> > From: "Jostein Øksne" <[EMAIL PROTECTED]> > Date: 2006/11/07 Tue AM 11:53:10 GMT > To: "Pentax-Discuss Mail List" <[email protected]> > Subject: Stupid Q. about central vs. curtain shutter > > If it was possible to make a focal-plane shutter like the central > shutters in eg. hasselblad lenses, I suppose someone would have done > it a long time ago. > > Does anyone know why this is not a good idea? > > Jostein
If I understand the concept correctly, the leaf shutter in a lens works at a node, where all the light rays cross. Or, at least, as close to that as they can. This allows them to be quite small and responsive. If they were at focal plane, they would have to be much, much bigger and more complicated. This would make them less responsive. I suspect that there would have to be some innovative design to make exposure consistent across the frame, also. What brought this on? ----------------------------------------- Email sent from www.ntlworld.com Virus-checked using McAfee(R) Software Visit www.ntlworld.com/security for more information -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
