Fresnel Lens - Cannot resist buying
Ok, I just saw a big fresnel lens(I think its around 6 inches diagonal) at a shop and its really cheap (less than $2). I really really really want to buy it, but cannot really justify.
Anyone wanna help me justify my purchase so that I can just march out today evening and buy it?
Any DIY that I can do, any customizations, ANYTHING is welcome
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