Archived posting to the Leica Users Group, 2012/06/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thanks for the explanation, Howard. I haven't detected any such drift with my Olympus bodies, but will check it, now that I am aware of the problem. Jim Nichols Tullahoma, TN USA ----- Original Message ----- From: "H&E Cummer" <cummer at netvigator.com> To: <lug at leica-users.org> Sent: Sunday, June 10, 2012 8:04 AM Subject: [Leica] Using M (and R) glass on a Sony NEX-7 > > Date: Sat, 9 Jun 2012 16:13:38 -0600 > From: Bill Nelsch <photobynelsch at gmail.com> > Subject: Re: [Leica] Using M (and R) glass on a Sony NEX-7 > To: Leica Users Group <lug at leica-users.org> > > I have a stupid question: When you say the D7000 is "linear" - what does > that mean actually? How does that affect the exposure? > > Bill in Denver > > Hi Bill, > By linear I mean that as you close down the lens aperture the shutter > speed drops by an equal amount in terms of light transmission > If you are at f5.6 and 1/500 and then close down to f8.0 the shutter speed > adjusts to 1/250 - to f11.0 the shutter speed drops to 1/125 > keeping the light transmission the same. That's what happens on the Nikon. > On the Canon without Canon lenses that "talk" to the body > as you close down a Leica R lens mounted with an adapter that isn't > chipped the shutter speeds drift away from the above response and you get > more and more exposure variation. > Hope this clarifies my point for you. > Cheers > Howard > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > >