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Do you mean just the lens? There's one in each of those old school overhead transparency projectors. Those should be easy to find. https://www.bhphotovideo.com
by thekevan 6y ago
Do you mean just the lens? There's one in each of those old school overhead transparency projectors. Those should be easy to find.
https://www.bhphotovideo.com/c/product/592006-REG/Dry_Lam_50030_Fresnel_Lens.html https://www.bhphotovideo.com/c/product/592006-REG/Dry_Lam_50...
- arianvanp 6y agoNo that's a lens. A Frensel reflector doesn't led light through bit instead reflects the light. Basically the same idea as the parabolic dish, but as a flat sheet.