Archived posting to the Leica Users Group, 2005/02/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Yes and no. yes, with the same circle of confusion, etc. any 2 lenses of the same FL will have the same DOF. Change a parameter, and 2 lenses could look very different on spec, but perform identically.. It is called creative marketing. SOmeone else can give you a more scientific explanation..... this is the abbreviated version. The iris shape issue is a LOT more complicated. There are emotional issues and graphics art issues. Personally, I have no idea of the scientific issues, the ones that give you a straight answer. Frank Filippone red735i@earthlink.net Does the DOF of a lens only depend the focal length or can it vary ? The reason behind my question are different markings I have seen on lens barrels, for instance when comparing a CV 35mm Ultron to a Jupiter-12. Has Voigtlander just been more conservative ? Also, does the number of aperture blades affect image quality when a lens is closed ?