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[OM] What is Sharpness?

Subject: [OM] What is Sharpness?
From: "Thomas H. Hogan" <flzhgn@xxxxxxxxxxxxx>
Date: Sun, 11 Jan 1998 10:39:19 -0800
Lars, Marco, Shawn, et al,

I think there is a lot of confusion on just what sharpness
in photography really is.

When I want a sharp photograph, I use TechPan 2415 with a dilute
developer such as HC110 dilution F.  My understanding is that the
dilute developer will contribute to a greater definition between
grains which have received light and grains that have not due to
local exhaustion of developer between agitations.

Maybe some of the experts on this group could define sharpness or
give some examples of sharpness in print photographs -- did you
ever see the white line at the horizon in a landscape photo?

Can Ilford XP2 and the new chromogenic Kodak film have sharpness 
without grain since all the grains are
replaced with dye clouds ??

Hank Hogan    http://www.netcom.com/indexc.htm

Perhaps, heaven forbid, I am a "naive-observer"


> Wrote Marco:
> 
> >Thanks for sharing your knowledge... the fact you don't use the
> >standard (for T-Max) 24 °C temperature and pull the film points to
> >the "Microdol" style. I am sure the grain vanishes, but I wonder about
> >the sharpness looking of the prints. But you are right, this is a
> >formula to try.
> 
> Well, the film will probably still have greater resolution than our
> Zuiko lenses (obligatory OM content ;-)
> 
> But seriously, there is a kind of 'false sharpness' (actually, false
> acutance) which is an effect of the sharpness of the grain only.
> It is the edges of the grains that define the image edges, not the
> image projected by the lens. Naive observers---some of them
> commercial photographers who should know better---often think
> that a low-definition image with coarse but sharp grain is sharper
> than a fine-grain image.
> 
> In my experience, the best way to get sharper-looking pictures
> is the pro way---use a tripod, or at least some kind of support. I
> have a camera adapter for my hiking staff, and a backpack
> (especially one with an external frame) gan give practical support.
> I know of people who have screwed ball joint heads to theirs (their
> backpacks, not their hat hangers). A sniper-style sling support is also
> helpful occasionally.
> 
> Vänliga hälsningar/Best regards
> Lars Bergquist
> Välkommen till/Welcome to ...
> <http://www.bahnhof.se/~timberwolf/>
> 
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