Frage von Norbert_BT:
Hello Forum,
I have an idea that I would like to build implemented as an experiment / prototype and / or that I need the help of experts,
are familiar with the Lichtsprektrum of LED's in reference to digital photography.
The idea seems to be not entirely new, but so far I have not found anything, what the appropriate performance / deployment flexibility.
It is a powerful studio panel light with LED's that one in a range of 2700K to 10,000 K can be freely adjusted. The size of the lamp may have about 500x500 mm and should be at every Kelvin value. 20 000 lumens provide. Industrial LUMITRONIX of available cluster / boards that you can equip and Free connection. This same provider promises on his site a power of 100 000 lm per sqm.
First and foremost I am concerned the application for taking pictures in the studio.
Current is sufficiently available and therefore is synonymous with the necessary cooling is no problem.
PWM schemes are due to the clock frequency is less in question.
According to the regulation of sieved KSQ is recommended.
As I recently here
http://www.ledhilfe.de/viewtopic.php?f=34&t=11714
've learned, there are LEDs in 2700K and 10,000 K.
My question is based on the light spectrum and therefore it,
which LED's can I use for this application?
Best regards
Norbert
Antwort von tommyb:
How is it with micro shadows?
Antwort von tommyb:
In the rest of your idea is not new:
http://tinyurl.com/3lujfgk
Depending on the angle of the LEDs (the experience, is usually between 100 and 120 °) would be your 20 000 lumens to 0.25 m in it (okay, the lamp is now somewhat smaller, but it is synonymous larger) ...
www.lumenrechner.de
Antwort von Norbert_BT:
@ Tommyb
Thanks for your tips.
Micro shade I wanted to eliminate my idea with a diffuser made of Plexiglas in front of the LED's.
From the 'two-tone LED light' I let me first send the complete technical data and if the are okay, I lend my part for a test.
However, it may well be that an optimized DIY is still worthwhile.
So if anyone here with the light spectrum of LED's familiar,
I would be grateful for an answer.
Antwort von carstenkurz:
I see little point in there - if at all, only with a chemical film because of nunmal regarding day-and artificial light is fixed.
The spectra of white LEDs at all with are similar to those of thermal radiators, with more Luminiszenzleuchtmitteln like 'neon', ESL, etc. The information on the color temperature for LEDs are therefore only 'looks like'.
You can experiment with something natural, but to build the sense that such a lamp in the required power reveals itself not me.
All electronic image sensors have blue weaknesses. Therefore, there is usually no reason to unnecessarily impair its performance with artificial light. Unless the scene was dominated by artificial light for other reasons and must be illuminated color-neutral addition. But for Gibts halogen. LED power then only against the background of lower operating temperatures and the dimming beseren sense. Those who believe, however, 20,000 lumen LED are 'cool' is mistaken. And PWM dimming is synonymous not without various interactions.
- Carsten
Antwort von Bernd E.:
... Powerful studio panel light with LED's that one in a range of 2700K to 10,000 K can be freely adjusted ... My question is based on the spectrum of light ... What do you plan seems in principle to the light to correspond to the Zylight under the model name
IS3
Antwort von Norbert_BT:
@ Carsten short
Thank you for your contribution.
I'm still synonymous not sure whether such an LED lamp brings. I promise me about it, but I would also like to test real time.
Useful applications come to mind and I do not want one enough (as unfortunately many German creators) get stuck in theory, but give me an image in practice. By American photographer I've seen a few examples that I found very appealing. They have, however, very many panels used in parallel. LED's have unquestionably synonymous serious disadvantages, but what the lighting does not have. Normal PWM dimming is not - is clear - see above.
@ Bernd E.
Zylight was not known to me - thanks for the hint.
Of course, synonymous of Zylight and Litepanels are a lot I can learn and I will soon test these products in the studio to see if I can save the tinkering. But apart of little descriptive, technical details, it seems to be that my personal preferences have been built of None firm. In this respect I would like to hold s.dem prototypes of my ideals.
Remains the question of the specialist who is familiar with the optical spectrum of LED's real.
Antwort von tommyb:
Honestly ... if you have such high expectations, then you should use other light sources. LEDs to give general information and you should then perhaps think about it again in 10 years if the LED-Manufacturer to produce, and then interested in becoming the possibilities are technically perfect LED.
You could however save to ever begin to buy are not.
