Difference between revisions of "King Regula Rangefinder Lenses"

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Latest revision as of 15:58, 23 December 2014

The King Regula bayonet lens mount was introduced in 1956 for the King Regula IIIc and King Regula IIId rangefinder camera models. The mount was also used on the King Regula IIId Automatic, King Regula Super and King Regula Super Automatic rangefinder cameras.

A small range of lenses were made for the mount by the German lens makers, Enna, Isco and Steinheil in 28mm, 35mm, 50mm, 90mm and 135mm focal lengths. All lenses use a 45.5mm x 0.5mm (thread pitch) filter thread type for its filters, this thread seems to be unique to these lenses and makes filters for them quite rare and hard to find, known makers of these filters are BDB and Braun.


Wide Angle Lenses

Enna Ultra Lithagon 28mm f/3.5

  • Six elements, six groups lens design.


Enna Regula Lithagon 35mm f/3.5

  • Four elements, three groups, Tessar design.
  • Seven bladed aperture, heptagon shape.


Isco Regula Westron 35mm f/3.5

"Normal" Lenses

Enna Regula Ennalyt 50mm f/1.9

Enna Regula Ennit 50mm f/2.8

  • Four elements, three groups, Tessar design.


Isco Color Westagon 50mm f/1.9

  • Five bladed aperture, pentagon shape.


Isco Color Westanar 50mm f/2.8

  • Three elements, three groups, "Pancake" Anastigmat triplet design
  • Five bladed aperture, pentagon shape.


Steinheil Regula Quinon 50mm f/1.9

  • Five bladed aperture, pentagon shape.
  • Mechanically-moved depth-of-field pointers
  • Green ring graduated in flash guide numbers, this is set against a film speed scale and allows reading off of apertures along the distance ring.


Steinheil Regula Culminar 50mm f/2.8

  • Four elements, three groups, Tessar design.
  • Mechanically-moved depth-of-field pointers
  • Green ring graduated in flash guide numbers, this is set against a film speed scale and allows reading off of apertures along the distance ring.


Long Focus Lenses

Isco Color Westanar 90mm f/3.5

Isco Regula Tele Westanar 135mm f/3.5

  • Five bladed aperture, pentagon shape.


Enna Regula Ennalyt 90mm f/3.5

  • Four elements, four groups.


Enna Regula Ennalyt 135mm f/3.5

  • Five elements, four groups.
  • Seven bladed aperture, heptagon shape.