How To Build a Diffuser for the Light Meter LM-3000
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- čas přidán 7. 09. 2024
- In this short video, we'll show you how to build a simple diffuser for our Light Meter 3000.
It only requires a sheet of 80 g/m² (gsm) / 22lb white matte multi purpose printer paper and a bit of clear tape.
Check out this article to see how the Light Meter 3000 compares to physical light meters or lux meter apps: / the-best-lux-meter-app...
More info on our site: lightray.io/li...
Wooow very well thought out video. Impressed!
A suggestion: Provide a way to tell the app what weight paper you're using, so the app can adapt if 22lb paper isn't readily available. For example, I have a ream of 20lb paper, and I'd prefer using that than having to go out and find 22lb.
I want to add that find 22lb paper (in the US anyway) isn't easy. It's not impossible, but there aren't as many options as, say, 20 or 24lb. And, for example, at Amazon you have to search just right or it doesn't even give you 22lb as an option.
Hi Eric, we have written an FAQ article for our other app "Photone" about this topic. It also answers which paper you could use if your based in the US. growlightmeter.com/faq/#paper-diffuser Hope this helps :)
@@lightrayinnovation Wow... thanks for that speedy response! It looks like 20lb should work. That's what the recommended Wal-Mart paper is (though it's out of stock.) Thanks again!
For God so loved the world, that He gave His only begotten Son, that whoever believes in Him shall not perish, but have eternal life John 3:16.
@@mariomirquis9393
wrong vid and channel
Looks easy enough
For God so loved the world, that He gave His only begotten Son, that whoever believes in Him shall not perish, but have eternal life John 3:16.
@@mariomirquis9393irrelevant
What is the cost for the app? I see there is a "Free trial to use for some time," and then you 'buy' a battery at $5.99. Is this a one-time purchase for the app? I really wish app stores had a more clear purchase price. I feel like I have to dig to see if there is a subscription, additional features, etc. Thank you in advance for information!
Hi Stacy, it's exactly like you've stated. You may try the app for free for some time. If you then like the app and make good use out of it, you'll need to make a one-time purchase (no subscription) for the unlimited battery. This will last as long as you use the same Apple-ID, even if you have different or new devices.
We've built it that way, so that you have the opportunity to try and use our app for free. This way you won't buy something, that you wouldn't want to use. Does that make sense to you?
For God so loved the world, that He gave His only begotten Son, that whoever believes in Him shall not perish, but have eternal life John 3:16.
Thank you
I’m about to use this in a video about desk monitor light bars. Any chance we could collab for a code so I can unlock the battery and show off the cool app! :)
Great app!
If using 70g paper (common in Europe), what calibration adjustment should I apply to get accurate results?
thanks!
Thx for the compliments. We found that 80 gsm ist the most commonly used paper weight and have thus chosen it as the default. When using a 70 gsm paper, your readings will be slightly too high. Unfortunately, there's no way to predict how much too high. I thus recommend choosing one of the calibration options listed here: growlightmeter.com/guides/how-to-calibrate-photone/
Cool
wow thank you
You're welcome :)
Can I use 70GSM paper? (A4 size printer paper)
You can, but the readings will be too high then. You can adjust this by using the calibration option in the menu. Unfortunately, I cannot tell you by how much you need to correct your reading. But if you have a trusted reference (e.g. another meter or lamp, you can calibrate accordingly). I hope that helps :)
There r various of paper thickness. How many grams of paper then
80 gsm. That's 80g/m2 or 22 lbs if you're in the US.
Does it affect the accuracy of the measurements?
Unless you're using a diffuser, you won't get accurate measurement. Choosing the right weight of paper is crucial to get correct absolute measurements. Using another type of paper will still get you linear relative measurements that you can compare with one another. If you want absolute measurements with another type of paper, you'll need to adjust your app in the calibration option in the manual. If you have more questions you can always reach out to contact@lightray.io and we're happy to help 😃
How to calibrate this then?
@randfee: the app comes already calibrated for your your device. So there's no need for a calibration. If you want to adjust the reading to another meter you own, you can do so in the calibration section of the main menu. Feel free to reach out to us if you have any further questions.
Why do I need this for the app?
Every light intensity meter requires a diffuser for an equal dispersion and thus accurate measurement of the incoming light.
Do we use a diffuser for color temp check on leds full spectrum?
No, the diffuser is required to properly disperse the light in front of the camera independent of the captured scenery so the illuminance can be measured accurately. I hope this helps! :)
@@lightrayinnovation OK i seen videos where they use diffuser for color temp checking.I wonder why.
@@mr.a1232 Interesting. Do you have a link to this video?
@@lightrayinnovation czcams.com/video/t0umUgrS_UE/video.html He says the diffuser give different readings when you angle the camera so he uses a diffuser on color temp check.
Was wondering to measure LCD computer monitors? I'm trying to accurately set color temp for day and night time gaming and work but also need to set lux 300-400? IM putting the lux meter up against the monitor and get 210 lux with brightness as 100%.
Tried it with different kinds of white papers and I get different readings for each. Which one is accurate?
You are right, using different types of paper introduces a bit of deviation between the measured values. We recommend to use this paper: www.walmart.com/ip/Pen-Gear-Copy-Paper-White-500-Sheets/487634010
You can also reach out to our support if you need further help on this.
@@lightrayinnovation Not everyone has access to a specific type of paper, like me who isnt in the US. I suggest to add a calibration feature using a known lux source like sunlight.
You may use white matt 80 gsm paper to build the diffuser. This weight is the de facto standard everywhere outside the US.
Taking the sun as a reference won't work as there are too many factors (time of day, time in year, composition of the atmosphere, clouds (some clouds you cannot see), etc. ) that would change this reference. Our app comes pre calibrated for every iOS device. Using a 80 gsm paper should suffice to get an accurate measurement.
How long is the free trial?
The app is free for as long you have "battery". The status is indicated by the little battery icon on the display. The battery will only decrease if you were measuring for some period of time. Once depleted you can "install the unlimited battery" which will give you life time access. You can also read this information by tapping the manual button in the lower left corner and then going to "FREE TRIAL". I hope this helps :)
It doesn’t work with the diffuser
Hi Liza, what doesn't work exactly? You reach out to us via email and we are happy to help you with any issues you may encounter: contact@lightray.io
Will the app be affected if the diffuser isn’t tight to the camera? I have a phone case with raised edges that will hold the paper strip about 1/8” away from the front camera.
Yes it will. If you want to use the app with the case, you can simply apply a piece of paper over the camera and use clear tape to attach it. The clear tape should not cover the camera.
For God so loved the world, that He gave His only begotten Son, that whoever believes in Him shall not perish, but have eternal life John 3:16.
@@mariomirquis9393yes but for the love of lumens why
”Bomb has been deffused counter-terrorists win”
☝️diffused 🤓
dude you said 1-2cm and you are american, the scandel
Did you just assume their gender? Very non woke of you. :0 😭