Archived posting to the Leica Users Group, 2006/06/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Well actually, the Olympus lenses are not bigger than comparable Nikon, Canon, and Leica lenses for 35mm SLRs. Look, for example, at the 50 mm f2 macro - Its a good deal smaller than the 60 macro 2.8 nikon. But why do you care, Frank? You're going to stick with film until you have to make it yourself. ;-) ...... Original Message ....... On Thu, 15 Jun 2006 16:02:55 -0700 "Frank Filippone" <red735i@earthlink.net> wrote: >Maybe I missed something, but I have not read an argument as to the need to make digital lenses bigger for the smaller sensor than >24x36 film. There may be an issue that I am not aware of, but marketing issues must be put aside to make sense technically. The >availability of some Olympus lens of size X is a marketing issue. Technical details would be helpful. > >Comparing the size of true WA to Retrofocus designs is apples to oranges. But if this is the comparison issue, then yes, the >retrofocus design will be bigger and yes it will have higher angle ( less oblique) of attack to the sensor, and therefore "better" >for digital sensors. But I already stated this point. My comment about using R lens designs on a M mount lens. Makes sense to me. > >What I said is that for a smaller target sensor ( digital or film) the lens can be designed smaller because the image circle is >smaller. This is of course for the same F stop and Fl lens. It is the same argument for Retrofocus lenses as it is for true WA >lenses. Smaller target = smaller optics. Always true given the same lens design. > >Why is the Olympus lens larger? Beats me. I have no idea why the >designers made it that way. Is there a way we can ask them? > >I am open to continued discussion on this subject. > >Frank Filippone >red735i@earthlink.net > > > >_______________________________________________ >Leica Users Group. >See http://leica-users.org/mailman/listinfo/lug for more information ___ Sent from handheld device. Please forgive any typos or spelling errors.