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A progression from this, still a bit rough though. Sort of like a "triangle video compression". Areas with more detail split into smaller triangles, areas with less detail stop iterating and fill with the average color.
Playing about with a triangle shaped aperture in the filter slot of the Rogonar-SC 50mm f2.8 enlarger lens.
Model: Triangle Twist Flower
Design: Diana Teica
Size: one Hexagon with a side-length of 12cm; grid of 32
Paper: sandwich-paper
Some days ago I met my origami-friend Anett in Munic to do some folding.
She gave me as a gift a little model of Triangle Twist Variations. I was thrilled about the beauty. – At home I tried it for myself. And very deep in my brain I remembered a photo I made in Berlin at the German Origami-Convention. It was a tessellation made by Chantal Pixley. I took a second look at this photo and tried to do fold it. And happily I made it !
Thanks for inspiration to Anett and Chantal Pixley.
Here is the photo I remembered
www.flickr.com/photos/faltwelt/14119655772/in/set-7215764...
Please have a look at Chantal’s flickr site:
Posted on PigPog: pigpog.com/2015/01/02/triangle-2/
Triangle roof over the Seed art installation in The Core building at the Eden Project.
2048 x 2048 pixel image for the iPad’s 2048 x 1536 pixel retina display.
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The three elements are:
ISO - the measure of a digital camera sensor’s sensitivity to light
Aperture - the size of the opening in the lens when a picture is taken
Shutter Speed - the amount of time that the shutter is open
The Window
Imagine your camera is like a window with shutters that open and close.
Aperture is the size of the window. If it’s bigger more light gets through and the room is brighter.
Shutter Speed is the amount of time that the shutters of the window are open. The longer you leave them open the more that comes in.
Now imagine that you’re inside the room and are wearing sunglasses (hopefully this isn’t too much of a stretch). Your eyes become desensitized to the light that comes in (it’s like a low ISO).
There are a number of ways of increasing the amount of light in the room (or at least how much it seems that there is. You could increase the time that the shutters are open (decrease shutter speed), you could increase the size of the window (increase aperture) or you could take off your sunglasses (make the ISO larger).
Ok - it’s not the perfect illustration - but you get the idea.
Another way that a friend recently shared with me is to think about digital camera exposure as being like getting a sun tan.
Now getting a suntan is something I always wanted growing up - but unfortunately being very fair skinned it was something that I never really achieved. All I did was get burnt when I went out into the sun. In a sense your skin type is like an ISO rating. Some people are more sensitive to the sun than others.
Shutter speed in this metaphor is like the length of time you spend out in the sun. The longer you spend in the sun the increased chances of you getting a tan (of course spending too long in the sun can mean being over exposed).
Aperture is like sunscreen which you apply to your skin. Sunscreen blocks the sun at different rates depending upon it’s strength. Apply a high strength sunscreen and you decrease the amount of sunlight that gets through - and as a result even a person with highly sensitive skin can spend more time in the sun (ie decrease the Aperture and you can slow down shutter speed and/or decrease ISO).
neither metaphor is perfect but both illustrate the interconnectedness of shutter speed, aperture and ISO on your digital camera.
NB: A third metaphor that I’ve heard used is the Garden Hose (the width of the hose is aperture, the length that the hose is left on is shutter speed and the pressure of the water (the speed it gets through) is ISO.
written by digital-photography-school
an impossible triangle without trick or retouch
『不可能な三角形』は、物理学者ロジャー･ペンローズが心理学雑誌に発表した、ありえない立体です。三次元の立体としては存在できませんが、二次元の平面にあらわすことはできます。
版画家のM.C.エッシャーは、ペンローズの論文に触発されて『滝』を制作しました。
SONY Cyber-shot DSC-F88
Over 58,000 people attended the Freight Rover Trophy Final at Wembley in May 1987 where fans saw Mansfield Town beat Bristol City in a penalty shootout following a 1-1 draw at full time.
Seen in the coach park that day was Blue Triangle of Rainham Daimler Fleetline / Park Royal JGF404K, formerly London Transport DMS404.
2048 x 2048 pixel image for the iPad’s 2048 x 1536 pixel retina display.
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Just an attempt to take Francis Ow's idea a little further. Instead of modules, I folded this from a single strip of paper 7.5 x 32 cm long, incorporating and slightly tweaking Thoki Yenn's idea used in his Umulius Rectangulum. Probably wouldn't have tried this had Francis not provided the necessary hints. Anyway, the effect would have been a lot better if I had been neater with the folding and more patient with the photography but I have messed up my cave too much and am already way behind time with spring cleaning ... :-). How many weeks do I have before Chinese New Year?
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