Archived posting to the Leica Users Group, 2003/03/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]thanks for the info simon - ----- Original Message ----- From: "Christer Almqvist" <chris@almqvist.net> To: <leica-users@mejac.palo-alto.ca.us> Sent: Monday, March 17, 2003 10:43 PM Subject: Re: [Leica] across tries > Simon, > > if you want a good indication of the resolution of a film you need a > test target with several sets of line pairs. Then you can compare > different films, but absolute figures are not for us amateurs to > determine. The test target will usually indicate the recommended > camera to test chart distance for directly translating the results to > lines per millimeter, the distance normally being expressed as a > factor of focal length. If you stick to this factor, you can compare > the resolution of different focal length lenses, but make sure you > use identical film and develop exactly the same way. Best way is to > do comparative lens tests on a single film. Don't forget the tripod, > and make sure light conditions are constant. > > Or are you wanting to see what film is giving the sharpest image? Not > necessarily the same thing as highest resolution. Generally finer > grain film gives higher resolution, but the pictures may not look all > that sharp. > > The highest resolution film in my experienced is Kodak Imagelink, but > it is hard to get hold of in the 35mm perforated variety. Kodak's > smallest pack is 20 rolls of 30,5 meter, enough for 20 times 18 rolls > of 36 exposures. About thirteen thousand frames. Much higher > resolution than TechPan, Agfa Copex and other smaller brand so called > super high resolution films. I'll try to write a summary of my > testing some time. > > Chris > > >Find this a nice film. > >http://www.leica-gallery.net/apekop/image-41552.html > >and an enlargement of the foot of the tower at > >http://www.leica-gallery.net/apekop/image-41554.html > >I,d like to try how much it can resolve with a tripod but think my scanner > >cant see a lot more.The crop is on an actual pixel level. > >best > >simon > > -- > Christer Almqvist > D 20255 Hamburg and / or > F 50590 Regnéville sur Mer > > please look at my NEW b+w pictures at: http://www.almqvist.net/chris/dozen/ > > old pictures still at: http://www.almqvist.net/chris/new > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html > - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html