12-21-2014, 01:29 PM
To answer my own question, I kinda decided to get two filters roughly equivalent to Wratten 8 and 12 to 15. I quickly found Hoya make the former and ordered one of those to try. Getting the stronger filter proved more difficult until I found Tiffen do a 15, but they didn't call it Wratten so it never turned up in my early searches. That's also been ordered, along with an unspecified characteristic Cokin yellow.
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.