BAHTINOV FOCUSING MASK ZenithStar The exterior of the dew

The exterior of the dew shield is a rigid

7x focal reducer for the TOA-130NS/NFB Ortho-Apo triplet refractors as well as the TSA-120

The lower magnification and the resulting larger field of view make this combination very interesting for images of the surface of moon or sun (the latter only with a suitable solar filter)

1050 g SKU

compatible with Celestron SmartHeat Dew Controllers Compatible scopes 9

BAHTINOV FOCUSING MASK ZenithStar The exterior of the dewThe Bahtinov or focusing mask is a brilliant aid to get a perfect focus. When the telescope is pointed toward a bright star, the mask generates a specific diffraction pattern that makes the focusing procedure easy. Adjust the focus of your telescope till you will see a symmetrical pattern. The mask is laser cut from glossy black acrylic and has slots for the included bolts which makes it possible to clamp it onto either the outside or inside of your