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Step 4Measure twice, cut once - or just get lucky
Once I was satisfied that the uncut jug was watertight, I started measuring.
This was probably the hardest part of the project, because the inside of the jug tapers down toward the bottom, making it hard to measure properly. I ended up winging it with an educated guess, so take your time and do your best. Remember, if you mess it up, you can always buy another jug for $4 or so.
I placed the camera, with the wide-angle lens attached, lens-down into the jug. Using a long pencil, I did my best to mark a circle around the lens. I then placed the jug on a level surface and eyeballed about where the circle was relative to the outer edge of the jug, and marked a dot with a Sharpie on the outside bottom of the jug. I hoped the dot marked the center of the circle. I was about to find out.
This was probably the hardest part of the project, because the inside of the jug tapers down toward the bottom, making it hard to measure properly. I ended up winging it with an educated guess, so take your time and do your best. Remember, if you mess it up, you can always buy another jug for $4 or so.
I placed the camera, with the wide-angle lens attached, lens-down into the jug. Using a long pencil, I did my best to mark a circle around the lens. I then placed the jug on a level surface and eyeballed about where the circle was relative to the outer edge of the jug, and marked a dot with a Sharpie on the outside bottom of the jug. I hoped the dot marked the center of the circle. I was about to find out.
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