ANTLIA 2.5nm ULTRA NARROWBAND 2" SET Ha + OIII + SII BA20 Orion and other Newtonians and

Orion and other Newtonians and Dobsonian telescopes with secondary mirrors glued to holders in form of a stalk of almost the diamater of the secondary

Use the rotary knob 2 to switch between the rear port 3 and the top port 4

SKU CE-94241

the azimuth and altitude axis can be fine adjusted for a precise polar alignment

Greenline observatories are fumigated but the wood is not treated

ANTLIA 2.5nm ULTRA NARROWBAND 2" SET Ha + OIII + SII BA20 Orion and other Newtonians andThe Antlia 2. 5nm Ultra narrowband 2" filters have a FWHM (full width half maximum) of an incredible 2. 5nm +0. 3 0. 1nm and a high transmission efficiency of > 92 95% at the central wavelength. These filters are made from quartz glass which has an ultra low thermal expansion coefficient and outstanding thermal and mechanical properties. Utilizing Antlia's precisely controlled advanced coating process, these filters are exceptionally durable and can