100mm Ha Etalon Filter with B1200 for 2" Focuser - LS100FHa2/B1200 Jansale A great first step into

A great first step into the world of serious

TeleVue Product Number: RS4-8004

One aspect to optimizing this correction is the distance of the telescope eyepieces focus point (field stop location) to the last surface of the Paracorr lens (within a small +/- tolerance of course)

Now you can use your Dioptrx astigmatism correction accessory on all your Nagler Type 6 eyepieces

Advanced Narrow Band Hydrogen-alpha Dedicated System

100mm Ha Etalon Filter with B1200 for 2" Focuser - LS100FHa2/B1200 Jansale A great first step intoAbout the Lunt 100mm Ha Etalon Filter w B1200 for 2" Focuser This product number is for the Lunt H alpha Single Pass Front Mount Etalon System for telescopes with 2" focuser and up to 1080mm focal length. Introducing the Lunt LS100 Hydrogen alpha System a 100mm aperture integrally tuned etalon for use on any customer supplied refractor. System includes the B1200 blocking filter which provides full disk images on telescopes up to 1080mm focal length.