Archived posting to the Leica Users Group, 2012/07/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Very possible at closer distances ;-) With the newer higher density sensors it is effectively reduced even more..... DoF for 15mm @ f5.6 and focus on 3m: 30-micron pixel sensor 0.96m - infinity 5-micron pixel sensor 2.22m - 4.65m 36MP on 24x36 is changing the whole ballpark At f2.8 and 30cm focus only 2cm DoF on 5-micron sensors! john -----Original Message----- A little hard though to get anything out of focus with a 15mm lens on a 24x36 image area. So its hard to call it a bokeh issue. Its just asphs are going to help make it a better lens issue. - - from my iRabs. Mark Rabiner http://gallery.leica-users.org/v/lugalrabs/ > > And the 15 Zeiss was the tipping $ point that was not made by Cosina, > putting it out of my reach. I do have the 15 VC but virtually never use it. > > I regret not doing a PAW, and admire those doing a PAW or PESO. The > pressure of doing a PAW made me think photographic thoughts every day. > And, pathologically, digital seem to steal some of the magic. Instead > of scanning > 36 frames, I was editing 720 frames. > > Sent from my iPad > > Jeffery L. Smith > New Orleans, Louisiana > USA > > On Jul 9, 2012, at 22:24, John McMaster <john at mcmaster.co.nz> wrote: > >> I think the 15mm is the only asph in the ZM range. I suspect that the >> Zeiss SLR range will start to get asph lenses as CA is a big issue on >> the D800(E) with them. >> >> john >> ________________________________________ >> >> >> I'm willing to throw Zeiss into that as well. I'm not sure that Zeiss >> uses as much asph as Leica, or if they just don't mention it in the lens name. >> >> It is probably a flaw in my standards that I don't care so much about >> corner sharpness. If the corner is that important, I should have put >> it in the middle instead of the corner. >> >> Other than my Russian lenses, virtually everything I own is good >> enough for me (= better than me). I really don't like anything about >> zoom lenses and rarely use them on my dSLR cameras. >> >> Sent from my iPad >> >> Jeffery L. Smith >> New Orleans, Louisiana >> USA >> >> On Jul 9, 2012, at 21:49, John McMaster <john at mcmaster.co.nz> wrote: >> >>> Ah, I was talking Leica asph ;-) >>> >>> john >>> ________________________________________ >>> >>> >>> The Voigtlander 50/1.5 Nokton was perhaps the first really sharp, >>> afforable, asph lens that people hated for its bokeh. The trend in >>> thinking seemed to be that reducing aberrations with asph elements >>> benefitted everything except bokeh. >>> >>> I think every lens needs to be assessed on its own merit. I don't >>> have any bad Leica lenses, though the old 50/3.5 Elmar performs like a Russian copy. >>> Wait, maybe it is.... >>> >>> The 50/2.5 Hexanon is better. >>> >>> Sent from my iPad >>> >>> Jeffery L. Smith >>> New Orleans, Louisiana >>> USA >>> >>> On Jul 9, 2012, at 20:56, John McMaster <john at mcmaster.co.nz> wrote: >>> >>>> I think that is a widely held misconception.... >>>> >>>> john >>>> ________________________________________ >>>> >>>> >>>> By the way, George, you had some incredibly creamy-bokeh shots >>>> posted the other day, and one of them was with an aspherical Leica >>>> lens(!). It blew away my bias that aspherical = bad bokeh. >>>>