Christophe Collette

Thanks a lot David! This made it really clear!

Thank you very much for your generosity David, however I still have a question, I have a few hotel lamps in some shots, are these what you call AC discharge lamps? What are the "safe speeds" below 24 fps with such lamps? 18 fps is not one I believe... Would 20 be fine? Sorry for not being well informed, as I mentionned, I am a photogapher at the basis. And also, while I am at it, I overheard a shutter angle of 45 degree at 24 fps could also be problematic with AC 60hz discharge lamps. I know about the 2 stops compensation but is it true that different shutter angles can generate different flicker responses... Is there an easy rule for calculating flicker free speed based on the source?? Thank you very much!!! Christophe

Hi everyone, I am totally new to this forum, I am a young photographer from Montreal, I will be directing the photography for a music video next tuesday, this is not my first video but I am still unfamiliar with the flicker thing as I did not study cinematography. The video takes place in an hotel room, looks a lot like the Richard Ashcroft "song for the lovers" video, (http://www.youtube.com/watch?v=tyGg4b3Xl_I), in terms of lighting, just a little less moody. Lighting is a mix of Fresnels 300-650-1k, Open face 2K, kino flo 4x4 and 2x4 and practicals (up to 4 in the frame at times) and a window gelled with 1/2 CTO. I think everything is 60HZ in the room, I am quite worried about safe speed for all this. The director wants to shoot part of video at 18fps, which I believe is not a safe speed at all shutter angles and shutter speeds. I would rather not touch the shutter, am a bit too green for this! Should I suggest shooting at 20FPS, or 15FPS? Is 24 FPS a safe speed also? I do not want to mess this up and it is quite hard to do any tests prior to shooting, I will go along with my ass. cam tomorrow to try to run some test alongside his but I don't think I'll get to view it prior to tuesday. I'd like an insight from the pros! I am shooting on the Arri Sr3. 500T Vision2 and transferring on either Quadra or Spirit. Also, should I worry a lot about the practicals, I intend in putting a 25W lightbulb, maybe painting one side black or taping it, the lamps are not bare bulbs, I will never see a bulb really but I don't want to kill all details over around the lamps. I do not have access to dimmers for the practicals. All suggestions are greatly appreciated, Sorry for this long post!! Thank you very very much! Christophe Collette www.christophecollette.com

Hi everyone, I am totally new to this forum, I am a young photographer from Montreal, I will be directing the photography for a music video next tuesday, this is not my first video but I am still unfamiliar with the flicker thing as I did not study cinematography. The video takes place in an hotel room, looks a lot like the Richard Ashcroft "song for the lovers" video, (http://www.youtube.com/watch?v=tyGg4b3Xl_I), in terms of lighting, just a little less moody. Lighting is a mix of Fresnels 300-650-1k, Open face 2K, kino flo 4x4 and 2x4 and practicals (up to 4 in the frame at times) and a window gelled with 1/2 CTO. I think everything is 60HZ in the room, I am quite worried about safe speed for all this. The director wants to shoot part of video at 18fps, which I believe is not a safe speed at all shutter angles and shutter speeds. I would rather not touch the shutter, am a bit too green for this! Should I suggest shooting at 20FPS, or 15FPS? Is 24 FPS a safe speed also? I do not want to mess this up and it is quite hard to do any tests prior to shooting, I will go along with my ass. cam tomorrow to try to run some test alongside his but I don't think I'll get to view it prior to tuesday. I'd like an insight from the pros! I am shooting on the Arri Sr3. 500T Vision2 and transferring on either Quadra or Spirit. Also, should I worry a lot about the practicals, I intend in putting a 25W lightbulb, maybe painting one side black or taping it, the lamps are not bare bulbs, I will never see a bulb really but I don't want to kill all details over around the lamps. I do not have access to dimmers for the practicals. All suggestions are greatly appreciated, Sorry for this long post!! Thank you very very much! Christophe Collette www.christophecollette.com