As said in the previous post my wife got a embroidery machine. While I am only mildly interested in that piece of technology, I found the yarns she bought with it highly photogenic. So I tried to combine them with the assignment task: reflections.
What it took:
It was harder than I imagined to line up the yarns geometrically on our coffeetable (with a glass over black paper) and to adjust the sensor plane so that there are no distortions. But after a lot of trial and error I finally came up with a good setup. Then I fiddled around with the lighting. I found out that the reflection is relatively independent of the light angle as long as it is not lit from behind. So I put the 580 EX II on a second tripod and chose a very steep angle from above the camera to produce the shadows mainly behind the yarns, so that they do not disturb. The flash was set on 1/2 power and the light was diffused with my Flexidome diffusor.
The good thing of all this work was that there was more or less no post processing necessary. Just standard conversion from RAW.
P.S.: Notice to getty: The numbers on the yarns refer to a universal number system and are not a brand or brandspecific.