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Halogen Spotlight for after sunset beach shots....
So, I am interested in shooting the shadows on the sand...even when I
have run out of time and the sun has gone down. A Flash won't let me pick out angles...but my new 12,000,000 candle rechargeable Halogen Spotlight for 30$ will give me an hour or so of "light"! Now, what to do about that flashlight style center bright spot? How do I defuse it and still get nice sharp 'sunset style' shadows? I'll be using a D50 18-55, until I start buying primes... thanks - t. |
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Halogen Spotlight for after sunset beach shots....
So, I am interested in shooting the shadows on the sand...even when I have run out of time and the sun has gone down. A Flash won't let me pick out angles...but my new 12,000,000 candle rechargeable Halogen Spotlight for 30$ will give me an hour or so of "light"! Now, what to do about that flashlight style center bright spot? How do I defuse it and still get nice sharp 'sunset style' shadows? get a video camera light. try this, get one of those fresnel magnifying plastic sheets, used instead of reading glasses, some are book sized. (but they might not be, uh, fire proof.) maybe the lens off an old spot light might work. find an old enlarger and salvage the condenser lenses and see if they are any help. why won't a flash let you pick out angles? Oh, cause its a flash, well use your flashlight to find the angle and put your flash there. |
#3
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Halogen Spotlight for after sunset beach shots....
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#4
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Halogen Spotlight for after sunset beach shots....
Andrew Haley wrote:
wrote: Sadly, I think you will find that once you diffuse those '12M candles', they won't give you much light at all.. Well, let's see. A wax candle generates a nominal 12.5 lumens, and a tungsten halogen bulb has a luminous efficacy of about 25 lumens/watt. So, to match 12 million candles with tungsten you'd need 12*10^6 * (12.5/25) About three megawatts, in other words. Duh. Six megawatts. Andrew. |
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Halogen Spotlight for after sunset beach shots....
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#6
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Halogen Spotlight for after sunset beach shots....
"Andrew Haley" wrote in message ... wrote: Sadly, I think you will find that once you diffuse those '12M candles', they won't give you much light at all.. Well, let's see. A wax candle generates a nominal 12.5 lumens, and a tungsten halogen bulb has a luminous efficacy of about 25 lumens/watt. So, to match 12 million candles with tungsten you'd need 12*10^6 * (12.5/25) About three megawatts, in other words. I wonder how big that spotlight is... Andrew. Candlepowper is a bit like PMPO ratings for speakers. Great for advertising, useless for practical measurements which you've just demonstrated. Assuming that it's powered by a Sealed Lead Acid battery, the heaviest that you want to carry would be about 7.5AH 12v. Lets be really generous and multiply that by 4 to give 30AH. P = V * I so 3000000 / 12 = 250000 Amps. 30AH / 250000A = 0.432seconds. I would try to keep the shutter speed faster than 1/4 of a sec ;-) |
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Halogen Spotlight for after sunset beach shots....
Tom wrote:
What would be the pro or pro-sumer/ebay choice for an hour of portable lighting useful for taking stills, with or without a tripod, through a D50 18-55 3.5 and slower, and, low noise (iso closer to 200 then 1600), as I would like to blow up the good ones. Strobes powered by battery packs. If the "right choice" is, oh 10x in cost over my $30 spend, No, you're still in the wrong order of magnitude on that. It would be thousands, and probably not just one or two. -- Jeremy | |
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Halogen Spotlight for after sunset beach shots....
P = V * I so 3000000 / 12 = 250000 Amps.
250,000 Amps, hey...? I'd suggest you would probably want something fairly solid in the way of wiring for that setup, and stand back when you flick the switch.. wooohooo! (O: A video light is probably the best solution you've been offered. Or the other one, to use a flashlight to get the direction, and then use flash. But a lot depends on what sort of area you need to evenly illuminate..? |
#9
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Halogen Spotlight for after sunset beach shots....
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