This is a water magnifying lens, instead of a glass or plastic lens, i trapped water between two sheets of transparent food wrap.
When water fills the space between the two sheets it pushes the sheets to the sides and creates a curvature similar to the curvature of a glass lens, by increasing or decreasing the amount of water you can control the focal length of the lens.
I tried using sheets from transparent plastic bags but they tear when assembling the magnifying lens. food wrap was tear resistant.
Also use food wrap when closing the bottom plug, it will help with leaking water from the bottom, and also prevent air from going in and pushing water out.
I named this design Al-Haythm after the great Arabic scientist Hasan Ibn al-Haytham who is considered the father of modern optics.
1) Rotate the middle part so that its laying on the bed(support is needed only for the tip of the handle)
2) Rotate the cover-part so that its laying on the bed(support is not needed)
3) Didn't use rafts
1) Place food wrap sheet on one side of the middle part
2) Press fit the cover-part on the middle part.
3) Repeat step 1,2 with the other side of the middle part
4) Fill water through the channel in the handle
5) Cover the handle with the printed plug(advised to place a food wrap sheet between the plug and the handle, it helps with leaking)