Archived posting to the Leica Users Group, 2012/07/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Yes good point. I wonder how well such ultrawides perform at its closest range? You don't hear about them having close range correction or do we? I have a 14mm 2.8 for my Nikon system which I use and I think I'll use it today it still light out. I have it racked out most of the time. Focused at its closest. That way everything you shoot looks less than a mile away. - - from my iRabs. Mark Rabiner http://gallery.leica-users.org/v/lugalrabs/ > From: John McMaster <john at chiaroscuro.co.nz> > Reply-To: Leica Users Group <lug at leica-users.org> > Date: Tue, 10 Jul 2012 19:52:17 +1200 > To: Leica Users Group <lug at leica-users.org> > Subject: Re: [Leica] Nikon forum advice (OT!) > > 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. >>>>> > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information