Jonathan O'Neill

 Thanks David for this, your advice and time is appreciated ?

Hi I recently shot a film which we used a lot of candle light. I lit some studio scenes with tungsten so basically any 'daylight' in the scene was 3200k and the candle light was about 1800k (camera at 3200k). but we also shot some interior location scenes using natural daylight at 5600k with the candle light still 1800k (camera at 5600k).

What do you do about a constant like candle light, across a 5600k & 3200k scene?  Cheers!

Hi, do any brands of LED fixtures allow for the base kelvin in HSI mode to be adjustable? So at 0% saturated it could be 3200k and not 5600k which is all I can find currently. 

also, which brands have accurate lee gel settings? Once again with the option for that gel to be added to an adjustable base kelvin. 
 

cheers

Cool , thanks Gabriel

With a Falconeyes F7 Fold I want to get the equivalent of a Steel Green on a tungsten light , with camera at 3200k .

HSL mode you can get the hue in a ball park, then if you desaturate the LED it will ultimately go to about 5600k at 0% saturation....

RGB would just be ages of flicking through RGB combinations and thats if you have no plan to have a brightness option...

CCT mode is a separate set of LED emitters , with no option for + or – green.

Can someone recommend a different brand of RGB lighting , where you can set your base kelvin, e.g desaturate to 3200k? And accurate LEE filter options? and a CCT mode with + or - green? cheers

Hi thanks for the replies guys. Back to gels then I think! ?

Hi, I'm new to RGB lights. I'm testing a Falconeyes F7 fold.

How do I create the colour of a Lee Steel green gel on a tungsten lamp, using an RGB light?

The controls the RGB light has are :

R: 0-255 , G:0-255 , B:0-255

H: 0-360° , S: 0: 100 , I: 0-100%

I feel the HSI option would be best? as using RGB once you find the colour, brightness changes would need more calculations?

Does the info attached from the Lee filter website help at all? Does the 'X' or 'Y' correlate to anything?

Thanks in advance

5 hours ago, Stephen Sanchez said:

Correct.

For the soft source measurement, there's math involved that somebody will eventually nail down, whoever has the time and ability, in a simple enough form for others to use.

But even with hard light fixtures, we don't run a calculation involving the reflector, bulb type, and lens, to determine output. We look up the photometrics for that fixture or refer to our experience. A soft source is no different. Make your own measurement cheat book if it works for you.

When first starting out, I had set a 4x4 bounce card five feet from a Joker 400 and 800, and metered five feet from the illuminated card. That helped me for a while until I grew used to the intensities by feel. A friend told me another way was to "find your f11." Knowing where f11 is with any light gimmick, you will know that half that distance is f22 and double that distance is f5.6.

Nice one, thanks Stephen, a cheat book sounds like a good starting point ?

Cool thanks guys, I think it probably just comes from experience then. I'll try setting up an 8x8 and 2.5k and take various readings at different distances, and I reckon in theory adding a second 2.5k would just double those readings, another 2 x 2.5k would double again, and so on.

Hi, does anyone know of any 'smart dimmers' really just for practicals under 100w (I'm UK based) So a plug which goes between the power supply and the lights plug, which can allow the on/off function plus dimming of an incandescent bulb or a dimmable LED, via a remote app or handheld device. I'd be keen for it to be affordable. Cheers

Hi just wondering if anyone knows these workings? The reflective characteristics of the material would be required I believe, plus the size of the bounce. What are the rough calculations to work out the distance from the ultrabounce to get a reading of 67lux? (t2 , 25p , iso800)

Cheers

Jon

Great, thanks for this. Can chargers of a different brand to the battery damage the batteries? I’ve exclusively used the 4 way idx charger with my idx batteries, but bought a smaller hawkswood 2 way charger for its lightweight appeal. One of my batteries is no longer holding a charge. Just wondered if this is possibly related? 

Hi I have some v-lock battery which are starting to age. Is there a test which can be performed on them to find out their health? I'm a bit of a noobie to electronics... I have a multimeter which I know how to test their voltage, but thats not entirely helpful!

Thanks in advance.

Some of the Cine Reflect Lighting System panels give a linier bounced light, have you seen any materials which give this look?

See attached image

14 hours ago, Phil Rhodes said:

You can get the plastic-cored aluminium composite panel in a variety of finishes anyway

.

Ahh nice, looks a bit like silvered foamcore. I've also found quite a bit of "perspex mirror" and "Vinyl mirror rolls" which could be stuck on to foam core. I also might try applying a matt spray to achieve a different quality

1 hour ago, JD Hartman said:

Mylar, but being thin and flexible will have to be glued down to foamcore. Mirror like but not fragile  like glass.

Ahh thanks JD, I wasn't famililar with Mylar looks really useful

Hi Phil, thanks for the reply. Yeah it's not really to achieve a perfect throw as such, a bit of an inconstancy in the mirror would be fine. I need to create a moon glow onto a bed from a window in a cramped small room with no access to outside the window. I'm looking to boom the mirrored material to the window and bounce on a light (setup all inside the room). I’ve found some sticky back plastic mirror stuff on Ebay I’ll give a try

Hi, just wondering if anyone had any tips and tricks / alternatives they used for budget reflected material?

Generally I'll use in descending softness: unbleached muslin , polyboard , Ultrabounce , white foamcore , silver floor insulation board ,  Thermawrap Foil Wrap , lee 273 silver reflector etc

I'm kinda looking for more materials to add a bit of a DIY "cine reflect lighting system" Does anyone use any light weight mirror like materials?

Cheers

Hi, I'm trying to work out a compared database of photometrics for bebee lights, wendy, maxi-brutes, 18k's etc etc.

Is there a generic photometrics calculator / app / website, where you can key in the company supplied photometrics data of each light, then chose to see the reading at your desired distance?

Thanks a lot

Hi David, thanks a lot I'll give it a read

Great , thanks a lot AJ I'll check these out  ?

Yeah that's a good channel! I watch that too. I've got all my gels marked up with his method ?

Hi, I recently read "Film Lighting" by Kris Malkiewicz which I found very informative, especially the chapter on "lighting on location". David Mullen and other ASC DOP's and gaffers had a ton of tips and tricks to share.

Just wondering if anyone had more recommendations along the same lines books wise? I liked the first hand accounts from DOP's and the practical lighting related tips. I do read ASC magazine which also is a great resource.

Cheers

Jon

Hi, has anyone seen any collections/databases of gel combinations used by DP's for moonlight, sodium vapour, firelight, fluorescent etc etc, along with the camera kelvin settings?

Their go to favourites, or particular looks used on films?

Every so often there is mention of these in ASC magazine, which is interesting 

Cheers

thanks a lot