David Young <telyt@xxxxxxxxx> wrote: >Philippe wrote: > >>Do you mean that current R optics provide a larger circle than >>needed for the 35mm format? > >Yes. The diagonal of a 24x36mm frame is 43.27mm ... so any lens >capable of covering a 35mm format, must have an image circle greater >than 43.3 mm. Thus, current optics would easily cover a 27mm by x36mm sensor. There are some lenses that will cover MUCH more than the 43.27mm diagonal. The image circle of the 280mm f/4.8 Telyt, for example, will cover the 6x6 format and has even been adapted to 6x7 cameras. I've also been told, but have not been able to confirm, that the image circle of the 400mm f/5 Telyt will also cover the 6x6 format. Doug Herr Birdman of Sacramento http://www.wildlightphoto.com -------------------------------------------------------------------- myhosting.com - Premium Microsoft® Windows® and Linux web and application hosting - http://link.myhosting.com/myhosting ------ Unsubscribe or change to/from Digest Mode at: http://www3.telus.net/~telyt/lrflex.htm Archives are at: //www.freelists.org/archives/leicareflex/