Hi Shel, I think you have it exactly right. My only reservation might be number 4. Perhaps it would be better to have a top pro lab produce the best possible print from each format. That might very well be a wet print from the negative and an inkjet print from the digital file. But I'm not sure. I think I would ask a photofinishing expert.
Wheatfield. What say you? > Not being a "testing maven" I respect all comments and positions. They all > seem to have merit. As noted, I may do a similar test at some point. What > suggestions are there from the list as to the most useful testing > parameters? Here's what I was thinking: > > 1) Using lenses that provide about the same equivalent focal length; > > 2) Using ISO speeds that are comparable between film and the digi; > > 3) Using print film instead of slide since the main reason for the test is > to compare the latitude of digi v film; > > 4) Getting prints made to the same size using the same enlarging system, > probably something like a Fuji Frontier. > > Since the main reason for the test is #3, how important are #1, #2, and > #4. My thoughts are that as long as I'm comparing the two systems for #3, > it would be just as easy to look at other aspects for comparison as well. > > Shel > > > > [Original Message] > > From: Steve Jolly <[EMAIL PROTECTED]> > > > > Your desire to use the same magnification for each image is > understandable, > > > but perhaps it would have been a better test to use the same size prints > > > for the test. Most people ask for a print of a certain size, not of a > > > certain magnification, and the results may have been truer to real world > > > issues. > > > > > > Also, might it not have been worthwhile to use lenses that produce > > > approximately the same image size, such as the 20mm for the digi and, > what, > > > 35mm or so for the film camera? I don't know the answer to that since > the > > > introduction of different lenses could effect the test, but then again, > > > it's said that digital "sees" things differently through a given lens > than > > > film does, so maybe it's a non issue. What do the experts say? > > > > I think that what Gianfranco did was a better technical comparison of > > sensor technologies; a test following your suggestions would be better > > as a comparison between film and digital *systems* in the real world. > > Both kinds of test are valuable. > > > > S > >
