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Mostly physical, the D-Lites aren't meant for very heavy modifiers. About 4ft diameter is the max. recommended, or just use indirect boxes. The latter are renowned for their surprisingly even light...
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You shoot with daylight coming through the windows - continuous light would have to match its power, that's a set of challenges on its own.
I'd go with entry level studio strobes. They are less...
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On a tangent: Doubled GN means same exposure at twice the distance. That implies a spot of light twice as high as well as twice as wide - 4 times the area to be lit. Just doubling the ISO goes only...
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Because Rembrandt sat on his ears when Jacob told him that the rules that make a good picture are fully explored and set in stone.
Instead he came up with pictures that tell a story, raise...
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The tubes have a surprisingly strong falloff - you need to be close to the face to get a recognizable reflection. At the same time they create a blend of evenness & definition you'd normally expect...
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We did that at a steampunk&creative anachronism fair a few years ago - still getting requests for the various legacy processes. Most are equally interested in the product as well as the whole...
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4 fluorescent tubes in a #-arrangement. Like a big ringlight, but...more angular :)
If you've got the cash you could use striplights(the real thing, not elongated softboxes) instead.
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You sound like the ruling council of the photographers guild we ha(ve/d). Their problem is the usage of technical apocrypha and indoctrination with a highly formalized approach as entry barrier....
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Depends on the kind of customer structure you want to have. Off the rack with cutthroat to suicidal prices or rather taylormade for clients willing to pay?
Sure - but will that segment buy at a...
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Those lights (Jinbei/Goldenshell and Photoflex have similar offerings, the former also with double the power, called EF-200) have about 10klm output. Well, 100W go in, LEDs have about 130lm/W,...
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You can only subtract noise that occurs in the camera. Noise already there in the signal to be sampled can't be suppressed because it follows no rules, only longer exposure helps here.
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The spectrum is the crucial point - if you want to keep it you can only cut the invisbile parts, i.e. mainly infrared. That implies that we'll hit a hard ceiling at about twice the light per watt...
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Don't know how those flash triggers behave, and if they are fast enough - with fast "sync cord over radio"-triggers or PW FlexTT&touchscreen Sekonic:
You don't set the flash to HSS, just plain old...
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Even in terms of portability the battery packs do fairly well - I'm thinking in terms of a Quadra or something akin vs. enough flashguns to do the same job.
But then no one says we can't mix and...
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Its the combining stage. The best way to avoid random noise is to take lots of measurements and average the results. While 2 samples isn't really a lot its about sqrt(2) better then just one.
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Some ideas:
There are Speedlight brackets for the Bowens S-Mount, Phottix makes one for example. Which means you can attach a wide range of light shapers.
Then you've got Lastolites Ezybox family...
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In raw power the Einstein is a bit weaker, but thats less then a 1/3 stop. The details of the actual reflectors you attach will have much more impact. Different brands, but using a 11" reflector...
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Halogen as such isn't that problematic, although you might get increased noise in the blue channel. Also the color will shift quickly if you dim them past minor adjustments. Better then the cheap...
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You can always look for Arri - the L7 have a CRI 95+, similar to all those discharge lights. Boils down to budget, how much is the convenience worth to you, or are there technical requirements that...
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You can give your Speedlights a Bowens mount. http://www.phottix.com/en/phottix-hs.html would be one such product, others had the same idea (but atm I find only the local resellers).
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