Archived posting to the Leica Users Group, 2008/09/23
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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