Antlia Filtro H-Alpha 3nm Pro Series (1.23″- 31mm – 36mm – 2″ – 50mm)

Filtro Antlia H-alpha a banda strettissima ,solo 3nm! Ideale per registrare le deboli strutture di nebulose ad emissione anche sotto cieli inquinati.

Utilizzabile su sensori CCD e CMOS in bianco e nero

Technical Specifications:

•  Basic Substrate: Schott optical substrate
• Measured thickness： 2mm+/-0.05mm for 1.25’’, 2’’ mounted, Dia31mm and Dia36mm unmounted
• Measured thickness： 3mm+/-0.05mm for Dia50mm unmounted
• FWHM (Full width at half maximum): 3nm
• CWL (Central Wavelength): 656.3nmnm
• Peak Transmission: ＞90% transmission at H-alpha line 656.3nmnm
• Blocking: > 5 OD(0.001% out of band blocking) @ 300-1000nm
• Surface Quality: S/D (scratch/dig)= 60/40 (Refer to MIL-O-13830)
•  Transmitted Wavefront: Lambda/4 or better.  Parallelism: less than 30 arcsec
•  Single / Non-glued substrate