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LED lighting  Rating:  Rating
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Posted by jk: Sat Apr 14th, 2012 13:39 1st Post
LED lights seem like an obvious way to go but do they have enough power even when in banks of LEDs.


Does anyone have any experience of using these?



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Posted by Doug: Sat Apr 14th, 2012 15:03 2nd Post
link



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Posted by jk: Sat Apr 14th, 2012 15:27 3rd Post
Thanks Doug.
Very good article.



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Posted by richw: Sat Apr 14th, 2012 20:43 4th Post
Thanks, JK, Doug, I now have another book to add to my list!



Posted by Doug: Sun Apr 15th, 2012 02:43 5th Post
jk wrote:
Thanks Doug.
Very good article.

Yes, we should repost some of these better finds in blog form - might help to get the numbers up

btw, what about an iOS/Android forum with sub headings of tablet/phone photography tools and techniques along with other mobile stuff
For example, I wanted to mention the quite amazing Instant Heart Rate app, but other than off topic didn't know where to post



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Posted by jk: Sun Apr 15th, 2012 04:58 6th Post
Doug wrote:btw, what about an iOS/Android forum with sub headings of tablet/phone photography tools and techniques along with other mobile stuff
For example, I wanted to mention the quite amazing [url=http://itunes.apple.com/us/app/instant-heart-rate-by-azumio/id395042892?mt=8]Instant Heart Rate{/url] app, but other than off topic didn't know where to post

Put it in the Everything Else section.
:-)



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Posted by Iain: Sun Apr 15th, 2012 08:43 7th Post
jk wrote: LED lights seem like an obvious way to go but do they have enough power even when in banks of LEDs. Does anyone have any experience of using these? I bought a cheap one from the 7 day shop some time ago and was surprised how good it turned out to be and have used it quite a bit.

  http://www.7dayshop.com/catalog/product_info.php?cPath=777_1&products_id=109451



Posted by Ray Ninness: Sun Apr 15th, 2012 21:01 8th Post
I have flirted with grabbing one of those as a shadow filler, but just haven't found the one I want yet???

:waiting:




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Posted by amazing50: Mon Apr 16th, 2012 08:26 9th Post
Had good results with an LED ring light. It is switched on rather than flashing and runs on AA cells. I did some video of a band that had powerful multi color LED's. They introduced flicker into some of the shots, which was a pain to remove later. The flicker comes from the controllers that run on AC power. The battery powered portable video lights do not have this problem.



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Posted by Constable: Sun Apr 22nd, 2012 12:14 10th Post
I'm using a Manfrotto unit with 36 LEDs and a dimmer and camera mount.

it is Ok for fill lighting BUT (and this is a big but) you need to remember that it is not really white light. The spectrum is very different to sunlight. The colour temperature is all over the shop (no problem if you shoot RAW in principle). In practice, it is a problem because the colour temperature is hard to match because the spectrum shape is rather different to anything we are usually used to. In other words ... take care, colours may not be true.

For those who care about such things, the CIE chromaticity values are typically x = 0.27-0.3, y = 0.23 -0.28

Ed



Posted by jk: Sun Apr 22nd, 2012 17:23 11th Post
Constable wrote:
I'm using a Manfrotto unit with 36 LEDs and a dimmer and camera mount.

it is Ok for fill lighting BUT (and this is a big but) you need to remember that it is not really white light. The spectrum is very different to sunlight. The colour temperature is all over the shop (no problem if you shoot RAW in principle). In practice, it is a problem because the colour temperature is hard to match because the spectrum shape is rather different to anything we are usually used to. In other words ... take care, colours may not be true.

For those who care about such things, the CIE chromaticity values are typically x = 0.27-0.3, y = 0.23 -0.28

Ed

Useful to know so a bit bluey/purpley!
Are the fluctuations due to small voltage varitions or just between the different LEDs in the array?

Can it be corrected with a gel ?



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Posted by Eric: Mon Apr 23rd, 2012 05:39 12th Post
jk wrote: Constable wrote:
I'm using a Manfrotto unit with 36 LEDs and a dimmer and camera mount.

it is Ok for fill lighting BUT (and this is a big but) you need to remember that it is not really white light. The spectrum is very different to sunlight. The colour temperature is all over the shop (no problem if you shoot RAW in principle). In practice, it is a problem because the colour temperature is hard to match because the spectrum shape is rather different to anything we are usually used to. In other words ... take care, colours may not be true.

For those who care about such things, the CIE chromaticity values are typically x = 0.27-0.3, y = 0.23 -0.28

Ed

Useful to know so a bit bluey/purpley!
Are the fluctuations due to small voltage varitions or just between the different LEDs in the array?

Can it be corrected with a gel ?
Its the reduced CO2 in them! :rofl:



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