Red Filter an absolute requirement for Ilford SFX 200 InfraRed?
I've just shot a roll of SFX200 and developed it with DD-X for 10:00 @20 deg (well, it was 20 deg when I poured the liquid in! God knows what it's temperature got up to by the tenth minute!)
Anyway, the film is drying up as I type but just a mere inspection of the negative shows me lots of black areas, they all look pretty dense. What went wrong there?
Also, I underrated the film to ASA 160. On top of that I didn't use any filtration. Is it compulsory to put on a normal red filter when shooting with SFX200?