หอสังเกตการณ์, กล้องส่องทางไกล, กล้องโทรทรรศน์, ภาพ, วิสัยทัศน์, ไกล, มุมมอง, ระวัง, ท้องฟ้า, ดู, ทัศนียภาพ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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