ED Glass Element: The Alstar 2 inch Barlow lens utilizes ED glass to minimize visible chromatic aberrations; thereby significantly enhancing image clarity; Additionally, all lens surfaces are coated with a green multi-layer coating to effectively reduce reflections and improve overall optical performance
Large Lens Diameter: The 2 inch diameter also allows you to insert your 2 inch eyepieces into the Barlow lens doubling their magnification; The large lens diameter also means you will notice no shadowing in the image
Doubles the Focal Length: The Barlow lens can also be utilized for astrophotography; In particular when observing compact celestial objects a longer focal length may be necessary to ensure they appear at an appropriate size in the image; A significant advantage is that no shadowing occurs on camera sensors with smaller image formats
Standard 1.25 Inch Barrel and Thread: Compatible with any telescope equipped with 1.25 inch focuser and the 1.25 inch female thread can also be connected with 1.25 inch telescope filter or other 1.25 inch telescope accessories; Whether for planetary observation or deepsky exploration this eyepiece delivers sharp and clear images meeting your high standards for stargazing
Multi-coated Lense Design: Each eyepiece has 5 lens elements in 3 groups; Experienced observers will appreciate at significant magnifications; Exceptional at nearly eliminating lateral color aberration
Alstar 1.25" 2.5mm 58-Degree Planetary Eyepiece for Telescope
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Alstar 9x50 Angled Finder Scope, Black - You Will no Longer Need to Strain Your Neck at Difficult Angles and are Also able to Search for Objects which are not so Easy to find
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Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 80mm - with Standand 2-Inch Filter Threads
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