Archived posting to the Leica Users Group, 2009/02/07
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Henning, I've never done LF but as I have always understood it, DOF doesn't relate to format size but to the lens' focal length and the distance of subject to film plane. So I don't understand the Sinar DoF scales relating to formats. On the other hand, a combination scale would make sense. ----- Original Message ----- From: "Henning Wulff" <henningw@archiphoto.com> To: "Leica Users Group" <lug@leica-users.org> Sent: Saturday, February 07, 2009 3:29 AM Subject: Re: [Leica] Is the DOF using a digital sensor any different than thatof film? > At 10:47 PM -0600 2/6/09, George Lottermoser wrote: >>And when i worked with a specific view camera lens >>it never occurred to me >>to ask if the DOF changed >>when I changed the back >>from 8x10 to 5x7 or 4x5 or 6 cm x 9 cm. >> >>DOF does not change >>with a format change. >>DOF changes only with >>a change of f:stop or >>with a change in distance >>between the lens and the plane of focus. >> > > George, you've used a Sinar, haven't you? On the depth of field > scale, attached to the rear fine focus adjustment, the DoF scales are > there for 4x5 or 5x7 or 8x10, or there is a combination scale. > They're different for each format. > > > >>Regards, >>George Lottermoser >>george@imagist.com >>http://www.imagist.com >>http://www.imagist.com/blog >>http://www.linkedin.com/in/imagist >> >>On Feb 6, 2009, at 10:26 PM, George Lottermoser wrote: >> >>> When I worked more with view cameras a loupe on the ground glass >>>gave me the information I needed. >> >> >>_______________________________________________ >>Leica Users Group. >>See http://leica-users.org/mailman/listinfo/lug for more information > > -- > > * Henning J. Wulff > /|\ Wulff Photography & Design > /###\ mailto:henningw@archiphoto.com > |[ ]| http://www.archiphoto.com > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.233 / Virus Database: 270.10.18/1937 - Release Date: 02/06/09 11:31:00