Archived posting to the Leica Users Group, 2011/07/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]For my work, documenting cities and streets, I need a system that is good from about 2m to infinity, whose MTF is uniform over the image (and so we sacrifice maximum MTF in the center, I suspect), that has a telecentric lens so the sensor need not be too complicated, that need not have a wide f/stop range , say f/2 to f/5.6 to avoid diffraction, and whose out of focus MTF shows gentle decline of quality. Does anyone know of such a lens, for any size negative. Charles Marville photographed Paris's streets in 1858-77 using wet collodion, time exposure and tripod, and 30x40cm plates. Small f/stop, lots of depth of field, monstrous negative, and so the detail is everywhere available. Quite amazing. If we go to at 2.4x3.6 cm sensor, and we do not use a tripod, what you need is focus stacking, and perhaps a burst of shots at each distance setting figuring that one will be when you are not shaking at all. But you also need a lens much as I have described above. Martin Krieger