DIY Telescope Kit 75 mm Convex Lens 100 cm Focal Length and 50 mm Concave Lens 15 cm Focal Length for School Science Experiment, Kids and School Students etc - SmartBuy365
Amazon.com: Piru Small 9 inch Size Brass Telescope with Tripod Stand. Desk Decor and Home Decor Item Decorative Showpiece - 15 cm (Brass, Gold, Brown) : Home & Kitchen
Sky & Telescope's 15-CM Earth Globe - Walmart.com
Telescope Accessories 80900 Back Portable Storage Handbag - Temu
Four lenses of focal length ±15 cm and ±150 cm are available for making a telescope. To produce the largest magnification, the focal length of the eyepiece should be 1)+15 cm 2)+50 cm 3) 150 cm 4 15 cm