Does anyone have some experience to share regarding how to expose this film with a deep red filter? I'm planning to use a Hoya R72 filter, and meter before installing the filter. I'm estimating that I should be using an effective film speed of about 6 -12 ISO. Will be daylight exposure, 35mm. As it will be my first experience (experiment?) with this film, I do plan to bracket +/- 2 stops. Development plan is Rodinal 1:25, 8-9 minutes. Advice???