To shoot the art feel images of sky will start with this right camera adapter, you can use M42 lenses on for camera. You can put on the camera and calibrate focal length to get a clear images. Hope you have a nice photographing.Features- Color: Black.- Material: Stainless steel.- Size: 4.50X4.50X4.00cm/1.77X1.77X1.57inch.- , you can buy this practical product at an .- Made of stainless steel material, longer service life and more durable.- The 1.25 inch adapter rings are used for cameras and astronomical telescopes.- workmanship, reasonable structure, professional and practical, can bring you convenience.- Stainless steel materials, easy to carry, lightweight. It is easy to install and operate, easy to use, more practical.Package list: 2 x adapters