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 Challenger Gen 2 + NVG 1x21 Series comprises several models, the key difference being the performance offered by their respective image intensifier tubes.
There are two factory fitted variants, the Challenger G2+ 1x21 and the Challenger G2+ 1x21(B). There are also numerous image intensifier tubes that can be fitted into this bodyshell giving it impressive customisation potential.
The Challenger G2+ 1x21(B) has all the features of its less expensive GS counterpart but has superior performance characteristics due to the higher resolution and sensitivity of its Russian EPM223G-11-26V image intensifier tube.
The Challenger G2 1x21 is similar to the G2+ 1x21(B) but offers further performance improvements due to the higher sensitivity and resolution of its Russian EPM207G-11-13B Gen 2+ or Photonis Gen 2+ series image intensifier tubes. This product is available with a choice of intensifier tubes and is supplied with a light, adjustable headmount.
There are 10 different Photonis Gen 2+ intensifier tubes available. Parts for this range are in stock and assembled to order. Delivery date for custom solutions is advised at the time of order.
• Water and dust resistant
• IR illuminator
• Flexible carrying case
• Built in tripod socket
• Hand-held & hands free use
• Twin switch operation
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