More on Amazon.com : http://www.amazon.com/gp/product/B004PJN1SU?tag=thefatkidin06-20 <br /> <br />Baader Planetarium UV IR-Cut Telescope Filter 2 FUVIR-2 <br /> <br />Unmatched 98 Average Transmission Freedom from ghost images very low reflection multi-coating S <br />Extremely Sharp Cutoff at 680nm leaves all the visible red including the important 656nm H-alpha <br />Sharp cutoff below 420nm Eliminates violet halos around bright stars more effectively than simple <br />True optical quality glass substrate and coatings Why spend all your money on quality primary optic <br />Combine with any of the other Baader filters to deliver the sharpest images possible
