Detection of Dichroic Glass or Coating at Lens, Common Technology for Vintage Lenses
My quest continues to understand and make it stand the technology of 30s to 70s European and American best lenses.
In time , I thought high low aberration per lens element in an objective plays as an unsharp masking filter.
Second idea came later ,
- I have an Kodak Ektar 111mm f:1.5 Fluroride lens and when I look to my mother , it looks as someone claimed as kodachrome or leica look. All the skin looks like shiny polyurethane lacquer coated plastic , everything is round , flawless and relief like , all skin wrinkles are deeper and shadows are deeper.
It makes a dry skin looks like oil coated. That strong effect.
- I watched a bolex movie and swiss made yvar lens was UNBELIEVABLE. All the colors were so strong and elegant and skin looks like a inflated baloon , not less. The face corners , cheeks , nose end was 3 tone brighter and it looks like it was glowing.
I learned that dichroic glasses and coatings cut some wavelenghts and saturates the image
I thought that dichroic technology would be the responsiple of all above experiments.
I want to learn what is the way of detection of dichroic glasses and coatings at a objective ? How they would relieve themselves ? What is the technology to detect and analysis them ?