BrianO Offline Upload & Sell: Off
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BrianO wrote:
If the modeling light on my strobe was as bright as the sun, why would I need the strobe? I could just use the modeling lamp.
schristie11 wrote:
I think you misunderstand what I meant.
I was speaking of an AC modeling lamp or an AC flash strobe, they are two different things. I was not speaking of a AA battery powered hot shoe flash.
Yes, it was quite obvious that you were not talking about a hot-shoe flash. Very few of those have modeling lamps, although my Canon 580EX can pulse rapidly for short periods to act as a modeling lamp.
schristie11 wrote:
...There are modeling lamps on some strobes but they are an exception to what I was speaking of.
A 150 - 400 watt AC monolight that stays on all the time is pretty darn bright, esp to your camera.
Those aren't "modeling lights," those are continuous lights, also known as hot lights. Modeling lights are accessory lights on strobes that model the strobe's output so the photographer can see the effects of positioning, modifier usage, multi-strobe ratios, etc.
I've never heard the term "monolight" applied to hot lights because, well, virtually all hot lights are single-unit designs. "Monolight" is a term applied to strobes that have the power supply, capacitors, controls, and flash tube(s) -- and modeling lamp if so equipped -- in a single housing, as oppossed to standard strobe systems that are separate "pack and head" designs.
Lastly, although 150 - 400 watt continuous lights are available, they are hardly as bright as the sun, which is what you said above. I cut my photographic teeth on photoflood lamps more than three decades ago, and I can assure you that even when approaching twice that much output we weren't anywhere close to "sunny 16" settings.
Frankly, and to be perfectly blunt, I don't think you know what the heck you're talking about.
Roland W wrote:
...Typical strobe maximum power is 1200 Watt Seconds. Typical modeling light is 400 Watts. Sync speed for full frame camera is usually 1/250th of a second. Typical energy transfer of a 1200 Watt Second strobe into a 1/250th exposure gives an effective power of about 600 Watt Seconds.
The 400 Watt modeling light is thus about equal to a 1.60 Watt Second strobe (400 Watts times 1/250th of a second equals 1.6). So the modeling light is 1/375th of the power of the strobe, which is about 8.5 stops different. That is a big difference. An alternate view is that you would need a modeling light of about 75,000 Watts to get the same exposure that you can get from the strobe at 1/250th of a second. Try modeling in front of a 75,000 Watt light from about 8 feet away and see how long you last....Show more →
Here, on the other hand, is someone who does know what he is talking about.
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