Olympus Zuiko AF Zoom 35-70 mm f/ 4 Lens

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Olympus Zuiko AF Zoom 35-70 mm f/ 4 lens

Optical design

Format: 35mm SLR

Type: Zoom lens

Focusing: Auto Focus (AF)

Lens mounts: Olympus OM

First year of production: 1983

Optical design: 9 elements in 8 groups

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Specifications:

Focal length	Max. aperture	Min. aperture	Blades	Min. Focus (m.)	Filter Ø (mm.)	Weight (gr/oz)	Length (mm/in)
35mm - 70mm	f/4.0	f/22	6	0.75	55	550/19,4	77/3

Additional information:

The Olympus Zuiko AF Zoom 35-70 mm f/ 4 is a lens with a built-in automatic focusing. The Zuiko AF Zoom was designed for the Olympus OM camera and it was issued together with the OM-30 camera, which was sold under the trademark Olympus OM-F.

As different from competitors, focusing detector of the Zuiko AF Zoom was phase, the image came to it through a beam-splitting prism It is not only made focusing more accurate, but also it enabled a photographer to be sure that the Olympus Zuiko AF Zoom 35-70 mm f/ 4 focuses at the chosen subject.

Indeed, additional prism did not make image quality better, but the possibility of 'real' (including AF tracking) autofocusing on a non-autofocus camera was worth the effort.

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Catalog of parts and electronic circuit (views: 144)

Posted by: nukemall Date of publication: 06.03.2011

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