Archived posting to the Leica Users Group, 2003/03/08
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]thanks simon - ----- Original Message ----- From: "Dante Stella" <dante@umich.edu> To: <leica-users@mejac.palo-alto.ca.us>; <rflist@topica.com> Sent: Saturday, March 08, 2003 2:52 PM Subject: [Leica] Re: film question > Film, especially 35mm film, is not capable of storing nearly as much > data as you might think. The more steps in the process, the worse. > > http://www.dantestella.com/technical/formats.html#small > > Is a discussion of film resolution and its theoretical limits with > continuous-tone subjects. Even when you plug in gigabit film's > theoretical resolution with a continuous tone image (700 lp/mm if I > recall), it is a joke, because you have to enlarge it or scan it with > equipment that is far less capable (59lp/mm is about the best you can > do without a drum scanner). > > The formula is on that URL above, so you can calculate you your heart's > content. If you use a scanner, use your lens resolution, film > resolution and scanner resolution (long-side resolution / 36mm / 2). > If you use a digican, it's the lens resolution and the sensor > resolution (take the long side resolution / sensor long side dimension > / 2 / 3). You can omit the last factor of 1/3 if you believe that > interpolation does not hurt resolution. > > Tech Pan on a Leica with a 120lp/mm objective stage gets you something > like 40lp/mm at best; a 6x9 camera with TMY (a 400 speed film) will get > 24lp/mm. > > Really kind of sobering. > > Cheers > Dante > > By contrast, with a typical 35mm setup, > > > On Saturday, March 8, 2003, at 07:19 AM, animal wrote: > > > Hi, i,m trying to find an article on the amount of information film can > > hold. > > So as to compare it with nanotech memories as described in > > http://www.zurich.ibm.com/st/storage/millipede.html > > would any of you point me in the right direction? > > simon > > > > -- > > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html > > > > > ____________ > Dante Stella > http://www.dantestella.com > > -- > 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