Archived posting to the Leica Users Group, 1998/02/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I had the same experience using my 35 Summicron ASPH at night. However, I thought that the star pattern was due to the UV filter on it at the time. I haven't had the chance to confirm it yet. Stan Reinike Robert Rose wrote: > > I thought one of our more technical minded members might give an opinion on the cause of an interesting "feature" of my Leica lenses. > > I have noticed that when shooting available light pictures with my 35mm Summicron-M ASPH, small very bright light sources (almost point sources?) produce a star diffraction pattern on the image, almost like the result from a star filter, in the pattern of the aperture blades. > > I have also noticed this with my Vario Elmar-R f/4 35-70. > > For example, look at: http://amishalom.org/images/night.jpg > > (The image was on Reala, in an R4sP. I used spot metering on the houses, and the camera chose around 5 seconds or so at f/4, wide open. Scanned the image into Photoshop with the HP scanner, then used auto levels, saved as a progressive jpg.) >