airfrogusmc
Veteran
Have you done any comparison between the Heliopan digital and a b+w mrc? It's my understanding that the digital branded heliopan also offers UV\IR filtration. Also, where does one find this filter? I can only find regular heliopan's that do not mention the digital moniker.
I think Cal did some research on it and found the Heliopan Digital Yellow to be right in line with the Mono sensor and I found it at B&H.
Side of the filter reads heliopan Digital ES 46 2X -1
I would call B&H, If they don't have it in stock they might be able to order it for you.