So a suggestion. Make a test sheet covered with some black and white mixed
images. Small crosses, parallel lines, yin-yang symbols or whatever you
want. Maybe throw in some others in various grey contrasts. Make a
negative. Then tile the negative with the gel samples and print through
them. You should be alble to get a bunch of data all at once about the
contrast effect of overall colored filtration. You will probably need to
make several different exposures to get the images under the dark gels
dense enough to use.
If anyone wants one of these things in order to try this experiment, or
something else that will give the same data, and report to the list,
contact me off list and I'll send some out. I can't cover all possible
requests so I'll have to establish some priority based on the phases of the
moon, the state of the tides, the taste of my morining coffee when the
requests show up and whether you spell it lens or lense.
If you live in or near a city large enough to have a lighting service
company give them a call. These sample books are reissued every year and
the old ones dumped. I'd bet they have boxes of them stuck away somewhere
which they would likely give to you. Saves some postage and spreads the
wealth.
Another freebie from academia for the general benefit of humanity. Get them
before we decide to protect the idea under intellectual property and
copyright litigation. <insert 25 pages of general hissy fit and spleen
venting here>
Enjoy,
Eugene Robkin
ps If you successfully download Art's images drop me a note off list. I'd
like to report back to my system admins that the site is being used without
asking him to take the time to monitor the usages. He's got enough to do.