Antares High Contrast Filters Size:1.25" OIII emission overlaps on blue

OIII emission overlaps on blue and green filters with maximum transmission to allow high efficiency and natural colour imaging

Optical Info Optical Design ED Doublet Lens Coatings Fully Multi-Coated True Aperture (mm) 72 Primary Aperture (mm) 72 F/Ratio 5

Interested in wide-field photography

It has an aperture of 107mm

Antares High Contrast Filters Size:1.25" OIII emission overlaps on blueSpecialty blocking filter: transmits only 480 510nM. M28. 4x0. 6 2UHC 2UHC is a filter that blocks the visual spectrum except for wavelengths between 480nM and 510nM. Often called a Nebular or ALP (anti light pollution) filter, this allow passage of ionized oxygen and hydrogen lines, but blocks light pollution reflectance from mercury and sodium vapor lamps. Threads into all 2" accessories. UHC(1. 25) UHC is a filter that blocks the visual spectrum