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This year's hot fashion tip. T Shirts that are 18% grey, with the words "18% Grey" to identify them, and act as the brand name.
If we can get everyone wearing them this summer, the life of the photographer is made considerably easier (if you use a spot meter).
Grey Card
http://en.wikipedia.org/wiki/Gray_card
Calibration for light meters [csea, May 10 2008]
This again
http://www.scooperg...ges/beigeometer.jpg
Beigeometer [nineteenthly, May 10 2008]
Make Pavements 18% Grey
Make_20Pavements_2018_25_20Grey
hmmmmm... [hippo, May 11 2008]
Spot metering
http://spotmetering.com/
A brash, loud, noisy, ill-designed site with an irritatingly in-your-face tone suggestive of the least acceptable traits of those people who talk so loudly across the room you can't even hear your own conversation. However, everything it says is absolutely spot-on, and this should be read by anyone claiming to want to take photos whilst in control of a camera. [Ian Tindale, May 12 2008]
18% Grey?
http://www.folica.com/Men_s_204_1.html
For all your self-conscious needs. [Amos Kito, May 14 2008]
Grey Sweatsuit Revolution
http://www.thegreys...m/sweatsuit_02.html
Then there's this... [nineteenthly, May 15 2008]
Annotation:
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Are the words "18% Grey" also printed in
18% grey on the 18% grey material? And
what if someone merely takes a white T-
shirt and adds a black square covering
18%
of its area? |
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That would only work if your spot meter's spot is the correct distance to integrate the full image of the t-shirt's area correctly. That would be exceedingly difficult, and would not act the same across different spot meter implementations. |
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Make 'em and I'll wear one. |
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umm... I'm missing some background on this I think... |
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white T's go grey after time so do grey T's go greyer? |
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The top football teams tend to release a
mind-numbingly dull grey away kit
every now and then. Part of the
ongoing research into the principle that
some fans will wear anything. |
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I think it must be Arsenal's turn by now.
If so, there'll be plenty of them around
this summer to calibrate off. |
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[Edit: just had a fish around the
footballshirtculture site and in fact it's
Liverpool's turn (away 08-10).] |
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It would change colour after a while. Either it would get washed with a red sock, it would get bleached or it would get dirty. If you could get it to stay eighteen percent grey, that would really be a good idea because it could be applied to other colours too. Then you'd get a "Man In The Grey T-Shirt" scenario. |
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Ok. Maybe I am the only one who is getting this wrong- I thought that "18% Grey" meant something that was originally black and then after washing it a few times, it starts to lose its intensity. Then when it starts to turn grey I figured it was roughly 18% away from black. |
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Why?? Is there some reference I'm not getting? |
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But if everything is 18% grey (see Ian's
previous idea on this theme, linked) there
won't be anything left to take photos of. |
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Indeed. Everything will start off looking like an HDR photo. |
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If you can refer to a spot meter - past or
present (real not made-up) - that is
somehow calibrated for 36% flat
reflectance, then maybe that would work
for such a minority of cases (ie, 0), but in
the mean time, everyone else with a
reflectance exposure meter will be
expecting the scene to average to 18%
grey flat reflectance. |
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Why not simply paint the inside of the
spot-meter's window with 18% grey, then
it would work everywhere. |
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I hope someone has a white T-shirt. Focusing on a white object is the only way to override the white-balance presets on my camcorder. |
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I thought it would be unlikely, but
18percentgray.com is taken. |
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What [MaxwellBuchanan] said. |
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You could do that - paint the inside of
the meter's lens 10% grey, but you'd
have to illuminate it somehow, and the
easiest way of illuminating it is to let
outside light in, which is of course
cheap and readily available. However,
you'd also need to calibrate this light,
so that you can bias the reading that
the spot meter is displaying. One way of
doing this is to measure the light value
coming in from the outside world. For
this, you'd need to have an exposure
meter built in, connected to a display of
some sort. |
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[Amos] But are your whites *really* white? What washing powder do you use? |
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Tthe washing that most white shirts go
through makes them inappropriate for
white-balance. They're too flourescent and
are actually toward the blue end to be
accurate white-points. |
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Perhaps this t-shirt should be 18% grey on the front and a true white-point white on the back. |
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There could possibly be T-shirts which were either disposable or were 18% grey when first purchased. Maybe they could have a water-soluble text on them which said something like "unwashed" or "18% grey". However, there's still the issue of dust, sweat and so forth. They'd probably have to be unbleached too. |
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Hm, spot the photographer who still uses film! I prefer white t-shirts, which I use to get the color balance right on my digital camera. (And I can see right away if the exposure is wrong.) |
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You could probably argue that you need everyone to wear wet t-shirts to ensure proper exposure for IR film, or something. |
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//inappropriate for white-balance//
Dry cleaning is preferable to water wash, to maintain fabric condition. But you'd need to check the color, to be sure it's still 18% grey, etc., by holding a test card on it. Cotton-blend shirts are bound to change shades, and then they need to be re-labeled. |
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I'll take this in 18% red....cuts to Ian
Tindale tearing out clumps of hair by the
roots. + |
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How about some kind of metallic or glass
fibre fabric, containing microscopic beads
of titanium dioxide and/or carbon? Also,
why a T-shirt rather than some form of
outerwear which is less likely to be washed
quite so often? |
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Ohhh.... I am so con-fuse-ed! |
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Underpants you never wash, made of fibreglass? Sounds groovy to me, [Ian]. |
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The words should say "Not 18% Grey", in 18% grey printed font. If you can read them, don't use that shirt. |
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If you are concerned that your 18% grey t-shirt might fade, try getting an 18% grey tattoo. Have it put on the inside forearm of your less dextrous side for easy reach. |
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[tpunchl], that's excellent! |
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Awesome idea, but as reflection has
shown us, no good for practical
purposes. Great in-joke t-shirt though. |
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ALL camera cases should be 18% grey. With an inside cover that is white, for the new digital equipment. |
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Well, as far as a fashion rave, it is absolutely FABulous. I could see some hot hunky Abercrombie and Fitch model, strutting his stuff down Carnaby Street with a big 18% on his chest.
All the real models giving him an all-knowing nod as he passes by, and all the wannabes going, "What is this 18% all about? I just HAVE to know!! Is it his body fat? Is he 18% gay? WHAT IS IT? OH I so Desperately want to be an insider!" |
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Suddenly, I *so* do not want this T-Shirt |
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My current T shirt is 0.073% egg yolk in
colour following breakfast. |
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So this shirt is an upgrade? |
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A little late but //And what if someone merely takes a white T- shirt and adds a black square covering 18% of its area?// |
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Would it not then be an 18% black T-Shirt. |
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