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Kram
Joined: 06 Feb 2010
Posts: 1344
Location: Portland, OR
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 Posted: Tue Dec 03, 2013 8:02 pm Post subject: Cheap LED Ringlights, any good? |
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Kram wrote:
I saw this and it made me wonder as I've never used LED lights:
http://www.amazon.com/dp/B0096TO26E/ref=wl_it_dp_o_pC_nS_img?_encoding=UTF8&colid=36BJH2T6IZEO4&coliid=I20NIRY3W1KL0G |
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philslizzy
Joined: 07 Aug 2012
Posts: 4744
Location: Cheshire, England
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| Posted: Wed Dec 04, 2013 12:08 am Post subject: |
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philslizzy wrote:
I made one that does this but for £33 its neater, not to badly priced and possibly worth investing in. The only problem I have with ring flashes of any sort is that they are pretty useless if the front of your lens turns when focusing. My Nikon Kit lens does and my Sony does too.
This one may be ok as the cable seems to have a lot of slack in it.
you could go to www.instructables.com and learn how to make one.
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Kram
Joined: 06 Feb 2010
Posts: 1344
Location: Portland, OR
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| Posted: Wed Dec 04, 2013 12:27 am Post subject: |
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Kram wrote:
Phil, thanks but I am far from a mechanically minded- sadly.
The one I linked to runs on only two AA batteries, which I suspect wouldn't last long. Good point on rotating lenses. |
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norland
Joined: 10 Aug 2013
Posts: 165
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| Posted: Wed Dec 04, 2013 8:10 pm Post subject: |
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norland wrote:
If there was the lubricated frame of a polarising filter (minus its glass) between the LED ring and the filter thread of the lens, would the weight of cable/connector then keep the LED ring still while the end of the lens rotated to focus? |
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Lloydy
Joined: 02 Sep 2009
Posts: 7794
Location: Ironbridge. UK.
Expire: 2022-01-01
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| Posted: Wed Dec 04, 2013 9:15 pm Post subject: |
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Lloydy wrote:
| norland wrote: |
| If there was the lubricated frame of a polarising filter (minus its glass) between the LED ring and the filter thread of the lens, would the weight of cable/connector then keep the LED ring still while the end of the lens rotated to focus? |
Great idea, certainly worth trying.
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randreev
Joined: 12 Mar 2013
Posts: 22
Location: Sofia, Bulgaria
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| Posted: Wed Dec 04, 2013 10:17 pm Post subject: |
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randreev wrote:
norland, great idea is an understatement 
I might still that one off of you.
Otherwise the beef I have with ring LED lights is that even those from reputable companies come with somewhat poor CRI and those from less reputable/Chinese origin are even worse - color reproduction is a hit and miss, color temperatures doubtful and most cheaper models are not suitable for macro work as at very close distances they lit around the object not at it.
Almost forgot, if used as continuous light source they are a nightmare for closeups - people, especially children, squint uncontrollably - the LEDs are point like over bright and irritable and in flashlike mode metering is almost guesswork and I guess it is a proprietary one. There may be exception, but out of ten or so LED Lights and flashes none met my demands. |
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norland
Joined: 10 Aug 2013
Posts: 165
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| Posted: Wed Dec 11, 2013 4:19 am Post subject: |
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norland wrote:
Is there a significant improvement in the performance of multi-LED (double row?)
rings compared to those with fewer LEDs?
Btw, noticed that one listed on Amazon warned not to run it continuously for more than ten minutes
-- does that restriction apply to all such ring-lights? |
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Kram
Joined: 06 Feb 2010
Posts: 1344
Location: Portland, OR
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| Posted: Sat Dec 14, 2013 9:16 pm Post subject: |
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Kram wrote:
Happy I asked this as they seem not so good!
Thanks all! |
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ForenSeil
Joined: 15 Apr 2011
Posts: 2726
Location: Kiel, Germany.
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| Posted: Tue Dec 24, 2013 12:02 pm Post subject: |
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ForenSeil wrote:
I've once bought a similar and never used it since then.
LEDs are simply not bright enough for macros etc.
Maybe it's strong enough for potraits to produce ring effects in eyes but that's it.
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My camera: Sony A7+Zeiss Sonnar 55/1.8
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Most wanted: Samyang 24/1.4, Samyang 35/1.4, Nikon 200/2 ED
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visualopsins
Joined: 05 Mar 2009
Posts: 11022
Location: California
Expire: 2025-04-11
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| Posted: Tue Dec 24, 2013 5:01 pm Post subject: |
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visualopsins wrote:
| ForenSeil wrote: |
| LEDs are simply not bright enough |
Depends on how many, right? I have a machine vision 128-led ring light that should not be looked at directly. 
The add-on led rings for car headlights come in different diameters, can be nested: http://www.ebay.com/sch/i.html?_nkw=auto+ring+light+angel+eyes+led
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Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
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M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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claystevens
Joined: 11 Dec 2013
Posts: 6
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| Posted: Tue Dec 31, 2013 6:16 am Post subject: |
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claystevens wrote:
Never used a ring flash before. Considering about the replies, I don't need it any more. |
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