | 11.21–∞ |
Figures with * are engraved on the distance scale.
Circle of least confusion 1/30 mm.
Depth of Field Table (in feet)
F stop | Distance scale — Camera–to–subject distance (feet) | |||||||||
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*1.3 | *1.5 | *2 | *3 | *4 | *6 | *8 | *12 | *20 | *∞ | |
2 | 1.30 | 1.50 | 1.99–2.01 | 2.98–3.02 | 3.97–4.03 | 5.92–6.08 | 7.86–8.15 | 11.67–12.35 | 19.06–21.03 | 377.07–∞ |
2.8 | 1.30 | 1.50 | 1.99–2.01 | 2.98–3.02 | 3.96–4.05 | 5.89–6.11 | 7.80–8.21 | 11.55–12.49 | 18.75–21.43 | 279.74–∞ |
4 | 1.30 | 1.50 | 1.99–2.01 | 2.97–3.03 | 3.94–4.06 | 5.85–6.16 | 7.72–8.30 | 11.37–12.71 | 18.26–22.11 | 197.54–∞ |
5.6 | 1.30 | 1.49–1.51 | 1.98–2.02 | 2.95–3.05 | 3.91–4.09 | 5.79–6.23 | 7.62–8.42 | 11.13–13.02 | 17.64–23.09 | 141.97–∞ |
8 | 1.29–1.31 | 1.49–1.51 | 1.98–2.02 | 2.94–3.07 | 3.88–4.13 | 5.70–6.33 | 7.47–8.62 | 10.80–13.51 | 16.80–24.74 | 99.87–∞ |
11 | 1.29–1.31 | 1.49–1.51 | 1.97–2.03 | 2.91–3.09 | 3.83–4.18 | 5.60–6.46 | 7.28–8.88 | 10.41–14.18 | 15.85–27.16 | 72.90–∞ |
16 | 1.29–1.31 | 1.48–1.52 | 1.95–2.05 | 2.87–3.14 | 3.76–4.27 | 5.44–6.70 | 7.00–9.35 | 9.82–15.46 | 14.49–32.46 | 50.31–∞ |
22 | 1.29–1.31 | 1.48–1.53 | 1.94–2.07 | 2.83–3.19 | 3.68–4.39 | 5.26–7.00 | 6.69–9.98 | 9.20–17.36 | 13.14–42.44 | 36.70–∞ |
Figures with * are engraved on the distance scale.
Circle of least confusion 1/760 in.
Care and Storage
Lens application range
Lens position | Subject area covered (mm) | Magnification | Distance from lens to subject (cm) | |
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Lens alone | Normal | 0 | ∞ | |
Extended | 72×48 | 0.5× | 23.5 | |
With 7mm Auto Extension Tube | Normal | 450×300 | 0.08× | 113.4 |
Extended | 62.1×41.4 | 0.58× | 20.9 | |
With 14mm Auto Extension Tube | Normal | 225×150 | 0.16× | 61.1 |
Extended | 55.4×36.9 | 0.65× | 19.1 | |
With 7mm+14mm Auto Extension Tubes | Normal | 150×100 | 0.24× | 41.7 |
Extended | 49.3×32.9 | 0.73× | 17.5 | |
With 25mm Auto Extension Tube | Normal | 128.6×85.7 | 0.28× | 36.6 |
Extended | 46.8×31.2 | 0.77× | 16.9 | |
With 25mm+7mm Auto Extension Tubes | Normal | 100×66.7 | 0.36× | 29.3 |
Extended | 42.9×28.6 | 0.84× | 15.7 | |
With 25mm+14mm Auto Extension Tubes | Normal | 81.8×54.5 | 0.44× | 25.0 |
Extended | 39.1×26.1 | 0.92× | 14.8 | |
With 25mm+14mm+7mm Auto Extension Tubes | Normal | 69.2×46.2 | 0.52× | 21.8 |
Extended | 36×24 | 1.00× | 14 | |
With 65-116mm Auto Extension Tube at 65mm | Normal | 50×33.3 | 0.72× | 17.1 |
With 65-116mm Auto Extension Tube at 116mm | Normal | 27.9×18.6 | 1.29× | 11.6 |
Extended | 20.9×14.0 | 1.72× | 10.0 | |
With Auto Bellows at 68mm | Normal | 92.3×61.5 | 0.39× | 27.5 |
With Auto Bellows at 122.5mm | Normal | 36×24 | 1.0× | 13.6 |
With Auto Bellows at 173.5mm | Reversed | 36×24 | 1.0× | 12.5 |
With Auto Bellows at 231mm | Reversed | 22.0×14.6 | 1.64× | 13.6 |
Optimum lens application range | |
Possible |
OLYMPUS
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Created 18th May 2001 — Updated 28th February 2021
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