ANTLIA Ha 3nm PRO ULTRA NARROWBAND FILTER IR-Cut the counterweight is provided with

the counterweight is provided with a not-protruding set screw

flat field for astrophotography

Like PlaneWave's half-piers

30A065BK (black)

Every OIII filter is marked with its unique serial number and individual passing band certificate

ANTLIA Ha 3nm PRO ULTRA NARROWBAND FILTER IR-Cut the counterweight is provided withThe Antlia H Alpha 3nm PRO ultra narrowband filter boosts the contrast of emission nebulae and supernova remnants for professional results, even under a bright sky affected by light pollution. The 3. 0 nm band pass is only 1% of the entire visible spectrum, increasing the signal to noise ratio and delivering high contrast images and extremely dark backgrounds. To even further enhance the contrast, and suppress the stray light and internal reflections,