Archived posting to the Leica Users Group, 2012/03/04
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On Mon, Mar 5, 2012 at 11:09 AM, mehrdad <msadat at gmail.com> wrote: > notably lenses, there is not much around that can resolve 40 meg I have no idea where these persistent ideas that we are approaching the resolution of currently available lenses come from. Maybe it's because the finest set of lines on an MTF chart correpond to 40lp/mm, but that's misinterpretation of MTF data. The sensor of the S2 has a 45x30mm sesor, 7512 x 4992 pixels and has a 6?m pixel pitch. The Pentax 645D has a 44x33mm sensor, 7264 x 5440pixels and also has a 6 micron pixel pitch. These sensors resolve about 60 lp/mm. This is well within the capacity of good (but not exceptional) medium format lenses. Really good medium format lenses will already exceed that wide open across the whole field. It's also important that improving sensor resolution will produce an observable improvement in image resolution until the lens resolution drops to half that of the sensor. The improvement is useful. The lenses are good. Marty