Please do not use "post comments" to ask for camera help and advice. Use phone or Skype IM in the first instance.

Updates and posts to this web site are delayed due to ongoing problems I am having with internet access. This is because of the degradation of the existing phone line infrastructure which it is hoped will be upgraded by the spring of 2017.

Sunday, 15 June 2014

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

Monday, 2 June 2014

First whale week festival spotlights western Scotland’s internationally important marine life

Minke whale in Hebridean waters / HWDT
A new annual week-long festival boosting the profile of The Hebrides as an internationally-important hotspot for whale spotting and conservation action will be launched on World Oceans Day on 8 June, in what is believed to be the first event of its kind in Scotland.
 
Humpback whales, orcas and bottlenose dolphins will take over Tobermory on the Isle of Mull between 8-15 June 2014, as conservation charity Hebridean Whale and Dolphin Trust (HWDT) celebrates its 20th anniversary with its
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This web site is about the wildlife, particularly the mammals, of the Glen Affric National Nature Reserve area in the north west Highlands of Scotland, UK; and the equipment I use to search for them, which is chiefly trail cameras.

I provide a technical support and parts service for the Ltl Acorn range of cameras and the income from this provides for the upkeep of this site and the purchase of cameras for my own surveying.

I hope you find the site useful and informative; and please contact me if you have any questions that I haven't already covered.