Zinn

The Kanohi Zinn was the Mask of Scoping. It allowed it's user to see and focus on distant objects in better detail. It also gave users heightened proficiency in interacting distant objects.

Description
The Zinn is always on at a low level, immediately allowing the user constant clear vision, comparable of a person with 20/10 vision.

When the mask is activated, any visual impairment the user may be suffering from (temporary blindness, visual distortion, etc.) will disappear and will only reappear when the mask is turned off, unless their cause subsides while the mask is on.

The user will then be able to "zoom in" their vision, which decreases their field of view while rapidly increasing the clarity of objects in that view. The furthest the user can zoom their vision is equivalent to seeing a small lake from 200,000 miles away (enough zoom to have Earth's Moon engulf their field of vision). During this, the user can focus their eyes on any object in their field of view.

While zoomed in, the mask can be used to view objects such as microorganisms which are normally too small to see with the naked eye.

The user will also be able to interact with distant objects more easily and more accurately, mostly through the use of projectile launchers, essentially increasing their accuracy somewhat as well.

History
Throughout it's history, the mask has only seen common use among marksmen and archers. Because of this, it was originally one of the most produced masks, as leaders of armies would want a large number of their watchmen to have them. This has spawned the Matoran slang "Zinner", a word originally used among armies for watchmen who wore the Zinn, which then became a more casual term describing somebody who looks into the distance or "spaces out" often.

Trivia

 * The description of how far the mask can zoom in was based off of this video.
 * The mask's name comes from the zonule of Zinn, a ring of fibrous strands in the eye which connect the ciliary body with to the lens of the eye. The ciliary body is responsible for accommodation, otherwise known as focusing the eyes.
 * The mask's original name was the "Zumu", derived from the Japanese word for "zoom".