Before the rush

Before the rush
by evan-pak

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3
votes
3answers
247 views

What's the difference between LED and conventional lighting?

Is there any difference in LED lighting vs bulb lighting or any other lighting? Someone said that the LED light doesn't have the full spectrum of light. Is that a problem?
2
votes
2answers
143 views

Best way to photograph a LED wall (that has people in front of it)

The LED wall is interactive and the challenge is to make pictures that show both the wall and people interacting with it, without having the banding or moire effect, that often happens when taking ...
8
votes
1answer
150 views

What causes these bands in this macro photograph of a LED?

I took these photos of two LEDs: from my Nexus 5 phone. The distance between the lens and the LEDs was lens than 2 cms. The bands only appear when going up this close. Are these a software/...
2
votes
0answers
33 views

Is there a way to use my phone's dual LED flash with my NEX?

My phone has a dual LED flash that's supposed to match the color temperature of the scene, preventing color balance problems like this. I do a lot of night photography, and I use my NEX-5R. The NEX ...
1
vote
1answer
224 views

Can I leave a smartphone's LED flash on continuously before taking a photo?

When I take photos in the dark using my phone, I sometimes use the flash. However, the flash fires only at the instant of taking the photo, as with a traditional camera. This means that the preview is ...
0
votes
1answer
214 views

Where can I find light bars?

I am looking for light bars/tubes like the ones you can see here and here. I've googled it but have exclusively found LED lights but that's not what I want. Any ideas where I can find it ? Am not ...
0
votes
3answers
1k views

How can I amplify the light from a tiny white LED through a keyhole?

I am working currently on an art project. My target: I apply around 1000 lumen of light through a key hole of a door lock. The light is supposed to go through the key hole and the outcome of the ...
2
votes
2answers
168 views

How can I match adjustable-color artificial light temperature to ambient light?

I got some bi-color LEDs that allow me to control the temperature of the light they produce in the range 3200K-5600K. I will be using them in non-studio settings to complement available light. What ...
7
votes
3answers
2k views

How do I get accurate color when taking a photo of an LED?

When I'm taking a photo of a LED diode (turned on), it appears to be brighter than it should be and its color is false. For example, red diode looks pink. I have tried changing white balance or use ...
2
votes
5answers
393 views

Can I use my room's wall as a diffuser for a spot light?

Would like to record my face with a webcam on my desktop. I have a white wall with some light blue texture in front of my desk. Can I use that as a diffuser? I dont want to invest in a soft box or ...
2
votes
0answers
322 views

Filtering out RED light from a white LED source [closed]

We use red light for high speed videography. currently we use a Tungsten light source with a Red filter. Unfortunately, the Tungsten light source creates too much heat for our laboratory use. We ...
1
vote
0answers
48 views

Brightness of LED panel [duplicate]

If choosing a xenon flash, GN is a common reference. Come to led panel, there is lm/m and lux. This is a spec. of led panel: LM: 520/m LUX: 1m: 650, 2m:170, 3m:80 Whats EV equivalent of above ...
1
vote
4answers
600 views

Will LEDs work with a point & shoot camera for light booth digital photography?

I am planning on using multiple strips of LEDs to light up a 2 ft x 2 ft x 2 ft light booth for taking pictures of small items. LED output is Cool White 6500k. Digital camera is low cost 5 megapixel ...
16
votes
4answers
43k views

What is the purpose of a dual LED flash?

I see that some smartphones now have dual LED flash. What exactly is the purpose of a dual LED flash? Anything to do with brightness? What can a dual do that a single flash cannot? Would a triple LED ...