Author archives: Martin Grigg

Are varifocal lenses zoom lenses?

When designing a system where a range of fixed lenses is just not suitable, one has to turn to manual zoom lenses to get the best field of view. By manual zoom lenses, I mean as op[...]

Where do you start when designing a CCTV system?

To get value for money and an effective CCTV system you must have an understanding of what you need and how to achieve the desired results. The design process for a CCTV system[...]

What is transient suppression and do I need it?

[Image credited to Snowpeak] Modern societies rely heavily on electronics for every aspect of life. From health and economy to entertainment and security. The basic fact about e[...]

Control Rooms

I wrote the following blog about control room design after another frustrating visit to a facility asking “why does my security system not work very well?” All too often I find sys[...]