100mm Ha Etalon Filter with B1200 for 2" Focuser - LS100FHa2/B1200 Jansale One aspect to optimizing this

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)

About the Explore Scientific 3" Field Flattener

wildlife studies

TeleVue Product Number: RS4-8004

100mm Ha Etalon Filter with B1200 for 2" Focuser - LS100FHa2/B1200 Jansale One aspect to optimizing thisAbout 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.