Ostara 1.25'' 27mm Eyepiece Flat Field for Telescope [H111905]

• The Ostara range of Flat eyepieces provide excellent value for money with high optical and build quality
• Fully multi-coated to reduce reflections with standard astro 1.25" fitting
• Flat Field eyepieces provide a wide field of view keeping stars, planets and lunar details in focus across the field of view.
• A 27mm is considered a medium power eyepiece with a wide field.

Product description 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. Legal Disclaimer A 19mm is considered a medium to high power eyepiece.