Derekscope’s basic information

In viewing between methods

• Naked-Eye/Binoculars/Telescopes

Choosing which binocular to buy?

• Suitable for viewing for the Moon.
• Binocular Sizes – which ones?
• My person view
  (recommend a pair of binoculars)

Choosing which telescope to buy?

• Aperture

Types of telescopes

• Refractor
• Reflector
• Cassegrains

O
O

Types of eyepieces

How to read a
telescope magnification?

• Formula for calculating the eyepiece
  O
• Telescope Eyepieces
  O
  Field of Views
• 30mm / 25mm / 13mm