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Sigma Foveon and red filter

Sigma Foveon sensor and red filter do get along – here’s the proof. And they produce much more intense Aerochrome-like images.

These are some test shots with a classic Tiffen red filter on my Sigma SD1 Merrill. Custom white balance was set with a white card (without filter on). A circular polarizer was also attached.

The crucial part are the settings in Sigma Photo Pro (SPP). This software is very sensitive, minimal adjustments can make a huge difference. I’m convinced that other full spectrum/infrared styles are possible with the correct combination of filters, custom white balance and SPP settings.

Take a look. (You’ll notice that the filter is too small for my 77mm thread – I’m still searching for a 77mm red filter)

 
Red Filter

Red Filter

Red Filter

 
Here’s the comparison between the (filter-less) full spectrum method and my red filter method:

 
Foveon red filter

Foveon red filter

 
And here’s the most important thing: The settings in SPP. One way to get blue skies is to go into the “red” areas of your color matrix (notice the red dot). How to get there? Trying. I could do it by selecting very dark greenish or reddish areas. But so far, there’s no good, repeatable solution to this, unfortunately.

 
Red Filter

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