Archived posting to the Leica Users Group, 2004/06/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Simon, Correct for the Fstop: inverse ratio of the diameter of the aperture by the focal length. So, changing the size of the image target does not change the amount of light coming through the lens, just the apparent size of the image. Actually, the image size is the same; with a smaller target you have to enlarge more for the same size final image. In 4X5 a 150mm lens is normal and in 35mm it is a medium telephoto. I suspect that some of us are really going to enjoy the duality of film/digital. Imagine the new 50 Summilux on a APS sensor digital, you would have a very fine 75 F1.4 and your 75 would become a truly spectacular 105ish lens. Don dorysrus@mindspring.com -----Original Message----- From: lug-bounces+dorysrus=mindspring.com@leica-users.org [mailto:lug-bounces+dorysrus=mindspring.com@leica-users.org] On Behalf Of animal Sent: Sunday, June 20, 2004 5:10 PM To: Leica Users Group Subject: Re: [Leica] Erwin on the new M-50/1.4 ASPH/digital sensor sizequestion When the sensor size changes so does the focal length doesn,t it?Why does the aperture stay constant ?Isn,t the f number a ratio of diameter divided by focal length? Simon ----- Original Message ----- From: "Slobodan Dimitrov" <s.dimitrov@charter.net> To: "Leica Users Group" <lug@leica-users.org> Sent: Sunday, June 20, 2004 11:41 PM Subject: Re: [Leica] Erwin on the new M-50/1.4 ASPH > Yeah, I could just about see his drool and spittle from that description. > Which brings up this debate, whether I'll get one for my R, if they wind up > making one, or one for the M! > S. Dimitrov > > > > From: "Jeffery Smith" <jls@runbox.com> > > Reply-To: Leica Users Group <lug@leica-users.org> > > Date: Sun, 20 Jun 2004 16:20:06 -0500 > > To: "'Leica Users Group'" <lug@leica-users.org> > > Subject: RE: [Leica] Erwin on the new M-50/1.4 ASPH > > > > I think he likes it. > > > > Jeffery Smith > > New Orleans, LA > > > > > > -----Original Message----- > > From: lug-bounces+jls=runbox.com@leica-users.org > > [mailto:lug-bounces+jls=runbox.com@leica-users.org] On Behalf Of Michiel > > Fokkema > > Sent: Sunday, June 20, 2004 3:49 PM > > To: Leica Users Group > > Subject: [Leica] Erwin on the new M-50/1.4 ASPH > > > > http://www.imx.nl/photosite/leica/mseries/SummiluxASPH/s14-50.html > > > > > > Best regards, > > > > Michiel Fokkema > > _______________________________________________ > > 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 > > _______________________________________________ > 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