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Focus Stacking with GIMP© & Jewelry photos.


Equipment: Cannon© 700D DSLR with 60mm macro lens. Led strip lighting 2500k & light box.


Step 1. Preparation:

Camera is in manual mode with Aperture set around F13 and ISO 200 / 400 but you don't really want to go much higher than that. From there you can have a bit of tolerance with brightness control by adjusting shutter speed.

Set white balance and I can't stress this part enough. A little trip down to the hardware store and getting a few of the sample color cards from the paint department is a nice way to get the right balance for your pictures, I chose a few neutral whites to greys and experiment with these until I find the right one for the job.


Step 2. Taking the photos

I like to start with the part of the item that is in closest range to the lens and work back. The camera software allows for fine focus adjustments made on the PC as once the camera and item are positioned you want them to remain fixed until finished.

Aft…

Mintabe Crystal Opal Ring 14k Solid Gold Ring

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520 day or I love you day - a math geek love story

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520 or I love you day
Today is May 20th which in Chinese is known as 520 day, these numbers are pronounced Wu 五  Er 二   Ling 零. It is used to confess love since it has a similar sound to "I love you" or Wo 我  ai 爱  ni 你.

In the language of mathematics "I love you" can be written as " ρ=a(1-sinθ) ". This polar equation when graphed will give the curve shown below called a Cardioid. Aptly named since it derives from the Greek word καρδία (cardia) which translates to "heart".


(Graph source)


"The name cardioid was first used by de Castillon in Philosophical Transactions of the Royal Society in 1741. Its arc length was found by la Hire in 1708. There are exactly three parallel tangents to the cardioid with any given gradient. Also, the tangents at the ends of any chord through the cusp point are at right angles The length of any chord through the cusp point is ." Weisstein, Eric W. "Cardioid." From MathWorld--A Wolfram Web …