I conceived the project several months ago but it had a low priority. It finally moved far enough up the list that I finally added the sketchpad to my shopping list. The pad sat around the studio for 4 more weeks before I did the first setup.
http://www.thephotoforum.com/forum/black-white-gallery/212119-tubularcongruence.html
Camera right, you are seeing the underside of the top sheet of paper. It's the only sheet that reveals it's underside.
Yep, 3 thumbtacks on each side, are holding the sheets in place.
I used a piece of white foamboard as a base to thumbtack the sheets of paper to. The bottom sheet is flat and is there just for it's texture. It's all sitting on a small round table I use to shoot small products.
The background is Thunder Gray seamless paper. Camera left is a large, bare, north facing window and camera right is a 42", round, black 5-in-1 to subtract light.
I used a Nikon D300, with a Nikon AF 24-85 mm f/2.8-4D lens set to 35mm and in Macro mode. The lens was on a tripod with the front of the lens about 6 inches from the front of the setup.
The camera settings were: f/16 - 1/160 - ISO 200.
The SB-600 was in manual mode set to 14 mm zoom, had the wide angle diffuser down, and a blue gel on it. The power was set to 1/64 and the light was pointing towards the camera. I used
eBay iShoot radio triggers (Seller: lilyrst)
PT-04 C Radio Wireless Remote Double-Flash Trigger?3Rx - eBay (item 280402884186 end time Aug-24-10 01:50:11 PDT)
The original was a RAW file post processed using ACR 6.1 and CS 5. I duplicated the background layer and then made a new, blank layer from it. I filled the new blank layer with 50% gray. This new layer was for dodging and burning.
I then made a Curves Adjustment layer, a Black & White Adjustment layer, flipped the image 180 degrees (right to left), did my dodging and burning, straightened the 'horizon', did my final crop, made a final Exposure Adjustment layer, and added the borders.
Here is the original image: