TESTAR 50mm GUIDE SCOPE ZWO Lens A great alternative use of

A great alternative use of your camera lenses for wide field astrophotography

or any flat surface

The PLUS tube rings from Prima Luce Lab are a perfect match to securely mount your ZWO cooled deep sky cameras when using a camera lens that doesn't have a traditional dovetail mounting system

Clip-in filter installation instructions

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TESTAR 50mm GUIDE SCOPE ZWO Lens A great alternative use ofThe Testar 50mm Guide Scope has a focal length of 190mm and a focal ratio of f 3. 8. The objective is a fully multi coated achromatic doublet for a greater optical precision. The border of the lenses are blackened to deliver a higher contrast. The 69mm support rings have 3 screws with a nylon tip for a perfect alignment with the main telescope. Having the guide scope aligned to the main telescope increases the guiding accuracy and it reduces the field