books عدسة هاكرا
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# How do I choose the camera lens?
# How do I clean the camera lens?
# John Hackra's discoveries
# How do you think like a hacker?
# How do I become a hacker?
# How do you think like a hacker?
# lens focus
# eye lens
# objective lens
# Contact lens
# composite lens
# crystal lens
# zoom lens
# Lens disorders
# Mother of the Euphrates lens
# Mother of Khalili lens
# Umm Ajami lens
# gravity lens
# convex lens
# concave lens
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Source: wikipedia.org
عدسة هاكرا (Info)
عدسة هاكرا هي نجم زائف، تتبع كوكبة الفرس الأعظم. اكتشفها جون هاكرا في 1985.
