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.

  • Planoptically Polished with Phantom Coating Group (PCG).

    Drastically improves contrast for all reflector telescopes, without loss of brightness!

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

  • Meade Series 4000 Eyepiece and Filter Set #607001. Complete set of the most popular accessories for your Meade telescope. This comprehensive kit makes accessorizing a snap.

    • For use with 1.25″ eyepieces
    • Threads into eyepiece barrel
    • Reduces brightness and cuts glare, increasing clarity of the Moon, Venus, and bright double stars
    • 13% light transmission
    • Provides a true colour image
  • Tested in Germany under the stringent safety requirements of DIN EN ISO 12312-2 : 2015-11 and certified 100% safe for solar observation. Watch Solar Eclipses, Sun Spots, Planet Transits, crossing aircrafts and satellites.

  • Baader Astro Solar...

    Price £30.95

    ONE FILTER IS DESIGNED TO COVER ONE LENS ON A PAIR OF BINOCULARS.

    Your filter can be attached inside or outside the optic with bolts supplied. So there is a min-max range that a single filter will fit.

    Select your size on right & refer to the options files below

    See below attachment for the instructions for the range of baader solar filters for telescope binoculars & spotting scopes

  • Your filter can be attached inside or outside the optic with bolts supplied. So there is a min-max range that a single filter will fit.

    Select your size on the right & refer to the options files below.

    Call for price for the 150mm filter

    See below attachment for the instructions for the range of baader solar filters for telescope binoculars & spotting scopes

  • Baader Astro Solar...

    Price £53.95

    Filters can be attached inside or outside the optic with bolts supplied. So there is a min-max range that a single filter will fit.

    Select your size on right & refer to the options files below.

    See below attachment for a review & the instructions for the range of Baader solar filters for telescope binoculars & spotting scopes

  • These contrast-enhancing anodized aluminium, optical glass filters are designed to block out the wavelengths of light emitted by mercury-vapour light and other common causes of light pollution, whilst providing higher transmission at critical hydrogen-alpha and hydrogen-beta lines than competing filters.

  • These high quality anodized aluminium, optical glass variable polarising filters reduce the amount of light entering your eyepiece.

  • 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 Astro Solar...

    Price £239.00

    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