Check the listing for details. AmScope AD-C20-03 0.3X C-mount Lens Adapter for Video Camera Microscopes. Condition: New. Listed at 74.99 USD. Key Features:Focus-adjustable C-mount camera adapter for older microscopes with 28mm threaded photo-ports0.3X magnification power0.3X reduction lens provides wide field of view28mm mounting threadFor select microscopes onlyBrand Name: AmScope Model No: AD-C20-03This is a 0.3X focus-adjustable C-mount camera adapter for older microscopes with 28mm threaded photo-ports. The microscope side has a male 28mm thread, and the camera side is standard 25.4mm C-mount. This adapter would replace the existing photo-tube. It is best-suited for cameras with 1/3" format sensors.Features & Specifications :Power: 0.3XMounting Size on Camera Side: 1" (25.4mm) in diameterMounting Size on Microscope Side: 1-1/8" (28mm) in diameterManufactured under ISO 9001 Quality Control StandardsWarranty: 1 Year Shipping & Handling:FREE Shipping to Contiguous USA (the lower 48 States)