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Filters For Astronomy

A range of screw on filters are available to attach to your telescope eyepiece. Filters are available for viewing the moon, planets and the sun. They reduce glare and light scattering, increase contrast through selective filtration, increase definition and resolution, reduce irradiation and lessen eye fatigue. Filters are available in sizes to match your eyepiece type, eg 1.25 inch and 2 inch.
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Skywatcher Moon Filter (1.25") This Skywatcher moon filter attaches to any 1.25 inch eyepiece via the filter thread and reduces the amount of light coming through the eyepiece. Ideal for when viewing the moon as reducing its ..... More Information

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£9.00
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Celestron Moon Filter (1.25 Inch) This Celestron moon filter attaches to any 1.25 inch eyepiece via the filter thread. It reduces the amount of light coming through the eyepiece. Ideal for when viewing the moon as reducing its b..... More Information

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£9.00
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OVL Light Pollution Filter 1.25 Inch Light pollution filters are designed to block out the wavelengths of light emitted by mercury vapour light and other common causes of light pollution. Provide higher transmission at critical hyd..... More Information

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£19.00
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OVL Variable Polarising Filter 1.25 Inch This variable polarising filter consists of two polarising filters, one which can be rotated in its cell to adjust the brightness. They reduce the amount of light entering your eyepiece. You can..... More Information

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£23.00
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OVL Light Pollution Filter 2 Inch Light pollution filters are designed to block out the wavelengths of light emitted by mercury vapour light and other common causes of light pollution. Provide higher transmission at critical hyd..... More Information

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£26.00
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OVL Hydrogen Beta Filter 1.25 Inch This high performance CCD filter only transmits the Hydrogen Beta emission line making is useful for increasing the contrast of objects that glow in the corresponding region of the spectrum, for..... More Information

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£26.00
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OVL Lunar / Planetary Filter Set (1.25") This Lunar / Planetary filter set includes 4x high quality glass colour filters; yellow, red, green and moon filters. These filters will attach to the thread on most 1.25 inch format eyepieces. ..... More Information

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£29.00
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Baader Green Colour Filter 500nm Bandpass 1.25 Inch A colour filter for increasing the contrast when Lunar and planetary observing. A colour filter attenuates light and reduces glare, increasing contrast and resolution through selective filtering..... More Information

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£29.99
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OVL Variable Polarising Filter 2 Inch This variable polarising filter consists of two polarising filters, one which can be rotated in its cell to adjust the brightness. They reduce the amount of light entering your eyepiece. You can..... More Information

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£32.00
(Inc VAT)

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OVL Hydrogen Beta Filter 2 Inch This high performance CCD filter only transmits the Hydrogen Beta emission line making is useful for increasing the contrast of objects that glow in the corresponding region of the spectrum, for..... More Information

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£33.00
(Inc VAT)

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OVL UV | IR Cutoff Filter 1.25 Inch This UV/IR cut filter blocks UV and IR rays to maintain the color temperature you want, eliminating false colour fringes around bright stars. Offers a 99.9% light transmission rate for bright an..... More Information

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£35.00
(Inc VAT)

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OVL Narrowband UHC Filter 1.25 Inch Narrowband UHC filters isolate the two doubly ionized oxygen lines (496 and 501nm) in addition to the hydrogen-beta line (486nm) emitted by planetary and most emission nebulae. This filter permi..... More Information

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£38.00
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OVL O-III Narrowband Filter 1.25 Inch The O-III narrowband filter is specially designed for the observation of gas and planetary nebulae. It distinguishes different contrasts of the wavelengths of light that pass through, giving ide..... More Information

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£39.00
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OVL 5 Position Filter Wheel This handy, time saving device is a must have product for astronomers, for both visual and photographic use. Up to five filters can be installed in the threaded, numbered compartments, and each ..... More Information

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£54.00
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OVL Narrowband UHC Filter 2 Inch Narrowband UHC filters isolate the two doubly ionized oxygen lines (496 and 501nm) in addition to the hydrogen-beta line (486nm) emitted by planetary and most emission nebulae. This filter permi..... More Information

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£57.00
(Inc VAT)

Available to order

OVL O-III Narrowband Filter 2 Inch The O-III narrowband filter is specially designed for the observation of gas and planetary nebulae. It distinguishes different contrasts of the wavelengths of light that pass through, giving ide..... More Information

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£59.00
(Inc VAT)

Available to order

OVL L-RGB CCD Filter Set 1.25 Inch Designed for CCD astrophotography, the set includes Luminance-IR, Red, Green, and Blue dichroic CCD filters. The filters are resistant to humidity and scratching and set into a durable aluminium..... More Information

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£110.00
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