The main features and application:
– Anti-Light Pollution
The Antlia Quad Band filter is an effective solution for reducing light pollution, as it cuts out most of the orange-yellow lights from 589nm and part of blue lights from LEDs
– Possible to shoot over 95% of deep sky objects
– Unique spectral design offers more possibilities for astrophotography
– High transmittance of the main emission lines Ha/SII/OIII/H-Beta in the visible region, enhances the astrophotography’s high SNR and contrast;
– Near-infrared (NIR) region transmittance
– Passing near infrared region is for shooting deep sky objects that cannot be shot with other filters without NIR transmission
– The broad bandpass designed to cope with faster optics up to the f/2 focal ratio.
– Good color balance
– It is easier to achieve color balance by adding the short-wavelength transmission
– Superior optical reliability reduces post image processing
– Basic Substrate: Optical, Single / Non-glued substrate
– Surface Quality: S/D (scratch/dig)= 60/40 (Refer to MIL-O-13830)
– Transmitted Wavefront: Lambda/4 or better.
– Parallelism: less than 30 arcsec
– Warranty: 3-years against delamination
Filter Ring:
Antlia standard ring:1.25’’ (M28.5*0.6)，2’’(M48*0.75)
Ultra-thin filter cell to minimize vignetting by maximize possible clear aperture
Black Anodized Finish
Laser Engraving No Fading
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