Archived posting to the Leica Users Group, 2000/10/24
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Both the Cosina 15 and the Hologon have about a stop of vignetting at f16. It is not a function of light fall off due to inherent vignetting in wide open lenses with small exit pupils that affects more normal lens designs, but, it is inherent in the way super-duper-wides work. It cannot be fixed without a funny filter such as what the Hologons come with. John Collier > From: Pascal <cyberdog@attglobal.net> > >> Any lens this wide will have at least one stop of vignetting. I am surprised >> it is not more. > > It's more actually, wide open at f/5.6 (1.6 stops). > I said that, *even* at f/11 (two stops down), it still is one full stop ! >