Response to Tip for Technical Pan users...

The 489 filter starts to darken colors in the spectra from ca 570 nm. At 650 nm the transmission is 70%, at 700 nm it's down to 50%, and at 750 nm it's only 25%. Looks good! This filter is a real schott glass, so it's better than the color correction filters from B+W that are gel filters laminated between glass.

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