Archived posting to the Leica Users Group, 2014/04/13

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Subject: [Leica] Comparing film and digital resolution
From: hopsternew at gmail.com (Geoff Hopkinson)
Date: Sun, 13 Apr 2014 17:56:50 +1000
References: <6BB0304864D946309D842C5A630088C2@billHP> <03c601cf5650$28fd8730$7af89590$@verizon.net> <55092C35B5464668B785619C87906C22@billHP> <1397373750.44396.YahooMailNeo@web87703.mail.ir2.yahoo.com>

i went for the practical contribution on this by posting part of a file
from the S.  The reaction was deafening ;-)


Cheers
Geoff
http://www.pbase.com/hoppyman


On 13 April 2014 17:22, FRANK DERNIE <frank.dernie at btinternet.com> wrote:

> Quite so. In many ways the potential resolution is not that important,
> since with a hand held camera the resolution is not always a limitation.
> Lack of flare and boke are both more important to me personally than
> resolution, but these are characteristics of lenses, not film/sensor.
> I have pictures from my 3.3 megapixel Canon D30 which I enjoy, and TBH I
> have rarely used film since I found that.
> FD
>
>
>
> >________________________________
> > From: Bill Pearce <billcpearce at cox.net>
> >To: Leica Users Group <lug at leica-users.org>
> >Sent: Sunday, 13 April 2014, 2:07
> >Subject: Re: [Leica] Comparing film and digital resolution
> >
> >
> >But aren't there other "measurements" of the quality of our photos than
> just
> >resolution?
> >
> >-----Original Message-----
> >From: FRANK DERNIE
> >Sent: Saturday, April 12, 2014 11:35 AM
> >To: Leica Users Group
> >Subject: Re: [Leica] Comparing film and digital resolution
> >
> >But surely a single grain in film is either exposed or not, whereas a
> pixel
> >has, depending on the sensor, thousands of brightness levels. So they are
> >not directly comparable and it would require a big patch of film
> containing
> >thousands of grains to display the range of tones a single pixel is
> capable
> >of, though clearly a patch of pixels would be required to compare the
> >effect.
> >
> >
> >
> >>________________________________
> >> From: Frank Filippone <red735i at verizon.net>
> >>To: 'Leica Users Group' <lug at leica-users.org>
> >>Sent: Saturday, 12 April 2014, 14:07
> >>Subject: Re: [Leica] Comparing film and digital resolution
> >>
> >>
> >>Several years ago, I did the calculations based upon the molecular
> >>particulate size of TMax100 film.  I picked that film because the density
> >>data was available, and it was the most consistent particulate size film
> >>available, and it was reputed to be the most consistent homogenous
> density
> >>mix of crystals within the sensitive film layer.
> >>
> >>My assumption was that the TMax100 crystalline molecule was the smallest
> >>discernible and quantifiable light capturing receptor.  Therefore, the
> >>closest analogy to a digital sensor pixel.
> >>
> >>As I remember it, the particulate size, and therefore the effective pixel
> >>density, was around 15MP per square inch.  The closest ( B+W only)
> >>comparison is the MM.
> >>
> >>The MM is about 10MP per square inch.
> >>
> >>Based upon this, and for all practical purposes, digital sensor
> technology
> >>resolution has caught up with chemical resolution.
> >>
> >>Too much time on your hands is a bad thing......you worry about things
> that
> >>are purely theoretical.  This happened to me as well when I first
> retired.
> >>Seems a pattern....
> >>
> >>Frank Filippone
> >>Red735i at verizon.net
> >>
> >>
> >>
> >>_______________________________________________
> >>Leica Users Group.
> >>See http://leica-users.org/mailman/listinfo/lug for more information
> >>
> >>
> >>
> >
> >_______________________________________________
> >Leica Users Group.
> >See http://leica-users.org/mailman/listinfo/lug for more information
> >
> >
> >_______________________________________________
> >Leica Users Group.
> >See http://leica-users.org/mailman/listinfo/lug for more information
> >
> >
> >
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>


Replies: Reply from john at mcmaster.co.nz (John McMaster) ([Leica] Comparing film and digital resolution)
In reply to: Message from billcpearce at cox.net (Bill Pearce) ([Leica] Comparing film and digital resolution)
Message from red735i at verizon.net (Frank Filippone) ([Leica] Comparing film and digital resolution)
Message from billcpearce at cox.net (Bill Pearce) ([Leica] Comparing film and digital resolution)
Message from frank.dernie at btinternet.com (FRANK DERNIE) ([Leica] Comparing film and digital resolution)