chris1664876655 Posted October 4, 2003 Share Posted October 4, 2003 I shot two pictures back to back. One with a 81A warm up filter and one without. I had the Kodok Gold 100 processed by Perfect Touch. Here are the images from the Kodak Picture CD. I wanted to see if the filter would have any effect or be nulled out by the processing. Link to comment Share on other sites More sharing options...
chris1664876655 Posted October 4, 2003 Author Share Posted October 4, 2003 Here is the the shot with the filter.<div></div> Link to comment Share on other sites More sharing options...
chris1664876655 Posted October 4, 2003 Author Share Posted October 4, 2003 And without.<div></div> Link to comment Share on other sites More sharing options...
Jerry_ Posted October 4, 2003 Share Posted October 4, 2003 "Perfect Touch" is probably .87 seconds longer in the read portion of the image scan before printing. It is a machine print done in a speedy run through the lab to meet the deadline of getting it back to your store. Some images may be 'better' after "Perfect Touch" and some may not be done for better or worse. Link to comment Share on other sites More sharing options...
n m Posted October 6, 2003 Share Posted October 6, 2003 Can someone clarify this point if it is not a trade secret: is this processing some electronically digitized projection or is the negative image projected directly onto the paper? Link to comment Share on other sites More sharing options...
john_shriver Posted October 6, 2003 Share Posted October 6, 2003 <p>Filtration will, of course, affect the negative. So the film processing can't balance it out.</p> <p>But the Photo CD process is not "straight" for scanning color negatives, they attempt to correct the color balance, just as in color printing. Here's a quote from a <a href="http://www.library.cornell.edu/preservation/kodak/kodak-appendices/form7.htm">paper</a> by the Cornell University Libraries:</p> <blockquote>Color negative film scanned on PIW systems is automatically analyzed for color and density. The analysis algorithm otherwise known as the Scene Balance Algorithm or SBA, produces color balance values which normally are applied to the scanned image. The operator can then make additional manual adjustments based on the preview image on the monitor.</blockquote> <p>The PIW is the Photo Imaging Workstation, which is the Photo CD scanner system. They go on to note that good Photo CD service bureaus can turn off SBA.</p> <p>In print film, you really do the color balance in the printing. Color balancing filters are mostly relevant to color slide film. If you want color control in color printing, either you do it yourself, work closely with a custom lab, or do it in a digital darkroom at home (with ICM calibration).</p> Link to comment Share on other sites More sharing options...
psul_aul Posted November 17, 2003 Share Posted November 17, 2003 clouds have more definition with the warming filter that the only difference i see Link to comment Share on other sites More sharing options...
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