Alien bee 800 modeling lamp

Discussion in 'Photography Equipment & Products' started by SabrinaO, Nov 4, 2010.

  1. SabrinaO

    SabrinaO TPF Noob!

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    What is the point of the modeling lamp? Is it so we can meter the light? Does the modeling lamp put out the same power as the strobe when it goes off...turning off when the strobe goes off? Please help... i just got my AB today. A little in over my head!
     
  2. Buckster

    Buckster Been spending a lot of time on here!

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    The modeling lamp allows you to see where the light and shadow will fall when the strobe goes off, how soft the transition looks, etc., giving you the ability to sculpt the light around your subject as you see fit before you start firing.

    It doesn't put out the amount of light the strobe does, and probably doesn't have the same color temperature either.
     
  3. SabrinaO

    SabrinaO TPF Noob!

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    Thank you for your help! Does the modeling lamp turn off when the strobe fires?
     
  4. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    Thats right, the modeling light is to help you visualize the light before the shot.
    The light is much, much less powerful than the flash bulb so you can't meter it.
     
  5. SabrinaO

    SabrinaO TPF Noob!

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    Thanks... but :x:x!! Meters cost so much... I was hoping i can meter off this. :lol:
     
  6. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    You can set the modeling light to turn off while the strobe recycles; that way you cab easily know when the strobe is ready to fire again. You can also set the modeling light to track the power setting of the strobe.

    I'm sure that all of this is in the manual.
     
  7. SabrinaO

    SabrinaO TPF Noob!

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    Ok thanks! I'm happy im getting QUICK responses from you all... i appreciate it! Much better than DPS :lol:
     
  8. Derrel

    Derrel Mr. Rain Cloud

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    Every single thing Buckster says is spot-on. Most people should just stop reading right there, where he left it.

    There is however an old-school method where you figure out the best-looking exposure of an 18 percent gray card, or a color patch chart, or your typical subjects by shooting pictures of them using the flash unit and noting the exact f/stop and ISO that gives a good result using your STANDARD shutter synch speed, which used to be 1/60 second, but today is more likely 1/160 to 1/250. Then, once the ideal flash exposure for a particular aperture and ISO is figured out, you place a metering target in the subject position, and take a light meter reading at the same ISO and f/stop, and compute the difference between the right FLASH-lighted exposure, and the modeling light exposure. This is called computing the "offset" value between the full-output of the flash unit, and the full, highest-power of the modeling lights.

    This is a very old, roundabout method, but it DOES give one the ability to sort of measure the lighting that the flashes will produce, based upon using a continuous light meter or a camera's in-built meter to measure the strength of the modeling light. Unfortunately, this method has limitations.
    BUT, it was better than nothing back in the days of slide film and no flash meters...today with digital cameras, this method is not nearly as critical to know.

    The key is that when metering the modeling lights, you need to use the same ISO and the same SHUTTER speed as the flash will use every single time, and vary the f/stop ring to determine the exposure. If one needs to ask why the shutter speed must always be the same when measuring continuous lights, then this information is way over one's head...
     
  9. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    It's a different type of metering. Your camera meters ambient light, not flash. To meter the strobe, you need a flash meter and yes the are expensive.

    You can still use your strobe, you will just need to figure out the exposure another way.

    Put the camer in manual mode. Put the shutter speed to 1/125 and then use the aperture to change the flash exposure inthe photo. There is more to it but that's the general idea.
     
  10. KmH

    KmH Helping photographers learn to fish Supporting Member

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  11. SabrinaO

    SabrinaO TPF Noob!

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    Yeah i know. I was hoping the modeling lamp put out the same light as the strobe so i can meter off the modeling lamp.
     
  12. SabrinaO

    SabrinaO TPF Noob!

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    what f/stop should i put the strobe to? Or does that depend on my lighting/subject/effects/situation...?
     

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