Archived posting to the Leica Users Group, 2011/11/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]You are probably correct, Mark. I don't own any modern fast lenses, but, going back a couple of generations, I have Pentax Takumars in 50/1.4 and 55/1.8. The 1.4 Tak has a good reputation, but, in my comparisons, the 55/1.8 is a sharper lens in actual use, and is one of my favorite old lenses. Jim Nichols Tullahoma, TN USA ----- Original Message ----- From: "Mark Rabiner" <mark at rabinergroup.com> To: "Leica Users Group" <lug at leica-users.org> Sent: Wednesday, November 02, 2011 11:08 PM Subject: Re: [Leica] 1.8 vs. 1.4!?!? > In quite a few cases you're paying more for a lens which has a larger > outer > element giving you more flare than a slower cheaper lighter smaller lens. > I think in the past ten or fifteen years only its gotten to where you pay > more for a lens you actually get more. They make sure they make up for > whatever additional flare you may be getting. > > -- > Mark R. > http://gallery.leica-users.org/v/lugalrabs/ > > >> From: John McMaster <john at mcmaster.co.nz> >> Reply-To: Leica Users Group <lug at leica-users.org> >> Date: Thu, 3 Nov 2011 03:51:13 +0000 >> To: Leica Users Group <lug at leica-users.org> >> Subject: Re: [Leica] 1.8 vs. 1.4!?!? >> >> Usually not just speed differences, often a f1.8 is a superior performer >> than >> an f1.4 - with Leica as an exception ;-) DoF, build quality and >> size/weight >> are other typical differences.... >> >> john >> >> ________________________________________ >> >> >> 2/3's as a decimal is 0.6666. >> 0.7251 - 0.6666 = 0.0585 >> Cant figure out what fraction that would be. >> >> Bottom line a 1.4 is for sure faster than a 1.8 not by an incremental >> amount >> like I thought. >> >> >> >> >> -- >> Mark R. >> >> >>> From: Quan Tran <quantran101 at gmail.com> >>> Reply-To: Leica Users Group <lug at leica-users.org> >>> Date: Wed, 2 Nov 2011 19:36:00 -0700 >>> To: Leica Users Group <lug at leica-users.org> >>> Subject: Re: [Leica] 1.8 vs. 1.4!?!? >>> >>> I found this: http://imaginatorium.org/stuff/stops.htm >>> >>> When I select "precised", it show 0.7251 stops >>> When I select "third", it gave me 2/3 stops. >>> >>> -Quan. >>> >>> On Wed, Nov 2, 2011 at 3:32 PM, Mark Rabiner <mark at rabinergroup.com> >>> wrote: >>> >>>> I looked up f 1.8 vs. 1.4 thinking it was between a half and a quarter >>>> of a >>>> stop and they are saying its 2/3rds!?!?! Anybody know that that's true? >>>> >>>> Where is there a photo calculator that tells you these things?!?!? >>>> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > >