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CCTV lenses are an important part of the CCTV system, choosing the correct lenses is vital for all CCTV applications.
Most modern CCTV cameras including Bullet, Dome and Eyeball styles now come with either a fixed focal length lens or a varifocal lens, if you are unsure it is wise to select varifocal as this will be more forgiving during installation/commissioning of the camera.
Typical fixed focal length lenses include 2.8mm or 3.6mm both of which produce a wide angle field of view, ideal for cameras covering a smaller area, i.e. 4 X 4 meters for the 2.8mm and 6 X 6 meters for the 3.6mm.
Typical Varifocal length lenses include 4 - 9mm and 2.8 - 11/12mm. The 4 - 9 lens is simply a medium wide angle to slight telephoto lens, typically giving an horizontal field of view varying from 60 degrees to 30 degrees, the 2.8 - 11 (or 12) is more flexible and will give the camera a typical range of 80 degrees to 20 degrees. Note: all varifocal lenses are set once during commissioning and offer a lossless optical zoom function to allow more flexibility in the siting and location of the camera.
Lenses for C or CS mount cameras
Varifocal lenses as discussed above offer maximum flexibility in camera installations requiring a wide range of focal lengths. Focal length adjustments can be made with a turn of the dial, virtually eliminating the cost and inventory problems associated with improper monofocal lens selection.
Monofocal lenses as discussed above provide fixed focal lengths from super wide angle to telephoto depending on the camera format and intended application. Monofocal Fixed Iris lenses are for fixed lighting applications where cost is the most important consideration
Megapixel Lenses are designed specifically for use with CCD Cameras and video equipment for machine vision applications such as image processing, automated inspection, identification, automated gauging, guiding, positioning and other factory automations. For close-up and macro applications, the MLHX10 and Telecentric lens (TEC-55) are designed for machine vision systems with a wide range of magnification and viewing angles.
Manual Zoom Lenses provide manual adjustment of focal length, iris and focus. For use where variable angle of view is required. Main applications include inspection and robotics.
Motorized Zoom Lenses provide remote control of focal length, iris and focus through the use of a lens controller, used where variable focal length and remote control are required. Applications include long distance surveillance in parking lots, highways, etc.
Pinhole specialty lenses were engineered for the most covert of applications. Where discrete or covert work is needed, Computar offers a range of pinhole lenses 2.5mm up to 9mm (2/3" C-Mount type). The tapered lens tip requires only an 1/8" hole through a wall or ceiling surface.
WELCOME TO Online Security Products. Distributors of professional CCTV since 2007
Online Security Products are authorised UK Distributors for Dahua, Genie, Twilight Pro, Samsung, Cobra, CCTV products and parts
Online Security has unrivalled expertise as distributors to the UK CCTV industry. Online Security supply innovative, high quality and competitively priced CCTV Cameras, IP Video Solutions, NVR and DVR Digital Recording Surveillance Systems.
Online Security Products provide CCTV security solutions from global manufacturers such as Dahua, Genie, Samsung, Cobra, Alien and Nite Devil to trade and professional installers dealing with complex projects and to technically aware end users.
OLSP Limited t/a Online Security Products team have a lifetime of experience working within the electronic security industry, specialising in distribution of CCTV from global brands such as Dahua, Samsung and Genie CCTV.
Online Security Products staff have over 40 years experience in the CCTV industry
OLSP Limited t/a Online Security Products authorised distributors of Dahua CCTV
Online Security Products. suppliers of professional CCTV equipment to CCTV installers across the UK and Europe at low trade prices, one of the leading CCTV suppliers in the UK.
Authorised resellers of Dahua, Genie CCTV, Twilight, Dedicated Micros, Computar, Ganz, Samsung, Vicon, Alien, Cobra, Venom.
Dome cameras, Bullet cameras, Eyball cameras, PCB cameras, Vandal dome cameras, Covert cameras, AHD cameras, HDCVI cameras, IP cameras, HDTVI cameras, DVRs, NVRs, Hybrid DVRs and Security cameras.
OLSP Limited distributes CCTV products from the following manufacturers;
CCTV systems have recently moved from 720 X 576 pixels per frame to 1920 X 1080 pixels per frame (1080P) as a starting resolution, using conventional CCTV co-ax or cat5 cables and called Analogue-HD these CCTV cameras provide 2MP resolution and 16:9 widescreen format. There are competing HD CCTV formats such as AHD, HD-TVI, HD-CVI etc. however most CCTV DVR recorders are multiple format, however you should check that the recorder you select is compatible with the CCTV Camera you like. Alternately there are IP systems available, utilising CCTV NVR Recorders these offer up to 12MP resolution and are increasingly popular due to ease of installation, an NVR with built in PoE simply requires a CAT5 cable between camera and recorder.
Intruder Alarm Distributors
Online Security Products offer a vast range of professional Intruder Alarm parts from many major UK manufacturers including Cooper (Scantronic), Risco, Castle Care, Pyronix, Electronics Line, Texecom.
Intruder alarm systems are designed to protect buildings by making a noise or calling keyholders/police/fire authorities when an intruder, personal attack or fire alarm is activated. Often Intruder Alarm systems are installed to Insurance requirements, these systems are graded and must be designed, installed, commissioned and maintained by a registered company. DIY Intruder Alarm systems are possible for technically aware users, however most manufacturers will not provide any support either for the design, installation, fault finding or repair of a Intruder Alarm system, referring end users to specialist Intruder Alarm installers for this service. If you do choose to DIY an Intruder Alarm system we would recommend the Secuplace kits/parts as they will accept technical support calls for these products, click here for more.
Access Control Distributors
Online Security Products are leading UK suppliers of professional Access Control products at trade prices to Access Control installers.
OLSP Limited Access control systems typically provide control to one or more doors within a building, most systems use RFD fobs or cards to act as tokens giving permission to open a door, gate or barrier to only those who are issued with them, typical access control systems comprise an electric lock, a controller, a reader, a power supply and if their is more than one point may be networked together to manage cards/fobs from a central location i.e. a PC.
Door Entry Distributors
Online Security Products are suppliers of Professional Door Entry systems to the trade at great prices, we supply parts from most leading door entry system manufacturers including CDVI, Aiphone, BPT, Comelit, Videx, Fermax, Bitron.
OLSP Limited t/a Online Security Products Door Entry products typically include an external call point which can be audio only or audio and video, in a standard Door Entry system the external Door Entry call point acts as your doorbell calling audio or audio and video door entry points inside the property, the internal door entry points can operate and electric lock or an electric gate. Variants of Door Entry systems include wireless systems using DECT technology to a dedicated portable handset, or some Door Entry systems utilise GSM to call telephones, most will store multiple numbers and transfer if unanswered to the next number. Some Door Entry systems can utilise WiFi to communicate with tablets and smartphones as well as fixed Door Entry points.
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