Practical printing and scanning test
2003-05-23 by Kevin Gulstene
There has been a lot of information on the list lately about a couple of topics. I wonder if there is any interest in doing two collective practical tests. The two questions that are of interest to me are: 1. How closely can you make a digital monochrome print from silver film match a digital monochrome print created from colour film. 2. What is the practical impact of the scanner hardware (ND filter, RGB scan, drum scan) on the quality of the scan and the quality of the resultant print. For question one we could proceed as follows: I would make two images from the same scene. One on Provia 400 and the other on Tri-x. I will have them both developed and drum scanned at a local pro lab. I'll put the scans (have to think about what size is best) on an ftp server ( or the files section if that is practical ) for anyone to download. Anyone who wants to can create their best match to the B&W image from the colour image and upload the result for the rest of us to review. Anyone who is interested can then see the difference in the image files and also, by downloading and printing the two files, can see for themselves what the difference in the print is. For the second question we could do this: I will circulate some CD-R's and the tri-x negative from the first test to anyone who is willing to use their scanner to produce the best full range 16 bit greyscale scan that they can. They send the file back to me or upload the file to an ftp server. Anyone who is interested can download the results and make their own comparisons on screen and from their own printer. There are lots of variables in making the scan but if we set people the task of making what they felt was the best scan they could make with some agreed level of white and black point clipping I think the results would be meaningful. To serve my own interests I'd like to circulate a 4x5 negative (this will help me decide whether to upgrade my scanner). Ideally we would have someone volunteer a Leaf 45 ( I think there is at least two of these on the list), an Epson 2450 and or a 3200, and perhaps a drum scan although we should have one from the first test. Anyone interested in directly comparing their scanner could, of course, volunteer as well. I don't have any digital cameras so I can't offer to add that to the comparisons in the first test. However if there was someone in the Pacific Northwest (Vancouver or Seattle) who was will to bring their good quality digital capture device along we could really make things interesting. Is this of interest to anyone else? -- Kevin Gulstene