Archived posting to the Leica Users Group, 1999/07/07
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thanks Bob... :-) Jim At 08:10 PM 7/7/99 -0700, you wrote: > >These programs confirm that Jim is correct. The reason the Summilux has "less" DOF than the Noctilux at the same subject distance is because it has a smaller field of view. They will give identical DOF at equivalent f/stops only if you move in with the Noctilux to frame the identical image. > >Now, to answer Jim's project, I looked at the Leica brochure and found that the Noctilux has a 45 deg field and focuses to 1 meter, while the Summilux has a 31 deg field and focused to .75 meter. > >Using the handy calculator, at their respective close focus distances (as reported in the brochure) the Noctilux has a DOF of .9 in and the Summilux has a DOF of .3 in. Jim is again correct! > >BTW, the Summilux focuses to an object of 192 x 288 mm, while the Noctilux only goes to 410 x 615 mm. > >Flamers on your marks: The R lenses can do better on close focus. > >I have to get a life. > >Bob Rose