Schneider Kreuznach CCTV High Resolution 17mm / F1.4 (400-1000nm high resolution multispectral design) SERIAL # 24002145 Description: This lens is a high resolution multispectral CCTV lens very much used in highly demanding environment of macro photography and industrial/cine work. It has no iris and no focus ring. It is just a fixed high resolution CCTV lens that you can use in astronomy projects with BIG sensors. It will produce some vignetting in 4/3" detectors. It works without vignetting on a 2200x3000 pixel (3,5um cell size) 10,51x7,74mm CMOS chip (specifically, Cypress IBIS4-6600), so you are guaranteed 2/3" compatibility with no vignetting and even beyond. Remember this is CS mount, and you will need a short focus distance of 12mm from back of lens to sensor. IRIS/DIAPHRAGM is PRESENT; You can provide 1-6v DC current and it will close or open (reverse polarity). Resolution and contrast are gorgeous!! More info: The 2/3" CS-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. Original cost about 1300. Very high end glass! Issues: some normal usage marks (lenses are perfect). Technical information: HTTPS://www.eureca.de/pdf/optics/schneider/Schneider.pdf TERMS: My descriptions are faithful. I am NOT a cold Corporation thinking up just in numbers and my selling here is a long term responsability activity. I want you to be sure you are paying for what I am describing. In fact, most of my items are over-described (I tend to look specifically for problems instead of overlooking them). If for some reason you think I missed it up, get back to me. I don't tend to mess around with people. Like most of you, I work out my life with others "Quid Pro Quo" style, which means that I TRY TO DO OTHERS WHAT I WOULD LIKE THEM TO DO WITH ME. My cameras and optical stuff are all stored in dry safe containers here (no leaks, no humidity, no vapors). They will be delivered to you exactly as you are watching them here. I ACCEPT ON HAND DELIVERY if you live in Madrid. I accept returns: 1) Items must be received back in same condition as when they left here. 2) You pay return shipping costs as long as there are not other issues (DOA, etc..), in which case I would pay return shipping.