Archived posting to the Leica Users Group, 1998/11/09
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I attended an auction this weekend and bought a 50mm NF-Summicron at a very reasonable price. I had examined the item prior to the bidding, but only after buying it did I notice, upon shining a flashlight through the lens, that there are markings on the internal lens elements. The marks are faint, light/white "scratches", fairly numerous, that are shaped as concentric circles. They appear to be on one of the surfaces of the element closes to the rear element and seem perfectly circular. If you think of photographs of night skys, with startrails, that's pretty close to what it looks like. I don't actually know if they are scratches, hense the quotation marks. Does anyone know what these are? Can it be removed? I suspect that they will affect contrast and sharpness. They are quite faint (only detectable when shining a flashlight through the lens), but they are also quite numerous. Does anyone know for sure how these will affect the image quality? M. - -- Martin V. Howard, Application Systems Laboratory, | Dept. of Comp. & Info. Sci., Linkoping University, | Just "DOHH" it! SE-581 83 Linkoping, Sweden. Tel +46 13 282 421, +----------------+ Fax +46 13 142 231; marho@ida.liu.se; www.ida.liu.se/~marho