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Hi, We are two technicians working in the film industry in France (a grip guy and a gaffer) and we just discovered this very interesting forum. We particularly noticed that gaffers and cinematographers were asking questions about light output and what aperture is obtained at a certain distance. It happens that with the help of two IT engineers we developed an iOS app responding to this question about 2 years ago. First and for all, we’re not going to post messages everywhere on this forum to sell our app nor are we going to pollute your threads to gain in visibility. We just think some of you might be interested in what we created and since we’re a really small team working on off-time we can’t do any real advertising, so you probably wouldn’t know our app existed. Our app is called Predilux (for pre-diction and lux for light) and predicts the exposure as measured by a light meter, by choosing a light source and a distance. Or inversely predicts the distance to the light source by specifying the exposure. Predilux takes into account: Camera settings (FPS, ISO, Shutter angle) Source settings (Focalisation, Lenses, Grids, Dimmer, CCT, etc) Gels mounted on or close to the source (All ROSCO e-colour+ range) All results have been experimentally verified by us with a light meter in rental houses. For each source setting we made several measurements at different distances and this took a lot of time. So Predilux does not rely on constructor’s data, but on real data reflecting the state of the equipment as found in rental houses. Our data sometimes differs from the constructor’s data. Here is a quasi exhaustive list of the sources measured and included in the Predilux (12/2019) : Tungsten ARRI 150, 300 Plus, 1K Plus, 5K Fresnel, T10, T12, Rubylight (MFL lamps) Briese 77, 100, 140, 180 with lampes ranging from 650 W to 2K Mole Richardson Softlite 1K, MaxiBrut 16 (MFL lamps) Openfaces such as Redhead, Blonde, Desisti Renoir 5kW and LTM Cyclight 2K ETC Source 4, Dedolight, Zaplight, CMC 20K, etc. HMI ARRI AS 575, 1200, 4K, 6K, 12K, Arri M18, M40, M90, ArriMAX 12K & 18K K5600 JokerBug 200, 400, 800, Alpha 1600, 4K, 9K, 18K AFM 575, 1200, LTM Cinepar 2.5K Fluorescent KinoFlo 2ft, 4ft & 6ft LED ARRI S30, S60, S120, S360 KinoFlo Celeb 200, 250, 400, 450, 850 DMG SL1, SL1 mini, SL1 Switch, MaxiSwitch Mole Richardson Tweenie, Senior, Tener Aladdin Biflex 1x1, 1x2, Flexlite 1x4, 350 Dedolight bi90, Cineroid LMD400, Velvet V1 Balloon Airstar Gaffair 1200, Elipse 4000, PAD 9ft x 9ft, Tube 16K If any of the administrators of this forum wish to try out our app, we would be happy to give them one or several free life-time activation codes. For all the other users, our app is available on the Apple Store (). An Android release is planned. If you have questions or requests, don’t hesitate to contact us at this address firstname.lastname@example.org Thanks for reading this post and we hope you thought it was interesting, Georges Harnack for the Predilux Team
Hi again everyone. I'm trying to recreate this look in the image provided below. Its's only this 1 shot needed. How do you reckon they did this and what lens do you think it was on? (reference image is at 1:26 minute: I have done my own test using my directors viewfinder app (red helium 8k lens on a 32mm Master Prime). Using a DOF calculator I recorded the following info: *NOTE: These results are all factored off an F16 F-stop (results will vary if we have to open up obviously but I hope this gives everyone an idea). · 32mm lens - 14 cm from back of box is where focus will start (this area is OUT of focus) - 51 cm in distance from the red tape measurer to the bottle centre of (this is all IN focus) - 35 cm from bottle to the camera lens is out of focus (35cm is the close focus distance of the lens – and this area is OUT of focus) - ***27cm height will be seen at the back of box – so it is important the height is higher than this so we don’t see the top layer of the box / roof (30cm is acceptable but you can go a bit higher if you want) Do these results look accurate to you? Also im relying on that 51cm to be in clear focus and will have to light this pretty damn brightly to get there. Any thoughts on this. Thanks.
I'm currently looking in to buying a used Sniper Mkii and just wanted to know other 1st Assistant Camerapersons' opinion of working with it in the field. I haven't been using anything similar to the Sniper. As of now estimating, hard tape, and a laser measurer have been my ways of getting measurements, but to have a unit such as this could be a great asset if caught in bind. I've had my eye on a few units since May 2013, but I spent a while to research the item. I can't seem to find an answer to one question. Are the display cable, power cable, and accessories(ie. beam splitters and smoke iris) universal from the Mk iii to the Mk ii? I know a lot of technical specs to the Sniper Mk ii, but I'm more interested in fellow ACs' experiences with it. I'm very weary about purchasing an item I haven't tested in the field, or at least seen in action in the field in person so really any advice on working with this unit, what to look out for, or what to get to utilize this to the fullest would be greatly appreciated. Thanks. - Ian