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DS Williams

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  1. Any more replies would be much appreciated! Have any of you encountered a situation like this one?
  2. David, I GREATLY appreciate your reply, as you are a wealth of experience and knowledge. Anyways, will placing an industrial flouro tube in a kino fixture change the color output, frequency ect? As kino balasts have a high and low output mode, i assume they are overdriving the globes? We may just end up balancing to the interior lights ..but that still leaves the windows to have a bluish cast. we may just resolve that with a power window in post production. And i an afraid that turning off the overhead lights will leave me without enough ambient light inside the office, and i have only rented kinos total because of our budgetary restraints.
  3. Hello everyone! I would really appreciate some opinions on this. I am shooting a commercial for an insurance company soon. The commercial takes place entirely in a large office. I have attached a picture. The office contains a series of overhead 4100k Fluorescent t8 globes, with a CRI of 75. the windows are slightly tinted, with a small bit of green cast. Now obviously if I had the money, I'd replace the overhead fixtures with Kino k55 globes, which I assume would work fine, even if the ballasts are magnetic (am i mistaken?) We do not have the money for a pre-rigging day to replace all the globes, so I'd decided to just either gel my kino fixtures, or basically build "ghetto" flos out of home depot fixtures using their overhead globes. From what i gather, this will create an overall consistent color bias across the frame that can be timed out later, although the windows would go bluish. Is there any other way to go about this? Suggestions would be welcome. should i: 1.) Use 5500k Kino flos for all the foreground action to allow for great skintone? this will allow the windows to be correctly color balanced and let the background go greenish-warm.. 2.) put their 4100k industrial phillips tubes into my kino flo fixtures and white balance to that
  4. Any comments are appreciated!
  5. Hey guys! Quick and dirty little music video I DPed/Gaffed with the c300 and Optefex filters May not be everyone's cup of tea but I just want to highlight how well the 300 footage graded. I decided to shoot in C-Log and was impressed with how far I could stretch tones and levels, even in 8 bit YCbCr enjoy http://www.youtube.com/watch?v=552qF9i3TAU
  6. John, would you mind explaining/expanding upon this concept? I always thought CRI described the variety of wavelengths produced by a light source, as in it's relative purity and accuracy in illuminating colors... Wouldn't this matter more for analog sensors than the human visual system, since it has the ability to adapt to color casts ect? Sorry i'm still learning. This whole concept of CRI gets very confusing to me
  7. David I would just like to offer a massive THANK YOU. You don't even know how much of an inspiration as well as wealth of knowledge you are to a student DP like me.
  8. Greetings Cinematography community, I'm shooting a promo this week for a local school video program and they asked for this specific look As far as I can tell the majority of those shots are shot against muslin fabric with a strong backlight, maybe 2k or even 5k, couples with a frontal soft key, seeing as there are no shadows on the faces of the talent. I see a number of lens flares as well. Perhaps there is a small tweenie or inkie off camera purposefully shooting into the lens? It looks to me as if the key is a soft and toppy... there are minor shadows directly under their cheeks and jawline. I understand a large portion of this look could be created in post as well, including the lens flares, but I'd like to create it organically on set if possible. Anyone care to clarify or correct my assumptions? Any comments or recognitions would be of great help
  9. Thank you Chris for your informative and quick reply. I have one more simple question, do the larger entrance pupils in longer focal length lenses become a factor in their shallower depth of field? It seems logical that that would be the case...
  10. Hey guys So if the f number = focal length/aperature entrance pupil size and longer focal lengths like 100mm lenses have larger entrance pupils at f4 than shorter focal lengths have... then how do both lenses at f4 pass the same amount of light to the film stock/sensor?
  11. So you are all absolutely sure I've already damaged my lens? I wonder if ffinger oils damaging the lens coating is covered under panasonic's warranty Will lenspen remove finger oil? I'm purchasing one today.
  12. are you sure? This is scary. Because the oil won't come off when I use my micro fiber. I mean it's not COVERING the lens but yes, there is some sort of oil on it, obviously from my hand or something. How much damage will this do and will I see a drop in image quality? Lens care is just the most stressful thing.
  13. Hey guys. I heard a fellow DP say today that he cleans finger prints off his lenses as fast as he possibly can because he says they "damage and degrade the fragile outer element lens coating" Is there any truth to this? I've got some stubborn finger oil on my lens. I'm going to buy a LensPen tomorrow to get it off. Is that finger oil 'eating away' at my HVX200 lens?
  14. Thanks alot guys.. I'm just trying to plan my next course of action, as the last lens cleaner I used (bought at Best Buy) wiped the coating off my lens and smeared EVERYWHERE. The smears were impossible to get off. It was just a nightmare. And now than I used that MF cloth to remove my thumbprint, without any liquid, I seemed to have removed most of it but some haze remains in that area. So you're saying I should NOT use a lens pen, and actually use a lens cleaner, that contains rubbing alchohol? Remember I have an HPX170, if that makes a difference (same outter lens element as HVX200) In reality, do thumbprints, and fingerprints REALLY have a noticeable effect on footage? Do they lower the lens MTF in that region?
  15. Thanks a bunch guys. Hal, you made a goodpoint. The microfibercloth certainly has been used many times this month.And perhaps on that brand new glass, it took most of th smudge off but left some residue. Before I try lens cleaner (I've had many bad experiences with different lens cleaners) I am going to use a LensPen. Do any of you have experience with the Lenspen? Is it sufficient for smudges, finger prints, ect, WITHOUT lens cleaner? Thanks D
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