Baader Narrowband CCD Filters.

CCD imagers will find Baader's new Narrowband CCD passfilters to deliver the absolute
highest contrast deep sky images in H-Alpha, H-Beta, Oxygen III, and Sulfur-II, with the
shortest exposures possible. Their ultra-narrow bandwidths have extremely high
transmissions, while completely rejecting light pollution as well as the important blocking of
longer wavelengths.

The high optical quality of the Baader narrowband filters guarantees no loss in sharpness or
contrast. Each substrate is fine-optically polished plane parallel to deliver a smooth and
accurate 1/4 wavefront over the entire surface. This special custom polishing operation sets
Baader filters apart from the standard commercially precision polished filter substrates used
by most other filter manufacturers. Coatings are professionally applied by the most
sophisticated equipment available, ensuring high consistency for bandpass centering and
transmission. The ultra-hard ionbeam deposition ensures the coatings will never degrade
from use or normal cleaning.

These filters are available in three sizes, standard 1¼", 2", and a 50.8mm diameter bare
substrate (unmounted) for use in SBIG STL cameras.

Prices:
Baader Narrowband 7nm H-Alpha Filter, 1.25" - £99.00
Baader Narrowband 7nm H-Alpha Filter, 2" - £163.00
Baader Narrowband 8.5nm H-Beta Filter, 1.25" - £70.00
Baader Narrowband 8.5nm H-Beta Filter, 2" - £154.00
Baader Narrowband 8.5nm O-III Filter, 1.25" - £80.00
Baader Narrowband 8.5nm O-III Filter, 2" - £121.00
Baader Narrowband 8nm S-II Filter, 1.25" - £80.00
Baader Narrowband 8nm S-II Filter, 2" - £125.00

The Astronomy Shop

1 Tone Hill. Wellington

Somerset TA21 0AU

United Kingdom

Telephone: +44 (0)1823 665510