Filter OIII 3nm - Antlia Pro

The 3nm OIII filter can be used in areas with a lot of light pollution to be able to obtain a very well contrasting image and perfectly centered in the wavelength of 500.7 Nm.
The narrow band width of Antlia has an extremely high transmission which allows you to have a higher contrast and simultaneously reduce the light pollution resulting from the emission of artificial lights of sodium and mercury.
The T is kept stable at 500.7 Nm with an 85%signal, where the filter becomes more sensitive to the spectrum in order to guarantee the best signal-outlet ratio and an OD3 cutting frequency (0.1%) is necessary to reduce interference of other wavelengths.

The OIII filter is generally used to photograph the emission nebulae, the planetary nebulae, can easily highlight the details of the OIII of these objects.

A narrow 3nm strip for your CMOS

Antlia has developed the 3NM Ha-Oiii-SII series as well as the LRVB series thinking of the new generation of CMOS cameras, as well as the use of short opening reports, up to F / 2.0.

The narrow strip of these filters is very narrow, only 3 nm, it is therefore recommended to use these filters on large diameter telescopes, telescopes with a high focal ratio or to take a long shot to obtain enough signal Affin to obtain the maximum details of the objects.

Main use and performance

They work very well with the monochrome or CCD and CMOS color sensor, CMOS sensor is recommended.
Suitable for the imagery of the deep sky of emission nebulae, planetary nebulae and vestiges of supernovas

Transmission of virousisima, more than 85%

Technical specifications:

•     Basic substrate: optical substrate
•     Filter thickness: 3mm +/- 0.05mm for dighe50mm not mounted
•     FWHM (total width in mid-maximum): 3nm
•     CWL (central wavelength): 500.7NM
•     Maximum transmission:> 85%
•     Blocking:> 5 OD (0.001% band blocking) @ 300-1000NM
•     Surface quality: S / D (Scratch / DIG) = 60/40 (see MIL-O-13830)
•     Transmitted wave front: lambda / 4 or better.
•     Parallelism: less than 30 arcsec
•     Single / unlined substrate