25mm C-Mount Telephoto Lens for IMX477 Raspberry Pi High Quality Camera - Unmanned Tech UK FPV Shop
35mm C-Mount Telephoto Lens for IMX477 Raspberry Pi High Quality Camera - Unmanned Tech UK FPV Shop
Durable Camera Lens 1.8mm 1/2.5\" 360-degree 5MP Accessories High Quality | eBay
Prices Canon compared with Nikon 500mm and 600mm telephoto lenses for sports and bird photography, but also useful for flowers high in rain forest trees (in Guatemala).