Hi,
Just a newbie in DIY projectors. Would like to ask if I could use old plastic fresnels from an old 3M OHP. It seems that the grove of this fresnels are diagonal not circular.. thanks
Just a newbie in DIY projectors. Would like to ask if I could use old plastic fresnels from an old 3M OHP. It seems that the grove of this fresnels are diagonal not circular.. thanks