Telecentric and hypercentric optics are very different from our eyes or normal camera lenses. They have "negative" perspective or no perspective, respectively, leading to very unusual images. In this video I show how to use a common fresnel lens in the creation of your own telecentric optical system.
Fresnel lens, 300mm dia. 200mm FL is sold out... https://www.amazon.com/gp/product/B071ZQL9YZ/
$5 projection lens on eBay: https://www.ebay.com/itm/Delta-108-Projection-Lens-from-U-S-Precision-Lens-inc/264605738684
Good practical discussion of telecentric optics: https://www.lockhaven.edu/~dsimanek/scenario/labman3/telecen.htm
Idea to use macro tubes for telecentric conversion of normal lenses came from here: http://www.4photos.de/camera-diy/Telecentric-Lens.html
In-depth info on telecentric lenses: https://schneiderkreuznach.com/application/files/9715/0781/8897/optical-measurement.pdf
Commercial hypercentric and telecentric lens maker: https://lw4u.com/
Paper on making telecentric lenses with fresnel front elements: https://sci-hub.tw/10.1117/12.455256