TESTAR 50mm GUIDE SCOPE ZWO Lens the writing speed of your

the writing speed of your computer is slow or occupied with other processes

Clip-in filter installation instructions

The ZWO ASI 294MC contains the Sony IMX294CJK CMOS colour sensor that offers 14bit

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

or any flat surface

TESTAR 50mm GUIDE SCOPE ZWO Lens the writing speed of yourThe 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