ANTLIA 3nm Narrowband H-Alpha Pro Filter 50mm Square Unmounted

Description

Brand: ANTLIA

Features:

• Basic Substrate: Schott optical substrate
• Filter Thickness: 3mm+/-0.05mm
• FWHM (Full width at half maximum): 3nm
• CWL (Central Wavelength): 656.3nmnm
• Peak Transmission: ＞88%
• 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

Details:

The Antlia 3nm Narrowband H-Alpha Pro Filter is a premium choice for astrophotographers seeking exceptional image quality. Crafted with a Schott optical substrate, this 50mm x 50mm square unmounted filter boasts a precise 3mm thickness with minimal variance, ensuring consistent results. With an impressive Full Width at Half Maximum (FWHM) of just 3nm and a Central Wavelength (CWL) of 656.3nm, it excels in isolating H-Alpha emissions for outstanding contrast and detail. Achieving over 88% peak transmission, it effectively captures faint celestial details while maintaining superior blocking of out-of-band wavelengths (>5 OD). The filter’s surface quality and transmitted wavefront specifications adhere to rigorous MIL standards, ensuring durability and clarity. Its single, non-glued substrate design, combined with exceptional parallelism, makes this filter a reliable and precise tool for capturing the wonders of the night sky.

UPC: 782917932291