Alstar 2 Inch 2X 4-Element Barlow Lens - Bundle with - 2" Telescope Moon Filter Kit

As its name implies, the High-Power 2" 2x Barlow doubles the magnifying power of any 2" eyepiece, essentially dividing the eyepiece's focal length by a factor of 2. For example: using a 42mm eyepiece in the High-Power 2x Barlow provides the same magnification you'd normally get from a 21mm eyepiece (42 / 2 = 21). Using this simple formula, you can easily determine how each of your 2" telescope eyepieces will perform when inserted in the High-Power 2x 4-Element Barlow Lens. An included 2"-to-1.25" step-down adapter allows use of both smaller 1.25" eyepieces and big 2" oculars with the versatile Orion High-Power 2" 2x Barlow Lens.

• 4-Element: This big 4-Element 2x Barlow will give your 2 inch telescope eyepieces a power-doubling magnification boost
• Fully Multi-Coated Lens Design:This means your power-boosted observations will be optimized in regards to sharpness clarity and brightness for a great viewing experience
• Neutral density filters are excellent filters to reduce the overall brightness of an image to cut down glare while viewing bright astronomical objects through a telescope
• These three ND moon filters are useful for splitting binary systems; comfortably observing the moon; or stacking with other planetary filters
• ND filters retain true color balance of the objects being observed since all wavelengths are transmitted uniformly over the entire spectrum