Archived posting to the Leica Users Group, 2008/09/23
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]There have been some optically corrected adapters... IOW, adapters that used optical elements to "fix" body thicknesses. And certainly the mirro inside the S2 will require a different body thickness... I think. But I point out that we are operating totaly in the dark. We are all right and all wrong at the same time. When Leica wants us to have more S2 info, they will tell us or leak it to us. When the R10 happens, we will know something. Frank -----Original Message----- >From: Ken Iisaka <ken@iisaka.org> >Sent: Sep 23, 2008 8:41 PM >To: Leica Users Group <lug@leica-users.org> >Subject: Re: [Leica] S2 hits Photokina > >Given the sensor area of 30x45mm, I would suspect that the register distance >or flange/back distance would have to be greater than on Leicaflex/R cameras >as the reflex mirror would have to be 25% larger. If an adaptor is made, I >would expect it to be a teleconverter with a ratio of 1.4x, and the lenses >with protruding rear element would be unusable. >Still, the thought of putting the Summilux-R 80mm on an S-2, effectively a >110mm/1:2 sounds very intriguing. > >On Tue, Sep 23, 2008 at 8:04 PM, <red735i@earthlink.net> wrote: > >> And to make THAT worse, the amount of "acceptable" vignetting is a >> relatively undefined value. >> >> What you can be sure of is that leica will tell us, when they are >> ready.... >> >> I think it was Steve or Doug that mentioned that it is feasible that R >> lenses could work 100% with an adapter, But with a smaller useable sensor >> area.......like in 24x36mm. I think this was a good input. >> >> Wee will have to wait... >> >> Frank >> >> -----Original Message----- >> >From: Tom Schofield <tomschofield@comcast.net> >> >Sent: Sep 23, 2008 10:17 AM >> >To: Leica Users Group <lug@leica-users.org> >> >Subject: Re: [Leica] S2 hits Photokina >> > >> >Even within the circle you see on the paper, there are degrees of >> >brightness, which we call vignetting, that are a judgment call as to >> >what degree of vignetting you will accept as being the "image circle". >> > >> >Tom >> > >> > >> >On Sep 22, 2008, at 8:33 PM, red735i@earthlink.net wrote: >> > >> >> Not to beat around the bushes: Wrong. >> >> >> >> Yes, an lens creates a circular inmage circle. >> >> The way to think about this is to place a circle on a sheet of paper. >> >> Over it, place 2 small black pieces of paper... one 24x36mm the >> >> other, 36mm square. You will see that the basic issue is the >> >> DIAGONAL of the sensor, not an edge dimension. >> >> >> >> try it out physically, then you will never be confused about image >> >> circle and coverage. >> >> >> >> Frank >> >> >> >> >> >> Now a technical question...the image from a lens is an image circle >> >>> correct? Not a rectangle, correct? Now a 35mm piece of film is a >> >>> rectangle so to make a larger sensor all one really would need to >> >>> do is >> >>> to make it square, 35mm square, and you'd have a larger sensor and >> >>> still >> >>> be able to use existing lenses, or am I WAY off on my thinking? >> >>> >> >> >> >> _______________________________________________ >> >> 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 >> >> > > >-- >Ken Iisaka >first name at last name dot org or com > >_______________________________________________ >Leica Users Group. >See http://leica-users.org/mailman/listinfo/lug for more information