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OVL Light Pollution Filter 2 Inch

OVL Light Pollution Filter 2 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 2" eyepiece or accessory with a standard filter thread.

Customer Reviews

  Very impressed   For what seems to be a budget filter compared to others on the market, it has produced very impressive results for both viewing and photography.  (19/12/2018) Ewan -


  Excellent filter with an excellent price to match!  I've used this filter for a couple of sessions now, mainly using my ethos 13mm and Explore Scientific 20mm 100d. I have to be honest whichever ep I'm using this filter stays in, there's a noticeably darker background stars are better defined and that glow is completely gone. Great service as well.   (21/07/2017) Richard Hather - Bury


  Helping to observe in light pollutiion  Without the filter the light pollution stopped observation of m42. With the filter i could see good details   (17/03/2017) Neil Clark - Durham


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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We hold stock, dozens of telescopes and literally thousands of accessories that we ship out each business day, normally orders received before lunch are shipped that business day. We also direct ship from our UK suppliers, this means we have access to thousands of products that can ship fast to our customers.

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 2 Inch

MPN: 20199





Price: 25.00


This 2" 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. Choose this version for 2" eyepieces and accessories.




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