There's another reason why ''not'' to use a tube light close to your subject as a rim light, and it's when the subject will be moving and getting closer to the light, because of the ''Inverse Square Law''. For instance, if you are shooting a person sitting at the table, and you want to light it from above, simulating the ceiling light. If you use a tube light (or any low intensity light) just out of frame, it will work if the talent stays still, but if he gets just a few inches closer to the light source.. the light intensity will increase dramatically, and it will show that the light is very close and not on the ceiling. Same thing can happen if he moves away from the light source.. the intensity might decrease dramatically. In any case where there are movements and nobody to move the light so it stays a the same distance from the subject... it's better to have a stronger light positionned further away, to have more room before the light intensity gets ''unstable''. IMO, it's one of the most complicated factor about gaffing for low/zero budget short films.. especially in tight spaces, like an apartment. Using the proper light, at the proper distance, with the proper diffuser size to get the desired light quality and still get enough room to move around without getting hit by the Inverse Square Law.
Agreed! It also makes it easier to frame or re-frame the shot without having to worry about showing the rim light which is usually right outside of frame.
@@Dano-Media Exactly! You just have to adjust the brightness and size of diffusion (if any) accordingly, considering that the further away the light source, the bigger the diffuser has to be to maintain the same softness, and vive versa.
Good insight into this light dude. Can I ask were you filming these at higher iso on your fx3 or just native? (To get an idea of how bright they are) Can I also ask what boom arm you are using?
Thank you! On this shot 3:43: I was at iso 800, 1/48, f1.8, + 4 stops of ND. It was bright because it was directly over my head. If it was further away, I wouldn't have had to ND. This is the boom arm I'm using: www.amazon.ca/gp/product/B0B4S8YN49/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 It doesn't feel very sturdy though when using it with a bigger COB + Softbox, if I had to choose again I'd probably get an avenger boom arm for potentially heavier setups.
Didn't get a chance to try that light unfortunately, but the fan noise on this has been pretty manageable for me so far. It's not perfect but isn't an issue for all my work so far.
Those boom stands as well as the black ones to fold are all from one giant (north korean slave worker falun gong organ harvestin) chinese factory with different brand labels and prices attached differing up to 5 fold for Manfrotto or 1 fold for Falcon. Neewer and many others overpriced. It is all one and exact the same stand. Just my cents.
