Various Types of Door Viewers


A door viewer, or peephole, is an optical device fitted through a door to enable you to view the other side of the door without opening the door. A peephole may seem to be a small and simple object, but it helps a lot in contributing to the safety and security of your home. Door viewers come in various designs, and knowing the different types can help you choose one that is best for you.


  • The MiniScope door viewer is the smallest type of door viewer, and it is ideal for doors in apartment complexes because it can fit in doors with a 3/8-inch to 1 3/8-inch thickness. This type of door viewer has a 200-degree peephole that is designed to fit thin doors, and only requires a 15 millimeter bore to install. As opposed to other door viewers, this door viewer provides an exceptionally sharp and clear view.


  • The MiniView is designed for extra thin doors, from 1/2 inch to 1 1/2 inches in thickness, and is one of the shortest door viewers available in the market. This kind of door viewer uses a conventional lens that provides a wide angle 200-degree view and produces displays a sharp and clear image. Installing this door viewer requires a 1-inch bore.


  • The XtraScope is a thin, but long, door viewer that can be installed on a hole drilled using a 15 mm bit. This door viewer is specifically designed to be used on reinforced doors, and it can be installed on a thick door ranging from 1 3/8 to 3 1/2 inches in thickness. This type of door viewer uses a conventional fisheye lens that allows a wide 200-degree view.


  • The NuScope door viewer has a 1-inch viewing area that eliminates the need to strain at the door to identify the person on the other side. This door viewer provides clear and sharp images under most lighting conditions using a direct view lens design. This peephole can provide you with a 180-degree view of what is on the other side of the door.


  • The WideScope door viewer is designed primarily to meet the strict requirements of commercial and industrial installations. It is made of heavy duty solid brass and is fireproof and scratch resistant. This type of peephole contains an optical lens that is almost 1 inch in diameter, and can be installed on doors ranging from 1 3/4 to 3 inches in thickness. A WideScope can provide a sharp 200-degree view under any lighting conditions.


  • The Ultravision is a projection-type door viewer that has an advanced form of glass lens capable of providing a wide angle 132-degree horizontal view. This type of lens allows a viewer to see people up to 7 feet away and is designed for installation on doors ranging from 1 1/4 to 4 1/8 inches in thickness, using an optional extended and reversible hood. This type of door viewer uses a prism to project the image onto an opaque lens, but the brightness of the resulting picture is dependent on the light source on the person standing on the other side of the door.


  • Photo Credit tuscan door image by Martin Sproul from
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