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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 predilux@wid.la Thanks for reading this post and we hope you thought it was interesting, Georges Harnack for the Predilux Team

Hi folks! Long time, no see! So I've had my Canon Auto-Zoom 518 for about a year and a half now. It's an awesome camera, but for as long as I've had it, the light-meter has been consistently finicky. It requires batteries that no longer exist (PX625), so I have to resort to obscure substitutes (Wein Cells 1.35V Mercury Replacement Battery) that often stop working, such and such. For the past few months, I was using somewhat of a hack with a random alkaline battery and the Wein Cell, which was working until I left my camera in the cold for a bit too long. Even now, when I bought the correct Wein Cells, the light meter refuses to work. There is no indication of the light meter being powered or anything. I've tried turning it off and on, and everything that has worked in the past. I'm wondering now a few things: Should I be using different batteries? Has the cold done irreparable damage to the light meter? Do I need a new camera? I really love the camera. It has a crisp image and isn't too bulky. (Here is a project I shot on it) I'm not too quick to drop it for another model. However, if I had to, which cameras have more reliable light meters and aren't too expensive? (I have a budget of $100-$125) Is there anything that comes to mind? Thanks so much as always, Aaron Razi Baseman

Hi, I'm currently saving up to purchase a light meter but until then would an external monitor with false color reading be a suitable substitute? Thanks

After 1/8000th shutter are the cine values, from 8-128 fps. In a video i saw the values from 8, 12, 16, 18, 24 and there it stopped for the demonstration purpose. I wonder is there 25 fps? If not being trouble, what are the consecutive fps? Thanks Igor

pre-owned, in perfect working condition with no signs of wear. comes with original case.

I'm selling this Sekonic light meter for $75. Ebay Listing: http://www.ebay.com/itm/171360860979 DOES NOT COME WITH THE DOME. A multi-function digital ambient flash meter for the working pro on location or in the studio. Features 1/10 step digital and 1/2 step analog readout, multi-directional dual pivot light receptor, memory functions, and rubberized covering. Optional 5° spot and ground glass reading receptor. This light meter is in good working condition and comes with the strap and pouch. *This light meter does not come with the white dome but does come with the lumidisc. The dome is no longer available for purchase and there is no alternative replacement. Also comes with: Sekonic Lumidisc for L-718 Exposure Meter #401-828 DOES NOT COME WITH THE DOME.

Hey there, having a hard time deciding on one of these spot meters. Would love to hear your thoughts/experiences as I'm planning to get my first SM, using it on a few upcoming film projects. Thanks for your advice!

Hey guys, just wondering what do you think about sekonic l-478d?