If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Paper ISO'S
Are paper iso's useful? I ask because my standard, black toned print paper
has an iso of 200 and the warm tone paper I'm trying this week has an iso of 160. Now, I realize that there's a large issue in comparing the densities on these 2 papers (eg a brown tone paper will always reflect more light in the shadows because brown, no matter how dark, is always lighter than black...), but my test results indicate that the brown tone paper needs 2.1x the exposure of the black paper to produce a comparable print. This is not what I expected when I thought that paper iso's would be like film iso ratings. -LS |
#2
|
|||
|
|||
Paper ISO'S
"Lew" wrote in message ... Are paper iso's useful? I ask because my standard, black toned print paper has an iso of 200 and the warm tone paper I'm trying this week has an iso of 160. Now, I realize that there's a large issue in comparing the densities on these 2 papers (eg a brown tone paper will always reflect more light in the shadows because brown, no matter how dark, is always lighter than black...), but my test results indicate that the brown tone paper needs 2.1x the exposure of the black paper to produce a comparable print. This is not what I expected when I thought that paper iso's would be like film iso ratings. -LS They are probably useful as a rough guide in comparing papers. I don't have a copy of the ISO standard for paper but even for film the preamble to the standard states that its only a guide, I suspect the same is true of the paper standard. -- --- Richard Knoppow Los Angeles, CA, USA |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
"Print So Fine" paper developer | [email protected] | In The Darkroom | 20 | February 13th 06 01:31 AM |
Photo printing with Epson C84 -- what paper to use? | [email protected] | Digital Photography | 10 | March 27th 05 04:03 AM |
Don't bother with Ilford paper & Canon i9950 | BenOne© | Digital Photography | 13 | December 1st 04 05:33 AM |
Light struck colour paper? | Ken Hart | In The Darkroom | 1 | September 20th 04 11:06 PM |
contact print exposure time | John Bartley | Large Format Photography Equipment | 16 | July 12th 04 10:47 PM |