Rodenstock - Digital Lenses

The lens series HR Digaron-W with an image circle from 90 mm to 125 mm is the first choice for large sensors from 37x49mm up to 36x56mm or 40x54mm and for technical cameras, if parallel lens shift and lens swing and tilt require large camera movement. For an optimum performance of the highest-resolution sensors with 80 megapixels and more and a pixel pitch down to 6 µm, the optical design of both series HR Digaron-S and HR Digaron-W includes the thickness of the sensor glass plate. The shorter focal length of wide-angle lenses causes larger light incident angles at the margin of the image. This results 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 taken into consideration for the calculation of the lenses HR Digaron-W 40mm f/4, 50mm f/4 and 70mm f/5.6. A remarkable feature of the HR Digaron-W 40mm f/4 is the long back focal length of approx. 25mm.
The Rodenstock lens 90mm HR Digaron-SW with a 120 mm image circle is the first choice for shots with digital backs with sensor sizes up to 40 x 54 mm that require extreme camera movements or for stitching multiple shots. Best sharpness and high contrast is provided even for large scales.

The HR Digaron-SW 90 mm is an extraordinary standard lens for outdoor and studio shots in industrial photography and product photography.

The new Rodenstock HR Digaron-S lenses with a 70mm image circle (80mm for a focal lengths of 180mm) for sensor sizes from 24x36mm up to 33x44mm provide excellent sharpness and brilliance already from open aperture (f/4 to f/5.6).For reduced camera movement they are also recommended for sensor sizes up to 37x49mm and without any camera movement even for sensor sizes up to 36x56mm or 40x54mm. Even at the image corners sharpness is high enough to utilize the resolution power of the highest-performance sensors with up to 60 megapixels and a pixel pitch of only 6 µm (therefore we indicate the MTF for max. 80 line pairs per millimeter).
An image quality almost impossible up to now is realized due to perfect correction of curvature of field, integration of the 2mm thick sensor cover glass into the optical calculation and excellent correction of chromatic aberration in order to avoid color fringes.

Both lens series Apo-Sironar digital and Apo-Macro-Sironar digital (the latter is optimized for large scales) provide large image circles and leave enough space for camera movement. These lenses are ideal for use with digital scan backs as well as with chip backs having larger formats or for being used in the macro-scan mode for larger formats by stitching multiple shots made with laterally shifted back from one shot to the next. Resolving power is designed for a pixel pitch down to 9 µm. These lenses are the perfect solution for photographers who use both digital photography and roll film.