Ltl Acorn 850nm, 940nm, 24 and 44 Infra Red (IR) LED arrays compared.

Fig 1:  5210A with 24 IR LED Array

Following on from my previous post which compared the FOV of the new Ltl Acorn 5310 standard and wide angle lens models, this post illustrates the differences in appearance and performance between the old and new infra-red (IR) LED arrays.

Up to now all the Ltl Acorn camera models have used a 24 LED IR light source as shown in figures 1, 2 and 3. Figure 1 shows the 5210A with 24 blue LEDs which emit light in the 940nm wavelength. These LEDs are covert and do not glow when operating.

Figures 2 and 3 show the 24 LED 850nm and 940nm versions. The white LEDs emit light in the 850nm ( nanometer ) wavelength and can be seen to glow red when viewed straight on during operation. They are visible up to 10 plus meters distance and although the IR light emission has double the range of the 940nm version they are not suitable for use in situations where the camera may be vulnerable if observed, such as security applications.

Acorn have now released their 5310 series cameras using their newly developed 44 LED array which doubles the night time light

New Ltl Acorn 5310 series cameras - Standard and wide angle lenses compared

Fig 1: Ltl Acorn 5310A with standard lense

My apologies for the lack of technical posts and reviews over the last few months but I'm just emerging from what I think of as the lost winter. Late last year a nine year old hernia suddenly became much worse and prevented me from doing any more than essential tasks. Restricted walking and no heavy carrying meant I couldn't do winter camera surveying which was a great disappointment and sitting at a computer or workbench for any length of time was not possible.

I eventually had an operation in early February following which I am only now becoming properly active; and still catching up on camera repairs.

Anyway, enough of all that and on to the subject of this post which is a comparison of the standard and wide angle lenses in the new Acorn 5310 trail cameras.

The 5310 also has a larger 940nm IR LED array which doubles the night range to over 60 feet (20 metres) when compared to the 5210 and 6210 cameras at 30 feet.

Figure 1 shows the 5310A with the standard lense and Figure 2 shows the 5310WA with the wide angle lense. Apart from the