How to make a DIY flash extender

Turns out that fresnel lenses can be purchased at Barnes & Noble in the form of reading magnifiers. Since I don’t have a Barnes & Noble within 45minutes, and my local Borders didn’t carry any, I settled for an 8×11 inch lens from Staples. Cost $8. I brought it home, pulled up some product photos of a Better Beamer mounted to a Canon 580EX, and took some measurements of different parts of the Speedlite and Beamer in the photo, then of the actual Speedlite. Some mathematical magic gave me conversion ratios, which I used to calculate the dimensions I needed out of the 8×11 sheet.

About janpenguin

Email: k2.mountain [at] gmail [dot] com Every content on the blog is made by Free and Open Source Software in GNU/Linux.
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