Schneider Kreuznach CCTV High Resolution 17mm / F1.4 (400-1000nm high resolution multispectral design) CAT # 18025355 Description: This lens is a high end CCTV lens very much used in highly demanding environment of macro photography and industrial/cine work. Resolution and contrast are no-compromise! This model has been modified to close/open iris through any 9-12v DC power source (black and red cables, you just invert polarity to reverse motor). It has manual focus back ring, so you can use it in you 4/3 camera set up! (It may produce a little vignetting, as it is intended for 2/3" CCDs). More info: The 2/3" C-Mount lenses are designed for a spectral range of 400-1000 nm and can be used in the visible and near infrared range, practically without focus difference. The high optical performance is achieved by a sophisticated optical design and the use of ultra low dispersion glass. A special broadband coating reduces stray light and increases transmission over the whole spectral range. The lenses are available with manual, motorized or video signal controlled iris, which makes them suitable for video surveillance as well as for technical applications. Original cost about 2000. Very high end glass! Issues: none, seems absolutely like-new. AutoIris tested and it works nice. Technical information: HTTPS://www.eureca.de/pdf/optics/schneider/Schneider.pdf (see page 3)