Celestron SkyMaster 15 x 70 Binoculars - Porro - 71009 Imaging Cameras The objective lens covers of

The objective lens covers of the Celestron Outland X Binoculars are semi-attached so they don'''t get lost on the 42mm sizes

It helps block out a portion of the light the Moon sends into your eyepiece so you can see details better

and after awhile

Anti reflection angle that prevents reflection back to the objective

Celestron Cypress 10x25 Binoculars - Reverse Porro Prism Features

Celestron SkyMaster 15 x 70 Binoculars - Porro - 71009 Imaging Cameras The objective lens covers ofAbout the Celestron SkyMaster 15 x 70 Binoculars The SkyMaster Series of large aperture binoculars from Celestron offer phenomenal performance for astronomical viewing. They are also a great choice for terrestrial use, especially over long distances. All models feature high quality BAK 4 prisms and have multi coatings for enhanced contrast. In addition, the Celestron 15 x 70 Skymaster Binoculars include a photo tripod adapter at no extra charge!