This is a Photek U-Series 36" (91cm) Silver Umbrella with a 7mm umbrella shaft. Photek U-Series umbrellas are manufactured on a 10-spoke frame, giving them more stability than an 8-spoke frame used by most other umbrella manufacturers.
A white umbrella greatly softens and broadens the light output of any strobe or lower wattage constant light. Silver umbrellas soften, too, but they provide a slightly "harder" light, with specular features in the highlight areas.
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Comments about Photek Umbrella with Permanent 7mm Shaft, Silver - 36" (91cm):
It might have something to do with the metric system but the 7 mm shaft on this umbrella isn't 7 mm. It's more or less 6 mm and therefore slides out of the Elinchrom heads while tilted down. I reported this to B&H and received a new one (thanx for the service). Unfortunately the new one was the same story, this shaft also isn't 7 mm but thinner. I recommend you to inform Photek they have to remeasure their stuff because you can't sell these umbrella's as 7 mm because they aren't.
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