Using Photoshop for Zone/Speed Test

That's the approach I decided on. Thanks!!
"Tom Phillips" wrote in message
...


rgans wrote:

Hey, I"m a darkroom guy, too. I just thought it the tool would work, I
should use it. If it doesn't, no big deal.

An inexpensive visual densitometer you can get used
is far simpler, accurate, and a lot cheaper than a
scanner+PS.


"jjs" wrote in message
...
"f/256" wrote in message
...

"rgans" wrote in
message
...
Some additional info: when I scan in the gray card and convert to
RGB,
my
values are about 83/83/83, not 128/128/128. I don't know why that is
the
case.

Because the Zones and densities do not have a linear relationship
between
them.

Indeed true, and somehow this whole idea of using Photoshop as if it
were
truly a wet process replacement turns my stomach. I must be getting
older
than I thought.

Hi,

It looks like your scanner has incorrect brightness (and possibly
contrast) settings. Are you able to control these settings with your
scanner? This is where I would start.

Translating the Zone System into Photoshop should not be very hard to
do. I will give it a try and let you know if I've been successful.

Hope this helps.

Bartek

rgans wrote:
Some additional info: when I scan in the gray card and convert to RGB, my
values are about 83/83/83, not 128/128/128. I don't know why that is the
case.

RON
"rgans" wrote in message
...

I know I've read about this before (can't find anything about it, however).
What I would like to do is this: Use Photoshop (and a scanner) for a speed
test. That is, shoot a frame at Zone V, then Zone I. Develop and test. In
a class I had a while back, I remember using a densitometer to determine
Zone I for a particular film/developer combination. So, would this work:
scan in a gray card (18%); then scan in a sheet of film (in this case Tri-X
320 4x5 developed in HC110) which I shot at Zone V. In theory (if I'm
correct), the scanned sheet should closely resemble the scanner gray card,
right? And if so, what value would K have (in the RGB info panel) for Zone
I? And why? Or...why would this not work?

Thanks! I hope I've expressed this correctly.

RON
________________________________________________ _________________
B&W Landscape and Still Photography: http://www.ronaldgansphotography.com






--
http://bartus.org

Hi,

It looks like your scanner has incorrect brightness (and possibly
contrast) settings. Are you able to control these settings with your
scanner? This is where I would start.

Translating the Zone System into Photoshop should not be very hard to
do. I will give it a try and let you know if I've been successful.

Hope this helps.

Bartek

rgans wrote:
Some additional info: when I scan in the gray card and convert to RGB, my
values are about 83/83/83, not 128/128/128. I don't know why that is the
case.

RON
"rgans" wrote in message
...

I know I've read about this before (can't find anything about it, however).
What I would like to do is this: Use Photoshop (and a scanner) for a speed
test. That is, shoot a frame at Zone V, then Zone I. Develop and test. In
a class I had a while back, I remember using a densitometer to determine
Zone I for a particular film/developer combination. So, would this work:
scan in a gray card (18%); then scan in a sheet of film (in this case Tri-X
320 4x5 developed in HC110) which I shot at Zone V. In theory (if I'm
correct), the scanned sheet should closely resemble the scanner gray card,
right? And if so, what value would K have (in the RGB info panel) for Zone
I? And why? Or...why would this not work?

Thanks! I hope I've expressed this correctly.

RON
________________________________________________ _________________
B&W Landscape and Still Photography: http://www.ronaldgansphotography.com






--
http://bartus.org

"Bartek Plichta" wrote in message
...
Hi,

It looks like your scanner has incorrect brightness (and possibly
contrast) settings. Are you able to control these settings with your
scanner? This is where I would start.

Translating the Zone System into Photoshop should not be very hard to do.
I will give it a try and let you know if I've been successful.

What a joke! You can 'translate' all you wish, but if you don't do wet
darkroom work it means absolutely nothing; what you are doing is something
else entirely - so begins the thread "digital zone system" which I will
watch with great disinterest.

"Bartek Plichta" wrote in message
...
Hi,

It looks like your scanner has incorrect brightness (and possibly
contrast) settings. Are you able to control these settings with your
scanner? This is where I would start.

Translating the Zone System into Photoshop should not be very hard to do.
I will give it a try and let you know if I've been successful.

What a joke! You can 'translate' all you wish, but if you don't do wet
darkroom work it means absolutely nothing; what you are doing is something
else entirely - so begins the thread "digital zone system" which I will
watch with great disinterest.

In article , "jjs"
wrote:

What a joke! You can 'translate' all you wish, but if you don't do wet
darkroom work it means absolutely nothing; what you are doing is something
else entirely - so begins the thread "digital zone system" which I will
watch with great disinterest.

Now you' ve done it congratulations!!! Next we shall hear from
the "HMS Nutcase" to pipe in and expound on Zone Nazis and
how the digital age is no deterent to thier abuses of his pure
photographic b.s.
--
LF Website @ http://members.verizon.net/~gregoryblank

"To announce that there must be no criticism of the President,
or that we are to stand by the President, right or wrong,
is not only unpatriotic and servile, but is morally treasonable
to the American public."--Theodore Roosevelt, May 7, 1918

In article , "jjs"
wrote:

What a joke! You can 'translate' all you wish, but if you don't do wet
darkroom work it means absolutely nothing; what you are doing is something
else entirely - so begins the thread "digital zone system" which I will
watch with great disinterest.

Now you' ve done it congratulations!!! Next we shall hear from
the "HMS Nutcase" to pipe in and expound on Zone Nazis and
how the digital age is no deterent to thier abuses of his pure
photographic b.s.
--
LF Website @ http://members.verizon.net/~gregoryblank

"To announce that there must be no criticism of the President,
or that we are to stand by the President, right or wrong,
is not only unpatriotic and servile, but is morally treasonable
to the American public."--Theodore Roosevelt, May 7, 1918

On Thu, 18 Nov 2004 01:38:50 GMT, Gregory W Blank
wrote:

In article , "jjs"
wrote:

What a joke! You can 'translate' all you wish, but if you don't do wet
darkroom work it means absolutely nothing; what you are doing is something
else entirely - so begins the thread "digital zone system" which I will
watch with great disinterest.

Now you' ve done it congratulations!!! Next we shall hear from
the "HMS Nutcase" to pipe in and expound on Zone Nazis and
how the digital age is no deterent to thier abuses of his pure
photographic b.s.

Already, we see the effects of answering him. He's ba-a-a-ck!

Thankz jj and Tom and Dan. Great work. Not!


Robert Vervoordt, MFA

"Robert Vervoordt" wrote in message
...
On Thu, 18 Nov 2004 01:38:50 GMT, Gregory W Blank

Now you' ve done it congratulations!!! Next we shall hear from
the "HMS Nutcase" to pipe in and expound on Zone Nazis and
how the digital age is no deterent to thier abuses of his pure
photographic b.s.

Already, we see the effects of answering him. He's ba-a-a-ck!

That's one reason Blank, among others, is in my killfile.

"Robert Vervoordt" wrote in message
...
On Thu, 18 Nov 2004 01:38:50 GMT, Gregory W Blank

Now you' ve done it congratulations!!! Next we shall hear from
the "HMS Nutcase" to pipe in and expound on Zone Nazis and
how the digital age is no deterent to thier abuses of his pure
photographic b.s.

Already, we see the effects of answering him. He's ba-a-a-ck!

That's one reason Blank, among others, is in my killfile.