OLYMPUS S ZUIKO One-touch Zoom 100 - 200mm f/5;
Test date not given - before mid 1985.


Lens number 104140                  

Specifications: 100-200mm f/5 S Zuiko; mount for Olympus bayonet; No. 104140; accepts 49mm filters; f/5 to f/32, full-stop detents; min. foc. dist. 8 ft. (2.4m), 5¼ in. long, 2 3/8 in. diam. (147 x 60mm); 1 lb 4 oz. (567.6g); $235.00.

Practical comments: Relative light weight, push-pull zoom balances well on Olympus bodies despite its length. Zoom and focus are controlled by a broad 2 3/8 in. diamond knurled rubber collar. Zooms out to 200mm with a velvety x 1¼ in. stroke. At closest focussing distance, with collapsible hood extended is close to 9 in. long, but is easy handling because of its slim light weight body. All numerals are large and easily legible. Zoom range is calibrated in green at 100, 120, 150 and 200 mm; footage scales in orange and metric scales in white. Apertures are set by a narrow ¼ in. ring next to the bayonet mount. Depth of field preview button is on the mount at 9 o'clock in conventional Olympus styling. Instrument black finish..

PERFORMANCE
Our Standard
as Tested
Focal length: ±5%
(95.00-105.00mm)
(190.00-210.00mm)
104.66mm
194.36mm
Aperture: ±5%
100mm (f/4.75 - 5.25)
at 200mm: (f/4.75 - 5.75)
f/5.24
f/5.25
Distortion:
100mm: (±2.0%)
200mm: (±2.5%)
1 - 13% (barrel)
less than 10% (pincushion)
Light falloff: at f/8
+1 stop from theoretical limit
100mm: (0-1.1 stops)
200mm: (0-1.0 stops)

0.1 stops
0.4 stops


RESOLUTION
ZUIKO 100-200mm f/5
at 100mm
at 1:49.1
f/ Centre (l/mm) Corner (l/mm)
5 Excellent 55 Excellent 55
8 Excellent 62 Excellent 55
11 V. Good 55 Excellent 55
16 Good 49 Excellent 44
22 Accept 44 Excellent 44
32 Accept 35 Excellent 35
RESOLUTION
ZUIKO 100-200mm f/5
at 150mm
at 1:49.01
f/ Centre (l/mm) Corner (l/mm)
5 Excellent 55 Excellent 44
8 Excellent 62 Excellent 49
11 Excellent 49 Excellent 55
16 V. Good 4? Excellent 44
22 V. Good 44 Excellent 44
32 Excellent 39 Excellent 39
RESOLUTION
ZUIKO 100-200mm f/5
at 200mm
at 1:50
f/ Centre (l/mm) Corner (l/mm)
5 Excellent 56 Excellent 50
8 Excellent 50 Excellent 50
11 Excellent 50 Excellent 50
16 Excellent 45 Excellent 45
22 Excellent 45 Excellent 45
32 Excellent 40 Excellent 40

CONTRAST
ZUIKO 100-200mm f/5
at 100mm
at 30 lines/mm
f/ Centre (%) Corner (%)
5 High 53 High 32
8 High 62 High 52
11 High 63 High 50
16 High 54 High 42
22 High 48 HIgh 38
32 High 44 High 36
CONTRAST
ZUIKO 100-200mm f/5
at 150mm
at 30 lines/mm
f/ Centre (%) Corner (%)
5 High 52 Medium 24
8 High 57 High 34
11 High 60 High 42
16 High 54 High 44
22 High 50 High 36
32 High 46 High 33
CONTRAST
ZUIKO 100-200mm f/5
at 200mm
at 30 lines/mm
f/ Centre (%) Corner (%)
5 High 68 Medium 22
8 High 73 Medium 24
11 High 78 Medium 32
16 High 70 Medium 34
22 High 69 Medium 35
32 High 48 High 36


Field test slides: Our Kodachrome 64 transparancies were sharp and crisp - fine detail rendering was noted even at f/5, wide-open. Performance was above average for a zoom of this range. Flare control was average for a multi-element zoom.

Optical bench analysis (for optical experts): At 100mm, on axis - very slight flare, performance near diffraction limits by f/11. Off-axis, very slight astigmatism, gone by f/11, very slight lateral color. At 150mm, on axis, very slight flare, disappearing by f/8.

Modern Photo Buying Guide/85
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