Archived posting to the Leica Users Group, 2005/10/15

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

Subject: [Leica] #351 & #352
From: don.dory at gmail.com (Don Dory)
Date: Sat Oct 15 16:59:09 2005
References: <008701c5cef9$6f6fbea0$cdde4454@desktop> <434D8218.4020802@summaventures.com> <03fc01c5d03b$daf0f700$2501a8c0@chartertn.net> <p0623090bbf748aee3e45@10.0.1.4> <009601c5d0d4$87d5b120$2501a8c0@chartertn.net> <9b678e0510141310h50f7ae18i5d34dad13076db48@mail.gmail.com> <43516842.1010902@summaventures.com>

Peter,
I was not responding to your image, this one is clearly underexposed so that
there is no information to bring out. What I was specifically discussing was
the use of a filter to bring out a sky or other use of a B&W contrast
filter. Color negative film of C-41 B&W film does too good a job leveling
out the contrast range in a negative. But in the case of a sky with an
orange or red filter, you can burn down the sky to make an image that your
mind saw. On ordinary B&W film on a perfect Geebee cloud day you would be
hard pressed to burn in enough detail in the sky without the use of a
filter.
 Don
don.dory@gmail.com

 On 10/15/05, Peter Dzwig <pdzwig@summaventures.com> wrote:
>
> Don Dory wrote:
>
> > The good news is that the information is there, you just need to burn
> and
> > dodge to your hearts content.
> > :)
> > Don
> > don.dory@gmail.com
>
> Don,
>
> not sure I follow this. If the contrast in the original scene is below
> whatever
> threshold is required for differentiation by the emulsion then although
> **you**
> (or I or John) may see it the film won't - and if it isn't recorded by the
> emulsion you can't get it back by dodging.
>
> Look at:
>
> http://gallery.leica-users.org/album164/SouthBeachSunset20050810
>
> there was plenty of info that I could resolve by eye - the film, even at
> 400ASA
> couldn't respond to it. The combination of eye and brain is a marvellous
> imaging
> device which has been worked on for maybe 2 million years or roughly ten
> thousand times longer than the camera.
>
> You can only enhance information which is in the neg and that has to be
> done
> carefully otherwise you can create artefacts.
>
> Do I misunderstand you?
>
> Peter Dzwig
>
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>

In reply to: Message from geebee at geebeephoto.com (GeeBee) ([Leica] #351 & #352)
Message from pdzwig at summaventures.com (Peter Dzwig) ([Leica] #351 & #352)
Message from jblack at ambio.net (John Black) ([Leica] #351 & #352)
Message from jblack at ambio.net (John Black) ([Leica] #351 & #352)
Message from don.dory at gmail.com (Don Dory) ([Leica] #351 & #352)
Message from pdzwig at summaventures.com (Peter Dzwig) ([Leica] #351 & #352)