Vivitar Chromo Blend filters

[railwayman3]

I've been given a "Red" version of the above filter, and I see that there are also "Blue/yellow" and "Red/Blue" versions.

Anyone know how they work and how to use them ?

 

[CMoore]

I've been given a "Red" version of the above filter, and I see that there are also "Blue/yellow" and "Red/Blue" versions.

Anyone know how they work and how to use them ?

Are those the ones that have to be used with a Polarizer.?

 

[AgX]

Are those the ones that have to be used with a Polarizer.?

Such were offered under different brands. We had threads on these, but no explanation of their working so far.

 

[Paul Howell]

NYT, 1978 article mentions, to be used with color film to create unnatural colors,

https://www.nytimes.com/1978/12/03/...de-to-filters-and-other-lens-attachments.html

 

[CMoore]

FWIW..............There might be a Typo in the Thread Title.
I think it is Chroma Filter and not Chromo.?
I might be wrong

 

[reddesert]

It's "cromo blend" for the Vivitars. I have one that came in a lot of stuff but don't use special effect filters much, so I haven't played with it enough to be familiar with it.

This link is fairly informative: http://www.the-ultraphot-shop.org.uk/bicolor.htm According to the author, the bicolor filters have a dichroic that passes two colors of light (such as red and blue) with different linear polarizations. (The light that isn't red or blue may be filtered out.) If you add a linear polarizer, then you can vary the amount of red vs blue light. If some areas of your image are already polarized, like reflections or the sky, then they may get a different tint from the rest of your image.

Here's an example where someone used such a filter to make the foreground reddish and the sky bluish: https://www.flickr.com/groups/97999421@N00/discuss/72157600087149541/ (although I'm not 100% sure if he was using a cromo blend or a half-and-half filter). Anyway, it's very Batman, but it's easy to get results even more extreme / less tasteful.

 

[CMoore]

Yeah, that makes sense.
The Vivitar product name.

My only experience with any of this was from my high school photo teacher.
He showed us a trade film... i think it was Kodak... in the late 1970's.
I am pretty sure it was Chroma Filters and there was a polarizer involved.
The Vivitar product might be a different thing all together.
We only saw the film, we never had access to the filters.
We only shot black and white anyway.