distagon_4_18mm_zm_e

Distagon T* 4/18 ZM Carl Zeiss AG Camera Lens Division 73446 Oberkochen Germany Tel: +49 (0) 7364 20-6175 Fax: +49 (0) 7364 20-4045 E-Mail: photo@zeiss.de www.zeiss.com/photo The space captor Panoramas, landscapes, architecture, photos with dominating foreground and wide background, photography in confined spaces is the profession of this lens. It offers excellent optical performance in a 100 degree diagonal field angle and it’s distortion is almost invisible. Despite it’s comfortable F4 maximum aperture the photographer will enjoy the compactness and light weight of the lens. A full metal barrel, 1/3 f-stop’s, a sophisticated operating concept mark it distinctively as a member of the Carl Zeiss ZM lens family. This lens still provides an astonishing wide angle effect even when used with digital rangefinder cameras. Because of its wide field angle and the need of an external viewfinder this lens is ideally combined with the Zeiss Ikon SW camera body. Focal length: 18 mm Aperture range: f/4 – f/22 No. of elements / groups: 10 / 8 Focusing range: 0,5 m – infinity Image ratio at close range: 1 : 23 Coverage at close range: 56 cm x 84 cm Angular field, diag./horiz./vert.: 98° / 87° / 65° Position of entrance pupil: 17 mm behind front lens Filter: M58 x 0,75 Weight: 320 g Dimensions: ø 65 mm, length incl. caps: 73 mm Length bayonet to front : 47mm April 2007. Subject to change Technical Specification Distagon T* 4/18 ZM Carl Zeiss AG Camera Lens Division 73446 Oberkochen Germany Tel: +49 (0) 7364 20-6175 Fax: +49 (0) 7364 20-4045 E-Mail: photo@zeiss.de www.zeiss.com/photo Performance data 0 20 40 60 80 100 0 5 10 15 20 u' [mm] 0 20 40 60 80 100 0 5 10 15 20 u' [mm] -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 0 5 10 15 20 u'[mm] 0 20 40 60 80 100 0 5 10 15 20 u'[mm] f-number: k = 4 f-number: k = 8 Relative illuminance Distortion Sagittal - - - Tangential Sagittal - - - Tangential k=4 · · · k=8 Modulation transfer T as a function of the image height and slit orientation: White light. Spatial frequencies R=10, 20 und 40 cycles/mm. MTF [%] MTF [%] E [%] V [%]t