Archived posting to the Leica Users Group, 1998/01/23
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I am not sure which anomaly I experienced....all I know is that there was easily visible darkening of the corners. At 10:57 PM 1/22/98 -0500, you wrote: >In a message dated 98-01-22 16:46:25 EST, you write: > ><< > Francesco, > > >stellar performers. The 35 introduced visible corner vignetting > > [snip] > > >The 35/1.4 also worked very well wide open at night to capture scenes > >of a street market in Bangkok, lit only by street lamps.....no > >vignetting > > How can this be??? You mean no "visible" vignetting??? Isn't vignetting > a physical property of the lens due to construction parameters?? Or am I > wrong or missing something (again)??? > > Dick Hemingway > Norman, OK > > >> >Fransesco and Dick, > >I think vignetting is the physical obstruction of the light path that cuts >into the image on the film, usually at the corners, and usually caused by >filters that protrude too far in front of the lens or an incorrect lens shade. >What Fransesco is referring to, I think, is not vignetting, but light fall-off >due to the fact that with a wide-angle lens, the distance to the corners is >substantially farther that to the center. It's the inverse-square law acting >here. > >Charlie > Francesco Sanfilippo, Five Senses Productions webmaster@5senses.com http://www.5senses.com/