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A Penny Date (again)

Each time my camera gear advances, I think about the penny date and can my new gear do even better.

This time I've added an 18 MP camera body, the Canon EOS 7D, extension tubes and a Camera Focus Rail. I've also been learning.

Seems my wonderful 100mm Macro lens can get 1:1 images. That means the lens can display on the sensor an exact 1-to-1 image of the object in front of the lens. The tip in the Canon 100MM Macro User Manual says to set the focus dial to its closest focus position, marked 1:1, and move the camera to achieve focus.

Yeah, right, easier said than done. But I read about focusing rails and some are not all that expensive. The rail that I ordered from Amazon was only $65. It has 2 6" scales for in and out plus left-to-right precision movement. For height, the third axis, I have to move either the object (penny) or the camera tripod post up or down.

The new problem? I got so close, or the image got so big, that one digit is larger than the target 640 by 480 image that I have set as a standard thru all these Penny Experiments. In the end, I reduced (resized in Photo Editor) the digit-image to 640 by 480 to conform.

The next problem is that the digits are taller than they are wide so I turned them 90 degrees for the first time. Four images form the date: 2011.



Requires a rather wide monitor to see all for date digits side by side. I use a 1920 by 1200 pixel monitor.

Step 1: 1 to 1 image, no flash:

Step 2: 1 to 1 image, with ring flash:

Digital camera sensors and pennies. My digital camera has an APS-C sized sensor. The sensor actual size of 22.3mm by 14.9mm. It is not a 'full frame' 35mm camera. A penny is 0.750" in diameter, or 19.2mm, so it is taller than my sensor but not as wide. See illustation.