55/3.5  KONICA Macro HEXANON AR

Specifications:

Field of view

Elements / groups 

Aperture system

Aperture Scale

Metering

Closest focusing distance

Filters

Hood

Length

Diameter

Weight (~)

Years of production

Number of versions

Rarity

43º

4/3

Automatic

3.5 to 22 + AE

At full aperture

0.25mm (0.22mm with adapter)

Screw-in, 55mm

Recessed front element

60mm

64mm

290g (390g with adapter)

1970-87

3

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Optical diagram: 

Comments:                                                                                                                                                                                                                                 ●

105/4.0  KONICA Macro HEXANON AR

Specifications:

Field of view

Elements / groups 

Aperture system

Aperture Scale

Metering

Closest focusing distance

Filters

Hood

Length

Diameter

Weight (~)

Years of production

Number of versions

Rarity

23º

5/3

Automatic

4 to 22 + AE

At full aperture

 With bellows or Helicoid

Screw-in, 55mm

Screw-in, 55mm

48mm

63mm

230

1971-87

2

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Optical diagram:

Comments:                                                                                                                                                                     ●

The Hexanon 105mm is a unique lens in the Hexanon lineup, because it has no focusing mechanism. It is intended to be used with a bellows. In the absence of a bellows, this lens can also be used on the special Auto Helicoid – basically an adjustable extension ring without optical elements but with a focusing ring. With its aid, the Hexanon 105mm can be focused from 60cm to infinity. The great distance form the film plane at which the Hexanon 105mm is meant to be used required a special optical formula thanks to which that lens produces very sharp, contrasty flat-field images.

 KONICA AUTO HELICOID AR

Specifications:

Length

Diameter

Weight (~)

Years of production

Number of versions

Rarity

1973-76

1

Optical diagram:

Comments:                                                                                                                                                                     ●

The Auto Helicoid is little more than an extension ring whose length can be adjusted by means of a focusing ring. It contains no optical elements and it is meant to be used above all with the Hexanon 105, a macro lens devoid of focusing mechanism. But it can also be used with various other lenses in close and very close-range photography. The length of the Auto Helicoid varies from 46mm to 71mm. The extensible portion of the helicoid’s barrel carries magnification scales for the various lenses that may be used on it. The attainable magnification ratios are: - 1.34 to 1.9 with a 35mm lens; 0.94 to 1.3 with a 50mm lens; 0.85 to 1.25 with a 55mm lens; 0.82 to 1.18 with a 57mm lens; 0.55 to 0.8 with a 85mm lens; 0.47 to 0.69 with a 100mm lens; 0.35 to 0.51 with a 135mm lens. A similar magnification chart for different focal lengths is engraved on the barrel of the Auto Helicoid. Additional magnification can be obtained by using the focusing ring of the Auto Helicoid in conjunction with that of the lens mounted on it. The Auto Helicoid was only offered for a couple of years and is extremely rare.