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12/31/2008 10:24:29 PM · #1 |
Is there a correlation between Watt Seconds and Guide Numbers?
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12/31/2008 10:34:48 PM · #2 |
Originally posted by Man_Called_Horse: Is there a correlation between Watt Seconds and Guide Numbers? |
Yes there is, but it's not straightforward to determine because it depends on how efficient the light unit is in converting electrical energy into light.
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12/31/2008 11:59:35 PM · #3 |
:) Anyone else with more detailed info?
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01/01/2009 12:30:13 AM · #4 |
Originally posted by Man_Called_Horse: :) Anyone else with more detailed info? |
What more detail could you want?
The Watt-second rating for a given strobe is NOT a measure of light output. It's a measure of how much electrical energy is consumed in a discharge of the flashtube. The amount of light output from a certain Watt-second discharge is dependent on the specific light unit used. In other words, you could have a 1600 Watt-second strobe unit and another, different, 1600 Watt-second unit, fire them both on the same setting and get a different exposure reading, or light output.
Another variable in determining GN would be the reflector that's used on the specific strobe head. By changing the reflector, you can dramatically affect the calculated GN.
If you want a chart of GN as a function of Watt-seconds, your best bet is to develop it yourself, using your gear setup the way you want it because what applies for one setup, won't carry over to your setup unless they are very similar. |
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01/01/2009 12:39:00 AM · #5 |
Originally posted by Spazmo99: Originally posted by Man_Called_Horse: :) Anyone else with more detailed info? |
What more detail could you want?
The Watt-second rating for a given strobe is NOT a measure of light output. It's a measure of how much electrical energy is consumed in a discharge of the flashtube. The amount of light output from a certain Watt-second discharge is dependent on the specific light unit used. In other words, you could have a 1600 Watt-second strobe unit and another, different, 1600 Watt-second unit, fire them both on the same setting and get a different exposure reading, or light output.
Another variable in determining GN would be the reflector that's used on the specific strobe head. By changing the reflector, you can dramatically affect the calculated GN.
If you want a chart of GN as a function of Watt-seconds, your best bet is to develop it yourself, using your gear setup the way you want it because what applies for one setup, won't carry over to your setup unless they are very similar. |
THIS is what I wanted, if in fact it is from your experience and not from wikipedia.
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01/01/2009 12:39:56 AM · #6 |
Originally posted by Man_Called_Horse: Originally posted by Spazmo99: Originally posted by Man_Called_Horse: :) Anyone else with more detailed info? |
What more detail could you want?
The Watt-second rating for a given strobe is NOT a measure of light output. It's a measure of how much electrical energy is consumed in a discharge of the flashtube. The amount of light output from a certain Watt-second discharge is dependent on the specific light unit used. In other words, you could have a 1600 Watt-second strobe unit and another, different, 1600 Watt-second unit, fire them both on the same setting and get a different exposure reading, or light output.
Another variable in determining GN would be the reflector that's used on the specific strobe head. By changing the reflector, you can dramatically affect the calculated GN.
If you want a chart of GN as a function of Watt-seconds, your best bet is to develop it yourself, using your gear setup the way you want it because what applies for one setup, won't carry over to your setup unless they are very similar. |
THIS is what I wanted, if in fact it is from your experience and not from wikipedia. |
Straight from the gourd. |
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01/01/2009 02:52:56 PM · #7 |
bump for more enlightenment.
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