So my sister is getting married this april and I'm planning to shoot the whole thing. Aside from doing all the 35mm shooting I want to shoot some infrareds on the square. I have some experience (very modest) in shooting IR but advice is always welcome. The thing is, I have a Hoya R72 filter which is very good with the IR but also very dark and not helping with exposure. I did shoot some year ago few IRs (Efke IR), did the bracketing and all but my exposures were very long, some 10 secs or more. I did landscapes then so it wasn't a problem. Having people in the picture is a new challenge. Long story short, I would like only for my exposures to be above 1/60th of a second. Raising ISO is a must but I'm not sure of the results. The other problem is the focusing, Yashica doesn't have IR focus indicator so I have no idea what to do there. Thoughts? By the way, what is the difference between SFX 200 and other, "true" IR films? I've read somewhere "near infrared". What's the deal?