Archived posting to the Leica Users Group, 2005/03/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I asked Erwin Puts this yesterday and he states that it,s not so Acording to him F1 will still be twice as bright as 1.4 . He also mentioned that his credibility on digital fora is so bad that he dare not post on them. best simon jessurun ----- Original Message ----- From: "Don Dory" <dorysrus@mindspring.com> To: "'Leica Users Group'" <lug@leica-users.org> Sent: Thursday, March 17, 2005 1:33 PM Subject: RE: [Leica] Digital cameras with large aperture lenses > Adam, > Two mutually reinforcing actions are going on to make large aperture > lenses vignette on digital sensors. The first is the same as on wide > angle lenses; light rays from the edge of the lens are striking the CCD > at a relatively high angle and thus lost on the edge CCD's. The second > is that a micro lens by nature focuses the light to a point, however, if > the light ray is striking the micro lens at a sufficient angle, the > focus of the micro lens is not on the underlying CCD. > > 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 Adam Bridge > Sent: Thursday, March 17, 2005 1:50 AM > To: Leica Users Group > Subject: Re: [Leica] Digital cameras with large aperture lenses > > I don't understand how a microlens affects the full aperture > performance of a lens. More light is more light isn't it? So how would > this work? > > Adam > > > On Tue, 15 Mar 2005 14:39:16 -0800, Henning Wulff > <henningw@archiphoto.com> wrote: >> Regarding the recent discussion about fast lenses not having linear >> response re: their f/stops, and acting like slower lenses, here is a >> recent discussion on dpreview on the issue. Conclusions are similar >> to the ones voiced here. >> >> http://forums.dpreview.com/forums/read.asp?forum=1029&message=12649209 >> >> -- >> * Henning J. Wulff >> /|\ Wulff Photography & Design >> /###\ mailto:henningw@archiphoto.com >> |[ ]| http://www.archiphoto.com >> _______________________________________________ >> 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