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OVL Light Pollution Filter 1.25 Inch

OVL Light Pollution Filter 1.25 Inch

These filters allow maximum transmission of the important wavelengths of H-alpha, H-beta and doubly ionized oxygen - the ones most commonly emitted by nebulae.

Views of galaxies and star clusters are also enhanced, but to a lesser degree. Also improves contrast on reddish planetary detail. Works well in telescopes of all apertures but is highly recommended for use on smaller telescopes where narrower band filters are less suitable and swallow up too much light. Supplied with storage case and simply screws into any 1.25" eyepiece or accessory with a standard filter thread.

Customer Reviews

  Great service again.   I haven't had a chance to use it yet. The filter looks good quality. The service from Harrisons is spot on,hence the 5 stars.  (28/10/2018) H - Cambridge


  Good Quality  Useful and of good quality.   (17/08/2018) Erica - Worcestershire


  Well made product  Extremely high quality for the price.   (09/02/2018) Kevin Haworth - Liverpool


  looks good quality lens  not had chance to use this but it looks good quality lens and have been told by a friend that it works well.   (10/11/2017) paul - stoke-on-trent


Our standard delivery charge for most of the UK is £2.95. All orders are shipped promptly, lower value items are sent Royal Mail 1st class and higher value or larger goods are shipped via reputable courier. All goods are shipped fully insured with FEDEX, UPS, DPD and Royal Mail, we do not use budget courier services, please note we can only ship to UK mainland addresses. We are not able to ship to forwarding agents or PO boxes.

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Deliveries to UK mainland addresses are all shipped with fully insured premium services for £2.95, *some exceptions apply including many AB, FK, HS, IV, KA, KW, PA, PH, ZE postcodes. We will quote delivery charges to these areas where applicable prior to shipping (this does not normally affect lower value items shipped by Royal Mail).

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OVL Light Pollution Filter 1.25 Inch

MPN: 20198





Price: 19.00

Including VAT and Warranty ✔


This 1.25" contrast-enhancing anodized aluminium, optical glass filter is 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. Bright, light-polluted skies appear much darker, and the contrast between object and sky is improved significantly. This contrast-enhancement effect is particularly apparent on nebulae. Unlike stars, emission nebulae give off light in a very narrow range of wavelengths.




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