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