120 film has at least 2.8 times (645) or 4.3 (67) the area of 35mm film per shot.
10MP * 2.8 == 27MP != 17MP. 10MP * 4.3 == 43MP != 17MP. 6MP * 2.8 == 16.7MP ~ 17MP 6MP * 4.3 == 26MP != 17MP the simple kind. and, yes, MF lenses are every bit as good as 35mm (comparing best to the best and mediocre to mediocre) so according to your own numbers, 17MP is the lower bound on 120 format(s) -- the smallest one (645) under average conditions. this is again, according to your own post. in other words, "17MP" is bullshit. mishka On 9/19/05, Adam Maas <[EMAIL PROTECTED]> wrote: > I suspect you are misunderstanding me. > > Here it is again. Under average conditions, 6MP about equals the best > 35mm films, 8MP will do a little better. Under ideal conditions ~10MP > equals 35mm. The conditions affect the resolution of the film more than > it does the resolution of digital, which doesn't tail off as quickly as > film resolution does under poor conditions (Grain size varies, sensor > site size is fixed, combine with the linear response of digital sensors > and digital has advantage under poor conditions that disappears under > ideal conditions). Note that this is for APS and FF Bayer sensors of > traditional design (I'm not getting into the Foveon and Fuji sensors), > the little sensors in most Prosumer P&S's do not fare as well (6MP > DSLR's generally outperform 8MP Prosumer cameras for resolution) > > A 17MP camera can match the resolution of 120 film in most cases, as > proven by teh Canon 1Ds mk II. > > > > > Mishka wrote: > > >do the math (the simple kind: multiplication and division) > > > >mishka > > > >On 9/19/05, Adam Maas <[EMAIL PROTECTED]> wrote: > > > > > >>They do not contradict at all. When used under ideal conditions, 35mm > >>film is still exceeded by a 10+MP sensor (All other things being equal > >>and using glass of sufficient quality). 17MP can match 120 film. > >> > >>-Adam > >> > >> > >> > >>Mishka wrote: > >> > >> > >> > >>>Those are mutually contradictory statements. Both cannot be true at the > >>>same > >>>time. > >>> > >>>mishka > >>> > >>>On 9/18/05, Adam Maas <[EMAIL PROTECTED]> wrote: > >>> > >>> > >>> > >>> > >>>>It takes 10+MP to exceed 35mm film under idea; conditions, and as the 1Ds > >>>>mkII > >>>>has shown you can match 120 film with 17MP. > >>>> > >>>> > >>>> > >>>> > >> > >> > >
