Focus with Bahtinov Mask

Focusing is the most important step in astronomical observation, but it is always difficult and time-consuming. Through the principle of light diffraction by Bahtinov Mask, small light spots can be turned into easily identifiable graphics, making focusing simple and fast.

Step 1

Get ready with all your imaging or visual gears

Step 2

Point the telescope at a bright star

Step 3

Put on the Bahtinov Mask and you will find that the light spot is divided into three intersecting lines

Step 4

Twist the Focuser Knob to move the middle line to the center

WO Image

Step 5

Take off the mask and your telescope is well focused

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Frequent focusing is required when the temperature changes rapidly.