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 85 item(s)

Active filters

  • An excellent & well made filter for observing our Moon. Like many astronomy filters, it is threaded and attaches to the underside of all popular 1.25 inch eyepieces (push-fit astronomy). This is the best seller for people when first buying an astronomy telescope.

  • Four great Moon filters in one kit, everything you’ll ever need for optimal views of the lunar surface including a plastic carrying case with Moon map and legend for identifying the most popular lunar features

    • Transmission peak approx. 80% at 350nm, bandwidth 60nm (320-380nm), completely blocking the entire spectral range from 200nm to 1120nm.
    • Dielectric multi-coating on optically polished Schott Glass
    • Enables imaging in the deep UV spectral region. A "breakthrough" for imaging the planet Venus! Allows amateur astronomers to capture cloud structures of the Venusian atmosphere
  • 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)

  • 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.

  • For perfect energy management during Lunar and Solar observion. NO reflections. NO straylight. NO ghosting.

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

  • 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)

  • 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)

  • 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)

  • 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)

  • 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 H-ALPHA 7NM CCD...

    Price £118.00

    CCD imagers will find that Baader's new Narrowband 7nm H-Alpha pass filter delivers the absolute highest contrast deep sky images of H-II regions, all 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)

  • Optically Polished. HBW 8.5nm. With Baader Low Profile Filter Cell & IR-Cut.

    This imaging filter enables high contrast deep sky images of H-II regions.

    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)