If I order Anomalous Dispersion Finder and A. Adams Blue, Painters Red Viewfinders

[Mustafa Umut Sarac]

I found Ansel Adams defends to use a blue viewfinder to see bw grades and painters uses red viewfinders for same purpose. Recently I learned some colored transparent plastic glass medium have anomalous dispersion and even there are AD optical glasses. If I order few few 3x2 inches size AD optical Glasses , would I see a huge difference at colors and grades ?

ps. For to get effect , may be I might buy high abbe numnber cut glass.

I have only experience with two glasses with lenses and I want to learn their bare cut flat pieces effect.


Umut

 

[Rudeofus]

You must certainly have seen lens filters before, therefore I would assume that you have seen the effect of flat pieces of coloured glass. I have no reason to believe that a blue (or red) view finder would have a different effect than a blue (or red) lens filter, except that you would have to remove the lens filter before the actual photo is taken.

Anomalous dispersion and related effects may be important for lenses, but barely so for flat pieces of glass.

 

[bernard_L]

What is your goal?? A viewing filter to simulate a monochrome image? In which case it's the absorption versus wavelength that matters. Anomalous refraction refers to the slope of the refractive index versus wavelength. Of course in a dielectric refraction and absorption are linked via the Kramers-Kronig relations.

But, to obtain a psuedo-monochrome viewing filter, there is no need for exotic anomalous dispersion glasses. Ordinary colored glass or gels should be enough.

 

[Mustafa Umut Sarac]

Hello, thank you for answers.

My goal is to force the color image with a expensive glass piece which I will use handheld. I think there are didymium glasses do that but I am after which how my leica lenses does that .

I am trying to make a lens like viewfinder which will change colors to vernmillon at dark and shows the grades and colors somehow different.

That is one of the biggest.desire I have.