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 89 item(s)

Active filters

  • Celestron Astromaster Accessory Kit
    • On sale!
    • -£10.00

    Celestron Astromaster...

    Regular price £69.95 Price £59.95

    Get more enjoyment from your telescope with the Celestron AstroMaster Accessory Kit.  Inside the plastic, foam-lined carry case you’ll find these accessories:

  • 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)

  • 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

  • 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.

    • 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 Planetarium Solar Continuum Filter - 1.25"

    • This Baader Planetarium Solar Continuum Filter comes in a fully-threaded 1.25" round cell.

    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.

  • 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)

  • 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)

  • 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)

  • 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)

  • 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)

  • 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)