4 Piece Eyepiece Lens Set Astronomy Telescope 4mm, 6mm, 12mm, 20mm 1.25" Inch For Sale
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4 Piece Eyepiece Lens Set Astronomy Telescope 4mm, 6mm, 12mm, 20mm 1.25" Inch :
4 Piece Telescope Eyepiece Set
1.25 Inch Standard Size
Internal thread for fitting filters
4mm, 6mm ,12.5mm and 20mm
Come in individual protective cases
4 x Standard fitting eyepieces 4mm, 6mm,12.5mm & 20mm.
This is a very good value set with a 1.25" (31.7mm) barrel size to fit any telescope with a standard 1.25 inch fitting.
Unlike most lenses in this price range they have a thread for attaching filters.
They have coated optics for better transmission and clarity.
Complete with a protective case meaning these are a great addition to any beginner telescope.
What Magnification is this Eyepiece?
The magnification produced by an eyepiece depends on the optical system it is used in.
In a standard astronomical telescope the magnification is found by dividing the focal length of the main tube by that of the eyepiece.
For example, a 1000mm scope tube used with a 10mm eyepiece gives 1000/10 = 100x magnification. Used with a 5mm eyepiece gives 1000/5 = 200x
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