Very often the camera's infrared LED’s can play havoc with the quality of your night images. Manufacturers have taken very careful steps to avoid the problem. There are ways to combat these issues but sometimes you may need to take additional steps. This can include some very simple things like simply keeping the plastic dome bubble clean!
If however, you are finding that the camera has a very good picture by day but has blurry artefacts by night and is clean you may need to take additional steps. Firstly make sure that the foam lens surround is in place. The purpose of the foam ring is to avoid the issue by stopping the IR light leaking directly into the lens as opposed to bouncing off what the camera is looking at which is what you want.
Secondly the IR light can reflect off nearby surfaces this can happen from any nearby surface. UPVC is especially bad for this. You may need to reconsider the position of your CCTV camera but sometimes just a simple tweak of the cameras viewing position will remedy the problem.
There are other common issues that can cause a blurry image which persists during the day but are still more visible at night, like a lens that is not focused correctly. This mostly occurs with cameras that have an adjustable "varifocal" lens. It is worth noting that this can also happen with a fixed lens camera, especially if the camera has been subject to a drop or heavy impact.
Implementing all of the above should remedy all but the most stubborn of issues however if you are still finding issues with your system you can contact us for a site visit and evaluation. Sometimes artefacts on the video signal could be a fault with the camera. We can verify this and advise the best course of action.
