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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 21 Jan 2010 (Thursday) 14:22
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dpds68
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Jan 21, 2010 14:22 |  #1

I had a shoot last night for a Make up artist's portfolio she basically just wanted eye shots .

I used my 33" Shoot through and Vivitar 285Hv as my Key light , No matter where I moved the key light I got hot spots on the Model's forehead , nose and cheeks I adjusted the heck out of the Vivitar also and no Joy .

When breaking down the lights after the shoot I then noticed that I had the zoom set Tele could that have been what caused the Hot Spots ?


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Austin.Manny
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Jan 21, 2010 14:24 |  #2

Yes, since the zoom was at Tele, that means that it had a smaller spread of light going into the umbrella resulting in a smaller apparent light source resulting in harsher light. Result. :)


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dpds68
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Jan 21, 2010 14:27 |  #3

Oops I had on the Wide Panel but I guess that did not help much .

Thanx Austin


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toxic
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Jan 21, 2010 14:31 |  #4

dpds68 wrote in post #9441717 (external link)
Oops I had on the Wide Panel but I guess that did not help much .

Thanx Austin

I dunno how it is on Vivitars, but on Canon flashes the wide panel overrides the zoom setting.

Maybe your umbrella's too small or it was too far away.

You should be able to burn the highlights back in anyway, though.




  
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dpds68
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Jan 21, 2010 14:33 |  #5

The Vivitar just has a Slide in panel and the zoom is manual .


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RPCrowe
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Jan 21, 2010 14:59 |  #6

Hotspots

Yes, using the wider angle of your Vivitar might have prevented some of the hotspots but, I am not at all a fan of the hotshoe Strobist doctrine!

Using a shoot through umbrella or softbox to diffuse the light that has been concentrated by the relatively tiny flash-head of any hotshoe flash is a lot like boiling ice cubes to make tea. It can be done but, it sure as heck is not the most efficient way to work.

A studio strobe will have a far larger reflector than the hotshoe flash, so you are starting out with a larger light source to begin with. A studio strobe with a reflector 6" in diameter will have a reflecting area of over 28 square inches. I don't have a Vivitar handy to measure but, my 550EX has a reflector 1.5 x 3 inches; providing a reflecting area of 4.5 inches or a very small percentage of the area of the studio strobe's reflecting surface. Additionally, the studio strobe will usually be positioned shoot almost directly into the center of an umbrella, where the hotshoe flash, since it needs an extra accessory mount to be used with an umbrella, will normally shoot through the top half of the umbrella - causing less than even lighting.

However, the primary advantage of a true studio flash is the modeling light providing "what you see is what you get lighting. The hotspots on forehead and cheeks could very well have been detected when viewing the subject with the modeling light.

I don't know how far your shoot-through umbrella was placed from your subject or how far from the umbrella the flash was placed but, both these variables have an impact on the softness of the lighting. The closer the umbrella is to the subject, the softer the light will be. The impact of the flash to umbrella distance is pretty well dependant on the size of your flash reflector. Tiny reflectors used on hotshoe flashes will not cover a large umbrella evenly.

However, that all said, the proper use of makeup will often prevent the shine causing hotspots. Few females, except those who have done some modeling are aware of how to apply makeup for photography. Do a Google search using "photographic makeup" as your search parameters. That will provide links to various sites recommending the proper application of makeup for photography.


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dpds68
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Jan 21, 2010 15:07 |  #7

^^^ Thank you very much for that .


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Jan 21, 2010 15:22 |  #8

Fixing...

An image with imperfections can be fixed in Photoshop. However, I prefer a quicker and easier fix as in Portrait Profesional. I hope you don't mind that I played with your portrait for about two minutes in Portrait Profesional. It's best to avoid the hotspots when shooting but, they don't seem very objectional to me in the fixed version.


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dpds68
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Jan 21, 2010 15:26 |  #9

Looks good I will look into Portrait Professional .


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Jan 21, 2010 16:09 |  #10

Next time, provide a very small amount of facial powder which the model can apply herself using a disposable cotton applicator. No double dipping into the facial powder, only new applicators go into the powder supply for hygenic reasons!

Or use a larger apparent light source, like firing into an umbrella/softbox or into a translucent shoot thru panel


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