William, Are these results scanned from the negatives or from RA-4 prints of those negatives. I couldn't really see far into the dark end of the grey-scale on any result, but there are many places between your scanning and my viewing where the losses can occur, if there are losses at all. On my monitor I could ~just~ discern the separation between steps 13 & 14 of the ISO800 sample, 12 & 13 for both the others, is that a fair appraisal? Brightening the display didn't improve the separation, it did enhance it slightly but it still ran out at the same steps. Could it be that the scanning is imposing its own limits on the results.
Colourwise, my experience is that the Kodak colour control patches are difficult to see colour shifts on, because they are pure colours. Better than that are the patches with many pastel shades (I think Macbeth makes one) where a small colour shift will make an original colour look like a completely different one. Otherwise it's a good guide to C-41 pushability considering that you used a reputably pushable film, a test like your's with consumer film would be illustrative. But I fear it's an unwinnable argument because "not good enough" for one persons needs will always be "good enough for government work" to someone else. Regards, Anthony Farr ----- Original Message ----- From: "William Robb" <[EMAIL PROTECTED]> (previous message snipped) > > Take a look: > > http://users.accesscomm.ca/wrobb/PJ800/ > > This was a film Kodak designed to be push processed. > The film was put through an in control C-41 processor, one strip > immediately after the other, to ensure that all three received > the same developer concentration and temperature. > The normal iso strip received correct processing. > The push 1 stop strip received 30 seconds (about 15%) extra > development. > The push 2 stop strip received an extra minute (about 30%) extra > development. > The additional processing time was derived from instructions > gleaned from Kodak literature. > Metering to determine the exposure was made with a Zone VI > modified Pentax Spotmeter. > The light source was 2x 500 watt quartz halogen yard lights. > An 80A filter was used to correct the light source, and the > manufacturers filter factor was applied to the base exposure > setting. > The normal negative appeared, to my eye to be correctly exposed. > William Robb > - - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
