23APO

NWS Instruments AG

Work from experts
Technical Details

For original image size files, please click on each photograph

English

Ralph Wentz

Please allow me to introduce myself: I'm Ralph Wentz, head and eye of RAW, a studio for photography and design based in Cologne, Germany. As a photographer, I prefer the clear and precise image, specializing in people and portrait, interiors and architecture. Being interested in the entire body of work, I feel equally at home with product, corporate and industrial photography.

My fine art portrait work is highly regarded by private clients all around Germany. At ease leading a large team or working solo, my aim is to allow for spontaneity and creativity within a well-planned framework.

But in the end my photography has to be as simple as possible: There is light and shadow and there is passion, dedication and love for what I do and the deepest respect for everything and everyone I photograph and work with. This is not only the foundation for a great picture but for a good and fulfilled life as well.

Exactly these values I found when I came across the seriously crazy folks at NWS. They have the greatest respect for us photographers and our work and they want to supply our profession with equipment that has unrelentingly high standards. At the same time, they are passionate about what they do. That makes us allies, because we hold ourselves and those we work with to a positive outcome and the benefit of the best result possible. Why is that? Very simple, because we love what we do.

Erlauben Sie mir, mich vorzustellen: Ich bin Ralph Wentz, Kopf und Auge von RAW, einem Studio für Fotografie und Design in Köln. Als Fotograf bevorzuge ich das klare und präzise Bild und habe mich auf People, Porträts, Interiors und Architektur spezialisiert. Da mich jedoch die gesamte fotografische Arbeit interessiert, fühle ich mich in der Produkt-, Unternehmens- und Industriefotografie gleichermaßen zu Hause.

Meine Fine Art Porträts werden darüber hinaus von Privatpersonen in ganz Deutschland geschätzt. Von der Arbeit im großen Team bis hin zu Soloprojekten ist es immer mein Ziel, während der Shootings Spontanität und Kreativität in einem gut geplanten Rahmen zu ermöglichen.

Am Ende ist die Grundlage meiner Arbeit jedoch immer ganz einfach: Zum einen gibt es Licht und Schatten und zum anderen Leidenschaft, Hingabe und Liebe für das, was ich tue. Zudem empfinde ich den tiefsten Respekt für alles, was ich fotografiere und jeden Menschen, mit dem ich zusammen arbeite. Es entspricht meiner tiefsten Überzeugung, dass dies nicht nur die Grundlagen für ein großartiges Bild, sondern auch für ein gutes und erfülltes Leben sind.

Genau diese Werte fand ich, als ich auf die ernsthaft verrückten Leute bei NWS stieß. Sie haben den größten Respekt vor uns Fotografen und unserer Arbeit und sich zum Ziel gesetzt, uns mit Equipment auszustatten, das den höchsten Ansprüchen gerecht wird. Gleichzeitig sind sie leidenschaftlich in dem, was sie tun. Das macht uns zu Verbündeten, denn wir und alle, mit denen wir zusammenarbeiten, streben fortwährend nach den bestmöglichen Ergebnissen. Warum? Ganz einfach: Weil wir lieben, was wir tun.

Optical Specifications

  • Focal Length: 23 mm
  • Angle of Coverage: 110°
  • Image Circle: 70,0 mm
  • Rear Focal Distance: 74,9 mm
  • Lens Opening Range: f/ 3,5 to f/ 22
  • Focusing Distance Range: Infinity to 40cm from front lens surface

Mechanical Specifications

  • Filter connection: External to lens
  • Leveling Knob: Allows use of 2 different leveling options
  • Lens Hood: Reversible, retractable design
  • Lens Mount: Hasselblad V- compatible mount
  • Length: 135,0 mm
  • Lens Hood Diameter: 107,0 mm
  • Lens Barrel Diameter: 80,0 mm
  • Rear Lens Diameter: 43,0 mm
  • Weight: ca. 1.250 g

Detailed Instrument Description

The sophisticated design of the 23APO delivers a number of optical, mechanical and application innovations targeted at expert users:

  1. 120 lp/mm resolution with at least 50% Modulation Transfer Function (MTF50)
  2. 70,0 mm image circle to cover film/sensor formats including Micro 4/3, APS-C, Full Frame 24x36mm and medium format 33x44mm.
  3. 74,9 mm rear focal distance to ensure easy adaptation to nearly all film or digital camera mounts in production in 2019. The 23APO requires the use of an appropriate Hasselblad V-mount lens adapter for use with the target camera. The 23APO is not designed to be used on Hasselblad cameras due to mechanical incompatibilities.
  4. An optional, fully mechanical Shift Adapter provides the correct adaptation of the 23APO to cameras with Canon EF- and Nikon F-mounts. The adapter shifts laterally ±12mm and rotates 360° continuously around the optical axis with spring-loaded detents every 45° starting at Top Dead Center.
  5. Aperture control is fully manual with no dependencies on electronics, ensuring its compatibility with all camera systems. All f/ stops are adjusted steplessly with no detents using a German-made, 15-blade iris unit. Each f/ stop and in-between stops are marked on the aperture control ring. Point Spread Function (PSF) diameters in microns (µm) indicate corresponding lens performance at each lens opening.
  6. Focusing control is fully manual with no dependencies on electronics, ensuring its compatibility with all camera systems. A 90° rotation of the focus control ring brings the focused distance from infinity to the minimum focusing distance (from the front element) of 25cm or 10”. Distances are marked in meters and feet.
  7. An NWS Instruments invention: the built-in leveling feature
    1. The top of the leveling knob on the lens barrel is perfectly level with the top of the NWS Instruments Akrobat™ Modular Instrument Positioning System front frame, and a suitable carpenter’s level can be used to enable leveling.
    2. When the leveling knob on the lens barrel is removed, an optional, 16mm circular Wyler AG spirit level, Art Nr. 173-16-120, can be placed directly on the lens barrel to enable lens leveling with 20-30 arcmin sensitivity.
  8. An NWS Instruments invention: the 2mm-thick reversible, retractable lens hood
    1. The lens hood can be used in 2 positions: extended or retracted. In its extended position, it offers maximum protection from stray light intrusion without obscuring any part of the object image. In its retracted position, it enables the widest possible coverage angle especially relevant when the lens is tilted, shifted, swung or used with rise/fall.
    2. The lens hood is held in place in either extended or retracted position using Nylon-tipped spring-plungers on the lens barrel. When a position change is required, the lens hood is simply released from its current position by overcoming the light pressure exerted by the spring plungers.
    3. In the extended position, the lens hood is fitted on the lens barrel and securely positioned through four 1mm lands radially positioned on the lens barrel diameter. These lands work in combination with the spring-plungers to position the lens hood correctly, as well as providing load-bearing surfaces for resting the front of the lens hood on a horizontal surface.
    4. In the retracted position, the lens hood is fitted on the lens barrel and its 4 protrusions dovetails into the lens barrel. The spring-plungers on the lens barrel hold the lens hood in its position. The glass of the front element is fully exposed to enable maximum displacement potential.
  9. At the base of the lens barrel is a 360° scale around the circumference of the lens barrel. It is reserved for future feature implementations.

Future Products

Address


Niederlenzerstrasse 10
CH-5600 Lenzburg
Switzerland