Collimating a telescope like the Celestron Astromaster 114AZ involves aligning the optics to ensure optimal performance and clear images. Here’s a step-by-step guide:
Gather Tools: Before beginning, ensure you have the necessary tools—a collimation cap, a Phillips screwdriver, and, optionally, a laser collimator for more precise alignment.
Setup the Telescope: Place your telescope on a stable surface. It’s easier to make adjustments when the telescope is not wobbling.
Check the Eyepiece Holder Alignment: Ensure that the eyepiece holder is properly aligned. If using a laser collimator, insert it in the eyepiece holder. Turn it on to check if the laser hits the primary mirror’s center. Adjust the secondary mirror to correct any misalignment.
Secondary Mirror Adjustment: The secondary mirror should be centered under the focuser and appear circular if viewed through the focuser without an eyepiece. Use the screws on the secondary mirror holder to adjust its tilt. The goal is to have the secondary mirror centered and the entire primary mirror visible within it.
Primary Mirror Collimation: Adjust the primary mirror using the collimation screws at the back of the telescope. Most Celestron models have three screws to adjust for tilt. Using a collimation cap or laser, tweak the primary mirror screws until the reflection of the secondary mirror is centered.
Final Check: After adjustments, perform a star test. Point your telescope at a bright star and slightly defocus the image. If the collimation is correct, you should see concentric rings of light. If not, repeat the collimation process.
Perform the collimation process in a bright room first, then fine-tune under a clear night sky. Regular collimation ensures that your telescope delivers clear and sharp astronomical images.