Optivisor Interchangeable Lens Plates Donegan offers a range of Optivisor lens plates to suit their visors. Optivisors are hands-free, headband binocular magnifiers. Normally you would buy an optivisor with a lens already in it. All lens plates will unclip allowing you to change to different magnifications. With optical-grade ground and polished lens available in multiple dioptric strengths. These provide specific magnification power (X) at specified focal lengths, or distance from object. The magnifier enhances the size and resolution of an object or image. It is commonly used for a variety of applications such as: jewellery making watch-making needle work artwork electronics print inspection stamp-collecting Medicine Optivisor lens plates chart
