2.4G Wireless Pinhole Hidden Camera & 7in TFT LCD 2.4GHz 4-Channels Wireless AV Color Monitor IP297958

Specifications:

• Infra-red LEDs for night-time vision, effective night vision range: 5m
• 380 TV lines clear picture display, weather-proof design for outdoor usage, alloyed shell
• 4-channel available to channel scan and channel skip for multi-camera usage
• Built-in microphone for audio monitoring, 7 inch TFT LCD 2.4GHz 4-Channels wireless AV color monitor
• Receiver inside, easy installation
• PAL/NTSC System
• Remote control with full functions
• On screen display (OSD) menu
• This pinhole camera is Environmentally,with friendly design

Details:

• Four wireless pinhole hidden cameras and a TFT LCD monitor

• The back of the video monitor is of simple design and a holder can be posed anywhere

• The holder and the signal receiving antenna can be folded for take

• Power converters and signal video cable are equipped with the camera monitor

Monitor: 

• Aspect Ration: 7 inch(16:9)
• Display Element: Color TFT LCD
• Video System: PAL/NTSC
• Active Area: 154.08mm x 86.58mm
• Resolution: 480(H) x RGB x 234(V)
• Receiver Channel: 4 Channels
• Brightness: 200cd/m²
• Contrast Ratio: 300:1
• DB Level: -90dB
• Composite Video (AV): One-way AV input
• OSD Language: English
• Input Voltage: DC 12V
• Max Power Consumption: ≤8W
• 4 Receiver Channel: CH1: 2414MHz, CH1: 2432MHz, CH1: 2450MHz, CH1: 2468MHz
• Size: 19.0 x 14.0cm/7.4 x 5.5in(L x W)

• The size in detail of the monitor of the security system

Camera:

• Validity Pixel: 628(H) x 582(V), 510(H) x 492(V)
• Image Device: 1/3" OmnVision CMOS
• Horizontal Definition: 380TV Line
• Angular Field of View: 45° (f=6mm)
• Minimum Illumination: 3.0Lux(F1.2)
• Scanning Frequency(H): 15.625KHz/15.734KHz
• Scanning Frequency(V): 50Hz/60Hz
• Power Adapter: DC 8V/500mA
• Size: 3.5x2.5x5.0cm/1.3 x 0.9 x 1.9in(L x W x H) 

• Size in detail of the wireless spy pinhole hidden camera

what is Pinhole Camera?

• A pinhole camera is the most basic type of camera, made up of a light-proof container (usually a box) with a tiny hole in the one side (hence the term "pinhole"). Film or photographic paper is placed on the inside of the box, opposite the hole. Light enters through the hole and creates an inverted image on the film

Natural Pinhole Cameras

• mages created in the same manner as a pinhole camera occur naturally. Descriptions of these types of images have been recorded for centuries. Mo Ti, a fifth century B.C.E. Chinese philosopher, observed them, as did Aristotle. Tenth-century Islamic astronomer, mathematician, and physicist Ibn al-Haitham observed such images, and through his observations discovered that it is light entering the eyes that causes us to see

First Constructed Cameras

• Al-Haitham is also credited with inventing the first pinhole camera. Observing how light entered the room through a hole in his shutters, he experimented with light and aperture until he could reproduce the effect. The first detailed description of a pinhole camera was made by Leonardo da Vinci, who wrote in the Codex Atlanticus about the pinhole camera he used to study perspective. The first actual photograph with a pinhole camera was taken in 1850 by Scottish scientist Sir David Brewster

Basic Function

• How light enters a pinhole camera, Bob Mellish: Commons.Wikimedia.org
• Pinhole cameras work on the concept of rectilinear propagation of light (rectilinear meaning moving in a straight line). This describes the movement of light rays, which bounce off the camera's subject, and are filtered by the hole. The rays create an image, and not a point of light, because they enter the hole at varying angles. Rays coming upward from the bottom of an object pass through the hole and toward the top of the box. Those coming down from the top of the object go toward the bottom of the box. This is why the image projected on the inside of the camera is inverted

Focus

• The size of the hole affects the focus of the photo taken. If the hole is too large, superfluous light coming through the hole will cause the picture to be out of focus. If the hole is too small, the rays will be diffracted, and the picture will also be out of focus. The best size for the hole in a pinhole camera can actually be calculated by a formula perfected by Lord Rayleigh, British Nobel Prize winner, and published in his book "Nature" in 1891

Characteristics

• Photo of a hydrant taken with a pinhole camera, Matthew Clemente: Commons.Wikimedia.org
• Pinhole cameras are still in use today, despite the ample availability of highly advanced photographic equipment. While images are hard to enlarge, susceptible to chromatic aberrations, and less sharp than those from a camera with a lens, they have an incredible depth of field. A photographer using a pinhole camera adjusts exposure manually, and can take advantage of the limited settings to induce creativity in lighting, subject choice, and composition in her photographs

Package Included:

• 1 x 2.4G 7 Inch Monitor
• 4 x 2.4G Pinhole Cameras
• 1 x Remote Controller
• 2 x Power Adapters
• 1 x Video Cable