A 2x barlow fits in-between the telescope and eyepiece and doubles the eyepiece magnification. 

This compact 1.25” BST StarGuider 2x barlow with fully multicoated 3-element air-spaced optics features enhanced colour correction, high contrast and excellent light transmission. 

It's compact size makes it suitable for use not only with Newtonians but also telescopes fitted with a diagonal such as refractors and Schmidt-Cassegrains. 

It also has 26mm clear aperture so can be used with long focal length eyepieces with minimal vignetting. 

The sturdy anodised aluminium body uses an anti-marring brass compression ring and thumbscrew to grip the 1.25” eyepiece securely. The smooth-sided nosepiece is threaded to accept 1.25” astronomy filters. 

Eyepiece Field of View Simulator

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