The WRE-2138 and WRA-2138 Float Lens panels are lenses dedicated to the use with Digital Backs. Both feature a Rodenstock 6,5/138 HR-Float Digaron lens with Rodenstock eShutter-250 (or Rodenstock Aperture Only Mount in the case of the WRA-2138).
This very special lens design is mounted in a helical focussing mount, which drives a floating element for optimal sharpness at any focussed distance.
The WRE-2138 and WRA-2138 fit to all Cambo Wide RS camera systems.
The Rodenstock HR Digaron-SW float 138 mm f/6.5 is an exceptionally sharp, long focal length, lens for adjustable technical cameras.
The optical design with eleven lens elements in ten groups is very complex for a prime lens. It has the highest possible resolving power extremely close to the diffraction limit. This is not only achieved across the entire field of the largest digital sensors – but also to the edge of it’s constant 110mm image circle.
For professional technical camera users, even with the largest sensor formats, this gives ample clearance for parallel shifts for perspective corrections without excessive stopping down of the aperture according to the Scheimpflug rule.
The rotation of the focusing ring automatically controls the floating elements group and all aberrations are therefore minimized throughout the whole focusing range. Even with extreme camera movements this lens remains tack sharp.
In the studio the electronic Rodenstock eShutter can be controlled easily via USB from the computer or with an app from an iPhone, iPod, iPad or a similar Android mobile device. It can also be operated with the remote controller Sinar eControl with a rechargeable Li-Ion battery offering independent use on location.
When mounted as the WRA-2138, the Rodenstock Aperture Only mount is a great option when working with the latest Digital backs with built-in sensor-activated Electronic Shutter. The aperture is manually set at the lens, and in this configuration, there are no need for any sync cables between lens and back.
Please note that limitations apply based on the individual model of digital back you are using. We refer to the manufacturer of the applicable digital backs for support and use of electronic shutter functions.
Shortest focal distance to object: approx. 1.0 mtr
Image circle of lens at any f/stop: 110 mm
CCD size 37x37mm: 33/33 mm
CCD size 33x44mm: 34/30 mm
CCD size 36x48mm: 30/26 mm
CCD size 37x49mm: 31/27 mm
CCD size 40x54mm: 28/24 mm
CCD size 36x56mm: 29/24 mm
Please note that the optical movements are larger than achievable due to mechanical limitation.
This lens is currently being released in small increments, with plans on a full production model being made available later this summer. Preorders are available now from any Cambo USA dealer.