Archived posting to the Leica Users Group, 2001/05/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]>http://www-personal.umich.edu/~dante/bokeh.jpg > >Sorry, guys, the Canon 1.5 has exactly the same type of bokeh the 1.5 >Sonnar and 1.5 Jupiter have (to say nothing of the 1.5 Nikkor). Those >triangles in Kyle's picture are something else entirely. Maybe flare. Maybe "coma." Although it looks extreme, usually circles with a streamer - ie, a streamer with a rounded end. Looks like an icecream cone. As I remember it vaguely from when I was grinding telescope mirrors it is caused by rays which before refraction (lens) are not parallel to the optical axis and the farther the distance of the image from the center of the focal plane the greater the distortion. Try the dreaded Christmas Tree test. Lights on the tree may be so deformed and look like little icecream cones. End of memory. Dick Hemingway Plano, TX