Astromania Barlow Lens 2X, 2 Inch Barlow Lens Fully Multi-Coated Metal for Telescopes Premium Dual Power ED Glass Telescope Accessory with Internal Brass Ring for 2 inch & 1.25 inch Telescope Eyepiece

More aperture provide good image with high contrast; ED glass means visible colour aberrations are reduced to minimum with sharp image; all lens surfaces have been provided with multi coated to reduce reflections. For astrophotography; sometimes more focal length is required in order to be seen at a reasonable size in the image especially for compact objects; there is also no shadowing apparent on small image format camera chips for big plus. Larger diameter has more scope for lenses: 2 inch diameter allows to insert 2 inch eyepieces into this barlow with double magnification; the large lens diameter also means you will notice no shadowing in the image. Ergonomically designed: clear starry nights can be cold in summer means there is no choice but to wrap up warmly; has been designed with high grip exterior to provide a good grip means it is easy to handle securely even with gloves on. Simply be unscrewed and then screwed into any 2 inch eyepiece; This Barlow element is correctly threaded for this purpose; 2 inch filter thread provided on the lower part of the barlow and on the reducer adapter for using filters