Don - thanks for the lowdown -- makes me want to play - but I don't have access to the hardware necessary...
I was curious about the subject matter as I used to describe the rock sections in class by what they looked like to me in the art world... I think I liked your very first image (strong reds and greens with a leafy look) the best. But they are all fascinating. How come you didn't chose one to put in this month's PUG? They all nicely fit the theme. ann Don Williams wrote: > > Ann Sanfedele wrote: > > Don Williams wrote: > > > >> Hi all, > >> > >> Someone on the list approved of my posting links to microscope pictures. > >> > >> > >> > > That would have been me, probably > > > > I think we discussed the aesthetics of bi-refringence under > > crossed Nichols :) > > > > I'm enjoying these Don, but wish they were titled with the > > substance you were > > photographing. Are any of these mineral thin sections or > > all organic things? > > > > It has been over 25 years since I took microscopic > > petrography. I don't know > > what I'm looking at here :) > > > > Best, > > ann > > > > > > > > Hi Ann, > > These images are not the slightest bit useful from a scientific > viewpoint. Most are of subliming crystals, none are sections and almost > all are mixtures. The big, fairly good looking orthogonal crystals, are > those of the components of Coldrex. The grid like structures are > naphthalene as are some of those that look like paintings. There are > some pictures of Potassium Ferricyanide. There are a few iodides in > there as well. The fields for picture taking are selected for their > colour and interesting squiggles. Double numbers with hyphens are stacks > of images combined with CombZ or Helicon Focus. All these were made from > supersaturated solutions allowed to crystallize under the cover slip. > All were taken with the *ist D although there were some made on film in > the earlier gallery. I used crossed polarizers and a Zeiss ROT plate as > well as homemade retardation plates of unknown value -- perhaps about > 1/4 to 1/2 lambda. The polarizer and the plates were rotated to get the > most pleasing colours. > > Don W > -- > > Dr E D F Williams > > www.kolumbus.fi/mimosa/ > personal.inet.fi/cool/don.williams/ > 41660 TOIVAKKA Finland - +358400706616
