Tilt Adjuster is only included with:
- Pleiades Series
- Cat Series
For the new STX adjusting, please refer to Sensor Tilt Adjustment (STX)
Identify the Tilt Direction
First, let's examine a sensor with no tilt.
After achieving focus, if the camera sensor is positioned too far from the optical plane, star shapes will appear elongated in the tangential direction—stretching around the center of the frame.
Conversely, if the sensor is too close, the stars will stretch in the sagittal (radial) direction—pointing toward or away from the center.
▼ Sensor Too Far Away
▼ Sensor Too Close
Next, analyze the star field images taken with your current setup.
Identify the region where the stars are in best focus and appear round, as well as the area where star distortion is most severe. This comparison allows you to roughly map the direction and position of the sensor tilt axis. Based on the distortion pattern, you can then infer whether the sensor is positioned too close to or too far from the focal plane in that specific region.
Example A
Stars in the lower right are round, while those in the upper left show strong sagittal (radial) elongation—indicating the sensor is too close in that area.
Example B
Stars at the top are sharp and round, while those in the lower left show strong tangential elongation—indicating the sensor is too far in that area.
Tilt Adjustment
- Locate the pair of diagonally opposing screws corresponding to the affected corners.
Where is the tilt adjuster?
1. Remove the rotator knob.
2. Remove the ring cover.
3. The tilt adapter is inside.
- Use the 2mm hex key to loosen the pull-in screw of the screw group closest to side where stars appear too close, and loosen the push-out screws of the group on the opposite side (too far).
- Adjust the push-out screws in the "too close" group and the pull-in screw in the "too far" group until the tilt is corrected.
- Gently snug all screws to hold the final position.
Note
- Make small adjustments at a time—1/8 turn is recommended for fine control.
- Adjust other screws if necessary to maintain overall balance.
- If the tilt becomes worse or is severely misaligned, perform a reset:
1. Loosen all push-out screws
2. Tighten all pull-in screws fully
3. Back out each pull-in screw by the same number of turns
4. Begin tilt adjustment again from this neutral position