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Useful Links

As you can see this is a pretty new section, so please help us to fill it up with good links...

Our customers
Please let us know if you have your own website with photos of birds, bears, foxes, microscopic creatures or macroscopic beauties such as stars, nebulae, galaxies or similar... or alternatively you may upload your best photos onto our

Frequently do our customers send us their photos that we would upload to our Facebook page:

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of educational institutions: 

With the kind permission of David Campbell here is a link to his excellent field of view calculator that allows you to calculate the field of view of wide range of optical instruments. There are two modes: visual and imaging. In visual mode you may choose a telescope and a
digital camera, whilst in visual mode you may choose a telescope and an eyepiece. In both modes you have the ability to add a Barlow lens or a focal reducer.

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