Enhance your astrophotography with the Astronomik OIII 6nm Narrowband Filter. Designed to isolate the OIII spectral line at a precise 6nm bandwidth, this filter effectively captures elusive nebulae details while minimizing light pollution and atmospheric interference. Elevate your imaging of emission nebulae and reveal the intricate structures of the cosmos. Compatible with various telescope setups, the Astronomik OIII 6nm Narrowband Filter is your gateway to breathtaking celestial photography.

The OIII-CCD Filter is suitable for imaging of OIII nebulas from observation sites with light pollution and from dark sites as well. The contrast between an object glowing at 501nm and the background is increased enormous!

Due to the combination of the narrow bandwidth of 6nm and the high transmission of close to 100%, the filter gives you an enormous contrast boost, as all unwanted light from other wavelengths than <xx> is blocked form UV up to the IR. This results in an extremely dark background.
The FWHM of 6nm is matched to give you optimal performance with CCD and CMOS sensors with a very low dark current! The 6nm filter is the best choice if you are observing from a heavily light polluted site or if you are imaging faint objects in star crowded regions of the Milky Way. 

Due to the new MFR coating technique you may use one single filter on all instruments up to f/4 without a significant reduction in performance.

The Astronomik H-alpha filter MUST NOT BE USED for solar observation!

Specifications

• Guaranteed Transmission of more than 88% at the OIII Line (501 nm)
• Typical Transmission of 92...95% at the OIII Line (501 nm)
• Full-Width-Half Maximum (FWHM): 6nm
• Perfect blocking of unwanted light from UV up to the IR
• Parfokal with all Astronomik filters
• MFR Coating technique: Usable with all optics up to f/4
• Thickness of 1mm
• Not sensitive to moisture, scratch resistant, not aging
• Optically polished substrate, striae-free and free of residual stresses
• High quality storage box