Archived posting to the Leica Users Group, 2014/04/12

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: [Leica] Comparing film and digital resolution
From: hlritter at bex.net (Howard Ritter)
Date: Sat, 12 Apr 2014 11:25:40 -0400
References: <osxM1n00u0AFV7C01sxN9J> <6BB0304864D946309D842C5A630088C2@billHP> <03c601cf5650$28fd8730$7af89590$@verizon.net>

Yeah, too much idle time is dangerous.
Excuse me, I?m off to just take some nice pictures!

?howard


On Apr 12, 2014, at 9:07 AM, Frank Filippone <red735i at verizon.net> wrote:

> 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



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)