Unless selecting a vari-focal camera (with an adjustable lens) It is important to select the correct camera lens option for where the camera is to be positioned. A smaller lens will give you a wider angle but will be "zoomed out more", while a bigger lens will narrow the angle down and "zoom in more". See below to give you some idea on angles of Megapixel HD Cameras:
| Lens in mm | Approx Viewing Angle (degrees) | Ideal Distance (metres) | Typical usage/notes |
|---|---|---|---|
| 2.8 | 106 | <6 | For seeing as much of the immediate area as possible such as above a doorway/low down/garage soffits (edges can appear slightly warped/distorted) - clearly "zoomed out" |
| 3.6/4 | 83-90 | <12 | A great general purpose option giving great coverage still in the corner of a room or higher up on second floor soffits with less distortion - more of a natural "zoom" |
| 6 | 56 | 6-20 | Narrows down the angle and zooms in to look past the immediate area a little to gain more detail - down a driveway for example from higher up |
| 12 | 24 | 20+ | Zooms in significantly more to look at a gate, entrance or adjascent building |
| 16 | 19 | 24+ | As above but more so |
The amount of hard drive space you require is dictated by how many cameras, as well as their resolution and frame rate settings. Finally you can often make your storage space last a lot longer by enabling motion detected recording rather than continuous, especially if there are long periods of no activity.
|
Resolution (Megapixels) |
Days of storage provided by 1TB per camera (continuous - full 25 frames per second) |
Days of storage provided by 1TB per 4 cameras (continuous - full 25 frames per second) |
Days of storage provided by 1TB per 4 cameras (50% motion- 15 frames per second) |
|---|---|---|---|
| 1 | 44 | 11 | 36 |
| 2 | 22 | 5 | 18 |
| 3 | 17 | 4 | 14 |
| 4 | 11 | 3 | 9 |
| 5 | 9 | 2 | 8 |
| 6 | 8 | 2 | 6 |
| 8 (4K) | 5 | 1 | 4 |
| 12 | 4 | 0.5 | 3 |
As a rule of thumb we recommend a minimum of 2 Terabytes per 4 x 2-4MP HD cameras, as this should give you 2 weeks to a month with a few adjustments on motion detected recording. You may only require the full 25 frames per second on certain cameras if things are fast moving.
(All of our hard drives come fitted and are CCTV specific from one of the major brands)
The HiWatch by Hikvision THC-B220-M is the 2 MegaPixel HDTVI Turret dome from the new HiWatch range and includes many of the features associated with Hikvision's commercial 'trade only' ranges such as digital noise reduction. The 2 MegaPixel sensor provides exceptional pin sharp images and the IR illumination allows for up to 40 metres of imaging in pitch black viewing conditions. The B220 has an ingress protection rating of IP67, making it a completely weatherproof CCTV camera.
Remote viewing is available using the Hik-Connect application for mobile or IVMS4200 for desktop applications.
| Camera | ||
|---|---|---|
| WDR (Wide Dynamic Range): | DWDR | |
| Image Sensor: | 2MP CMOS Image Sensor | |
| Signal System: | PAL/NTSC | |
| Effective Pixels: | 1920(H)*1080(V) | |
| Shutter Time: | 1/25(1/30) s to 1/50,000 s | |
| Lens Mount: | M12 | |
| Adjustment Range: | Pan: 0°to 360°, Tilt: 0°to 180°, Rotation: 0°to 360 | |
| Day& Night: | IR cut filter with auto switch | |
| Video Frame Rate: | 1080p@25fps/1080p@30fps | |
| HD Video Output: | 1 Analog HD output | |
| Synchronization: | Internal Synchronization | |
| Lens | ||
|---|---|---|
| Horizontal Field of View: | 103° (2.8 mm), 80.7° (3.6 mm), 50.1° (6 mm) | |
| Menu | ||
|---|---|---|
| D/N Mode: | Auto/Color/BW (Black and White) | |
| BLC: | Support | |
| AGC: | High/Medium/Low/Off | |
| Language: | English | |
| Function: | Brightness, Sharpness, DNR, Mirror, Smart IR | |
| General | ||
|---|---|---|
| Material: | Metal | |
| Operating Conditions: | -40 °C - 60 °C (-40 °F - 140 °F) Humidity 90% or less (non-condensing) |
|
| Power Supply: | 12 VDC±15% | |
| Power Consumption: | Max. 4 W | |
| Weather Proof: | IP66 | |
| IR Range: | Up to 40m | |
| Dimension: | 75.4mm × 230.8 mm × 87.2 mm (2.97" ×9.09" × 3.43") | |
| Weight: | 545 g (1.20 lb.) | |
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