Rodenstock eShutter 250 HR Digaron-W 5.6/70mm Lens

SKU: RD150062E

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Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
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Rodenstock eShutter 250 HR Specifications

  • Lens

    70 mm f/5.6

  • Ref. image scale

    1:Infinite

  • Recomm. working aperture

    5.6-8

  • Image angle

    70 Degree

  • Image circle diameter

    3.93" (100mm)

  • Maximum stitch or scan format

    2.12 x 2.91" (54 ½ 74mm)

  • Shutter size

    0

  • Push-on mount

    Diameter: 2.36" (60mm)

  • Filter thread

    M 58 ½ 0.75

  • Real barrel

    Diameter: 1.88" (48.0mm)

  • Flange foc. length

    2.86" (72.7mm)

  • Flange to lens end

    .92" (23.6mm)

  • Overall Length

    2.86" (72.8mm)

  • Weight

    With Copal: 12 oz (340g)

About Rodenstock eShutter 250 HR

The pixel size of the sensors of digital camera backs cannot be reduced just as one likes for achieving higher resolution with-out a significant increase of image noise and a reduction of exposure latitude. This is the reason why larger sensors have been developed for professional digital backs. However, digital lenses with image circle diameters of about 70 mm designed for smaller sensors do not allow sufficient camera movements.

This is why the new Rodenstock lens series HR Digaron-W/SW with larger image circles from 90 mm on and with an extreme-ly high resolution (very close to the physical limit of diffraction) has been developed. This new lens series comprises the focal lengths of 32 mm, 40 mm, 50 mm, 70 mm and 90 mm.The wide angle of view of the short focal length lenses causes larger light incident angles at the margin of the image.

This could result in some blur because of astigmatism, spherical aberration and color fringes produced by the protection glass of a thickness of approx. 2 mm in front of the light-sensitive sensor plane. This can be visible with high resolution sensors. Therefore, the optical effects of this glass plate have been tak-en into consideration for the calculation of all lenses.

A remarkable feature of the HR Digaron-W 32 mm f/4 and 40 mm f/4 (focal lengths equivalent to 20.6 mm and 26.5 mm for 35 mm format) is the long back focal length of 22.3 mm and 25 mm respectively. It leaves free space for shift and tilt movements between the rear mount and the sensor to avoid touching it or the rear standard. A flange focal length of ap-prox. 70 mm allows focusing at infinity with a flat lens board and permits the use of the larger Rollei Electronic shutter.