Zoom Rokkor 1:5.6 f=100-200mm


The 100-200mm zoom is known in one version yet:

The first version is the only zoom, that was avalaible from the early Rokkor version to the latest MD version. Together with the 50mm macro, it covers the full period of time of the manual Minolta system.

The lens shows the very early two ring system, with a non-linear aperture control. The clicks on the preset ring show decreasing distance, the more aperture is closed, due to the non-linear mechanical character of the aperture mechanism.

A nice detail, the window to the selected zoom position, will be found some again - some decades later with the last MD version. The coating of this early lens is amazingly sophisticated, featuring multi-complementary chromatic reflection. This lens is even better coated than the later MC or MD-Rokkor version.

This lens is a collectors item yet and not so easy to find.

Zoom Rokkor 1:5.6 f=100-200mm Version 1
Focal length: 100 - 200mm variable
Aperture range: 1 : 5.6 - 22
Aperture type: One ring, 10 blades,
glossy steel electro-oxidised
Optical design: 8 elements / 5 groups
Detailed optical design, front to mount: 6 elements / 4 groups
- aperture -
2 elements / 3 group
Close-up distance: 2.4m at 100mm zoom position
2.4m at 200mm zoom position
Filter size / -mount type: 55mm screw-in, rotating
Shade type: Screw-in type
Length from mount plane, focus at infinity / close-up: 175mm / 196mm at 100mm zoom position
211mm / 231mm at 200mm zoom position
Diameter: 61mm
Weight: 622g
Lens coating: Simple, multi-coloured-complementary, 1 green layer.
DOF type: Manual pre-set ring
Supported aperture functions: Stopdown metering: Yes
Automatic diaphragm: No
Meter-coupled TTL: No
Aperture read-in: No
Supported camera modes: M, manual: Yes.
A mode: Yes.
S mode: No.
Program mode: No.
Front view:

Silver polished front and very sophisticated lens coating.
Overview:

Leather covered tube, very unusual for a Rokkor type.
Rear view:

Silver mount without aperture lever.
Detail 1:

Very nice detail: window for selected zoom position. Found again 20 years later with he MD-version.