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
Seamless Magnification Control: A simple twist of the zoom housing adjusts focal length from 8mm-24mm; Ideal for planetary clusters, lunar details, and deep-sky nebulae observation
Extended Eye Relief for Eyeglass Users: 15 to 18 millimeter eye relief; The foldable rubber eye cups also eliminate any stray light; Whether you wear eyeglasses or not; you are guaranteed a good field of view at a comfortable viewing distance
Alstar 1.25" 2.5mm 58-Degree Planetary Eyepiece for Telescope
SAR 261
Alstar 1.25" 15mm Plossl Telescope Eyepiece - 4-Element Plossl Design - Threaded for Standard 1.25inch Astronomy Filters
SAR 105
Alstar 1.25" 6mm Plossl Telescope Eyepiece - 4-Element Plossl Design - Threaded for Standard 1.25inch Astronomy Filters
SAR 79
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
SAR 397
