Our products are sold worldwide and are highly regarded. We have very high quality standards for our products, if you have any questions about our products, please contact us. We will reply within 24 hours. Welcome to our store, we will serve you before and after the sale. If you have any questions, please feel free to contact us. Objective lens aperture: 50MM Eyepiece color: blue film Field of view: 90M / 1000 M Prism material: BAK4 prism Magnification: 20X Exit pupil distance: 18MM Focus mode: center focus right eye fine adjustment Tips: 1. If You Have Not Received The Goods Within 30 Days, Or Have Any Questions About The Products, You Can Contact our Customer Service, Your Trust is Our Pursuit. 2. There are a Lot Of Good Products in My Store, You Can Enter The Store if You Need prompt: All product parameters may have a small range of errors, the dimensions are for reference only, subject to the actual product After-sales warranty: We guarantee that you will receive the products you ordered as long as the product has any quality problems, we promise to return the replacement or refund