Filters

Filters

The variety of uses for filters in amateur astronomy has considerably increased during the last decade, enabled by both more accurately manufactured optical accessories, and, above all, by the “digital revolution“.

Filters Grovers Optics Northallerton

Filters

15 products - next page link at the bottom

Showing 1-15 of 88 item(s)

Active filters

  • Baader IR-Pass filter blocks wavelengths below 670 nm. At these longer wavelengths, planetary images are less disturbed by atmospheric conditions. By combining a luminance image taken with the IR-Pass filter, along with RGB frames, overall image sharpness is significantly enhanced. There are some amazing images taken of the planets using this technique.

  • Baader H-BETA CCD 8.5NM

    Price £99.95

    CCD imagers will find Baader's Premium 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. 

    Please ensure you order the size you require - Available in 1.25 inch (31.7mm) or 2 inch (50.8mm)

  • With the help of this special CE certified film with a filter factor of 100,000 you can observe the sun directly with your binoculars or telescope

  • CCD imagers will find Baader's new Narrowband CCD pass filters to deliver the absolute highest contrast deep sky images in H-Alpha, H-Beta, Oxygen III, and Sulfur-II, with the shortest exposures possible

    Please ensure you order the size you require - Available in 1.25 inch (31.7mm) or 2 inch (50.8mm)

  • Baader CCD Narrowband...

    Price £293.00

    Baader's Premium Narrowband CCD filters are proven to deliver the absolute highest contrast deep sky images in H-Alpha, H-Beta, Oxygen III, and Sulfur-II, take advantage of the absolute shortest exposure times available.

    Please ensure you order the size you require - Available in 1.25 inch (31.7mm) or 2 inch (50.8mm)

  • Planoptically Polished with Phantom Coating Group (PCG).

    A unique filter for many different astronomical tasks.

    Please ensure you order the size you require - Available in 1.25 inch (31.7mm) or 2 inch (50.8mm)

  • A polariser or polarizer enhances contrast during planetary observation. Useful for solar work in conjunction with Baader Herschel Wedge Prism. Planoptically polished.

    Please ensure you order the size you require - Available in 1.25 inch (31.7mm) or 2 inch (50.8mm)

  • Planoptically Polished with Phantom Coating Group (PCG).

    The BAADER Fringe-Killer Filter minimizes unwanted blue fringing, comparable to a Minus-Violet-Filter, while retaining a very pleasing color balance.

    Please ensure you order the size you require - Available in 1.25 inch (31.7mm) or 2 inch (50.8mm)

  • All substrates fine optically polished. These filters by far supersede the mediocre quality of common `flame polished` colour filters. Fine optical polish and 2 mm thickness allows these filters to be inserted anywhere into the optical path without introducing astigmatism or other defects.

  • Baader Semi APO Filter

    Price £70.95

    Planoptically Polished with Phantom Coating Group (PCG).

    Baader's newest addition for Achromat owners. The Semi-APO works like it's name implies - delivering an amazingly neutral view, while cutting most of the annoying and contrast-robbing violet fringe that plagues all achromats.

    Please ensure you order the size you require - Available in 1.25 inch (31.7mm) or 2 inch (50.8mm)

  • Baader CCD-Filterset

    Price £235.00

    A new line of Baader LRGB filters now supplements the Baader narrowband emission line filters (H-beta/O III/H-alpha/S II)

    Please ensure you order the size you require - Available in 1.25 inch (31.7mm) or 2 inch (50.8mm)

  • Premium deep sky nebula filter from Baader Planetarium. Optically polished.

    The Baader UHC-S manages to improve on the contrast of the typical broadband or so-called "Deep Sky" filters.

    Please ensure you order the size you require - Available in 1.25 inch (31.7mm) or 2 inch (50.8mm)

  • Baader UV & IR Cut /...

    Price £51.95

    Planeoptically polished and hard coated! Blocks UV below 400nm and IR above (SII) 680nm. Maximum transmission, scratchproof hard coated.

    Please ensure you order the size you require - Available in 1.25 inch (31.7mm) or 2 inch (50.8mm)