Eight More Cadobo Cam Exposure Tests

Testing Foma MG Classic with my homemade lumen camera.


sonny rosenberg

4/20/20231 min read

A few days ago I did several Cadobo cam tests with my old standbye lumen camera paper, Arista Edu Ultra grade 3, wherein I finally figured out that shorter exposures worked much better with this camera. I wasn't completely satisfied though, as the contrast I was getting with those exposures, while an improvement from my first Cadobo tests, wasn't as good as I hoped it could be.

Today I decided to try my alternate paper, Foma MG Classic 320. These were all shorter exposures, the longest being 2 hours and the shortest 45 minutes. I also tried wetting the paper as opposed to the dry exposures. I quickly figured out that misting MG classic isn't the way to go as it causes spotting of the paper, while not entirely unpleasant, isn't what I was going for.

Dipping the paper in hot water as I used to do with the Lumenbox gave some interesting results. I also found it interesting that especially with the wet MG Classic, the photos needed almost no color curve tweaking (other than inversion of course) to get the colors and contrast that I found interesting.

This paper certainly has a different palette than the Arista paper, tending more towards greens and yellows, which is fine with me. I wonder if that has to do with the MG being a multi-grade paper?

In any case, I've divided the photos into two galleries, the first (top) gallery consists of shots with undampened MG Classic. The shortest exposures (of one hour)on the left going to longest (1 hour 50 minutes) on the right.

For the exposures below the MG Classic was dampened to various degrees. The shortest expsoure of 45 minutes (on the far left) was dipped in hot water for about 20 seconds. The longest exposure on the right was only misted with water, while the shots between were quickly dipped in hot water.

At this point I think I'm most interested in the briefly dipped in hot water photos. I may try super quick dips in varying temps of water to see if that has any effect. I'm also wondering if adding a tiny drop of Photo-Flo to the water might produce a thinner layer of liquid on the film, thus giving a result between the fully dry and fully wet papers? The experiments continue!