Archived posting to the Leica Users Group, 2006/03/28
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Oh Lord, don't make me find that Erwin quote (his narrative is very un-textbook-like, and I have to read entire chapters to relocate information...he needs to work on his index). If my recollection is correct, high contrast and high resolution would be ideal, but in the real world of lenses, one has to compromise one to get more of the other. So, in any particularl lens, the designer has to decide which is more important...the resolution or the contrast. Jeffery Smith New Orleans, LA http://www.400tx.com -----Original Message----- From: lug-bounces+jsmith342=cox.net@leica-users.org [mailto:lug-bounces+jsmith342=cox.net@leica-users.org] On Behalf Of Don Dory Sent: Monday, March 27, 2006 9:21 PM To: Leica Users Group Subject: Re: [Leica] Re: New Orleans photos--Q for Jeffery Jeffery, I believe Erwin states that you can not have high resolution without high contrast. Simply, the lens can not show fine detail without the ability to deferentiate between extremely small differences and that takes a high transfer function or contrast. My personnal belief is that older lenses have a much larger core to focused points. Even when in focus there is a ring of information around the sharp point caused by residual aberrations. As the lens resolves finer and finer points these circles of confusion intermingle causing a loss of contrast. Your current lens choices will serve you proud in your endeavor. That look is one reason that I will never sell my DR. Don don.dory@gmail.com _______________________________________________ Leica Users Group. See http://leica-users.org/mailman/listinfo/lug for more information