Celestron AstroMaster 90EQ Refractor Telescope User Manual

1. บทนำ

The Celestron AstroMaster 90EQ is a refractor telescope designed for both astronomical and terrestrial observation. It features 90mm fully-coated optics, providing clear views of celestial objects such as the Moon, planets, and brighter deep-sky objects, as well as land-based targets. This manual provides instructions for the assembly, operation, and care of your telescope to ensure optimal performance and longevity.

Image 1: The Celestron AstroMaster 90EQ Refractor Telescope, fully assembled on its equatorial mount and adjustable tripod.

2. อะไรอยู่ในกล่อง

ตรวจสอบว่าส่วนประกอบทั้งหมดอยู่ครบก่อนเริ่มประกอบ:

• หลอดแสง
• Tripod and equatorial mount (preassembled)
• 20mm eyepiece
• 10mm eyepiece
• กล้องค้นหาจุดสีแดง StarPointer
• คู่มือการใช้งาน (เอกสารนี้)

3. คำแนะนำในการตั้งค่า

Assembly of the AstroMaster 90EQ is designed to be straightforward and tool-free. Follow these steps for initial setup:

1. การตั้งค่าขาตั้งกล้อง: Spread the tripod legs outward until they are fully extended. Secure the accessory tray to the center brace of the tripod. Adjust the leg height to your desired viewing position using the leg clamps.
2. การติดตั้งท่อเลนส์: Locate the dovetail bar on the optical tube. Slide this bar into the dovetail clamp on the equatorial mount. Tighten the clamp knob securely to prevent the tube from slipping.
3. การแนบ Finderscope: Slide the StarPointer red-dot finderscope bracket into the receptacle on the optical tube. Tighten the small screw on the receptacle to hold it in place. Ensure the battery is correctly installed in the finderscope.
4. การใส่เลนส์ตา: Loosen the thumbscrew on the diagonal (the angled piece at the end of the optical tube). Insert the desired eyepiece (e.g., 20mm for lower magnification) into the diagonal and tighten the thumbscrew to secure it.
5. Balancing the Mount: For an equatorial mount, proper balance is crucial for smooth tracking. Adjust the counterweight along its shaft until the telescope is balanced in Right Ascension (RA). Similarly, adjust the optical tube within its dovetail clamp until it is balanced in Declination (DEC).

4. คู่มือการใช้งาน

Once assembled, follow these steps to begin observing:

1. การจัดแนว Finderscope: Before using the telescope, the finderscope must be aligned with the main telescope. Point the main telescope at a distant, stationary object (e.g., a streetlight during the day). Look through the finderscope and adjust its alignment screws until the red dot is centered on the same object that is visible in the main telescope's eyepiece.
2. การโฟกัส: Once an object is centered in the eyepiece, turn the focus knob slowly until the image appears sharp and clear.
3. Using the Equatorial Mount:
   • การจัดตำแหน่งขั้วโลก: For astronomical tracking, roughly align the mount's polar axis with Polaris (the North Star) in the Northern Hemisphere. This allows for easier tracking of celestial objects.
   • การติดตาม: After polar alignment, celestial objects can be kept in view by turning only the Right Ascension (RA) slow-motion control knob. This compensates for the Earth's rotation.
4. เคล็ดลับการสังเกต:
   • Start with the lowest magnification eyepiece (20mm) to locate and center objects.
   • Switch to higher magnification (10mm) for more detailed views once the object is centered.
   • Allow your eyes to adapt to darkness for better night sky viewการไอเอ็นจี
   • สำหรับภาคพื้นดิน viewing, ensure the 90° erect image diagonal is used to provide a correctly oriented image.

5. การบำรุงรักษา

Proper care will extend the life and performance of your telescope:

• การทำความสะอาดเลนส์: Use a soft, lint-free cloth or a specialized optical cleaning kit. Avoid touching optical surfaces with bare hands. Dust can be removed with a camel hair brush or compressed air.
• การดูแลทั่วไป: Keep the telescope covered when not in use to protect it from dust and moisture. Store it in a dry, temperature-controlled environment. Avoid exposing the telescope to extreme temperature changes.
• ชิ้นส่วนเครื่องจักร: Periodically check all screws and knobs for tightness. Do not overtighten.

6 การแก้ไขปัญหา

หากพบปัญหา โปรดดูวิธีแก้ไขทั่วไปเหล่านี้:

• ภาพเบลอ: Adjust the focus knob slowly. Ensure the eyepiece is fully inserted and secured. Check for condensation on the optics.
• ไม่พบวัตถุ: Verify that the finderscope is properly aligned with the main telescope. Start with the lowest magnification eyepiece. Ensure the lens caps are removed.
• Telescope wobbles: ตรวจสอบให้แน่ใจว่าขาตั้งกล้องทุกตัวอยู่ในตำแหน่งที่ถูกต้องamps and mount knobs are securely tightened. Extend the tripod legs only as far as necessary for stability.
• Red dot finderscope not working: Check the battery. Ensure the power switch is on.

7. ข้อมูลจำเพาะ

8. การรับประกันและการสนับสนุน

The Celestron AstroMaster 90EQ Refractor Telescope is backed by a รับประกัน 2 ปีในสหรัฐอเมริกา. For technical assistance, support, or warranty claims, please contact Celestron's US-based customer support team. Further information can be found on the official Celestron webเว็บไซต์.

For additional resources and astronomy software, visit the ร้าน Celestron บน Amazon.