ATIK Instruments OAG Off Axis Guider with Moveable Prism

As a complement to the filter wheel, ATIK also developed an Off Axis Guider, which features just about everything needed to successfully use this kind of guiding system. It features a moving prism which allows selecting the best quality stars of your corrected field of view, while maintaining the possibility of using from small VGA sensors up to 35mm multi megapixel full frame beasts.

It also features an extremely smooth and precise fine focus system, with extension rings of 3 different lengths, so that different types of cameras reach focus with different types of autoguiders. The OAG interfaces perfectly with the EFW2, meaning that no spacing exists between both units, keeping total back focus requirements low.