Hello, I am struggling finding out useful information on my ccurrent A Level task which is I am creating a Lamp but my brief describes that I need to include a second function. For this I chose to add a projector into the design that can use just a fully blacked out box, a mobile phone and a Bi-convex lens. Obviously I do not have much space to work with if I have to include this idea within a lamp shaped design. My question is, what sort of Bi-convex lens would I need to have the best looking picture displayed on a wall. Would the lens have to be 40mm, 60mm, 100mm? and where is the best place to look for these items. Thank you and just ask if you need me to elaborate more via /r/DIY http://ift.tt/2l4Ze3V
