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Home Filters Light Pollution Filters OVL 1.25 Inch Light Pollution Filter
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. Great Nebula FilterThese filters allow maximum transmission of the important wavelengths of H-alpha, H-beta and doubly ionized oxygen - the ones most commonly emitted by nebulae. Explore the Orion, Dumbell and Ring Nebula with added contrast and detail.Ideal for any size TelescopeViews 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 as well as larger 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.
Ovl light pollution filter Excellent service from harrison telescopes, quick delivery and well packaged, good quality product (29/11/2021) Stuart - Rugeley
Light pollution filter Very quick delivery Works well , many thanks (16/05/2021) John burford - Mayfield
very good cuts out steet lights well (05/05/2021) peter - abingdon
Does what it says Product feels very high quality, blocks annoying glow of light pollution. Great product fully recommended will buy from this site again. (12/04/2021) Kyle -
Great value for the missing link in my Astro setup.Fast delivery also. Buy with confidence. (31/01/2021) TJ CHAMBERS - Kent
OVL 1.25 INCH LIGHT POLLUTION FILTER Great filter, again does exactly what it says on the tin. That good waiting for more filters to arrive. Amazing company quick transaction. 5* (22/11/2020) Ian Haley - West Yorkshire
Nice filter Filter works well to reduce light pollution when viewing from my garden which is on the edge of a city. Great service from Harrison telescopes. (03/10/2020) Dave - Leicester
Great product! Fast, quality and competitive price. Can’t complain!!!! (13/06/2020) Joe - Liverpool
Does the job Very well made for price, does the job, good delivery service. (17/05/2020) -
Very Useful Since I am observing the night sky from the City this is a useful tool to have (25/04/2020) Francesca -
OVL LIGHT POLLUTION FILTER Great service from these guys ! Item is very well made , in a case and should do a great job . Highly recommended for a better contrast in light polluted areas . An essential Bit of kit ! (04/04/2020) Phil D - West Midlands
Blue filter Jeff k . Im fairly new to astronomy . And bought this filter to aid better observations.just waiting fo a clear sky to tri it out . Looks good quality and arrived promptly !! (30/11/2019) Jeff knowles - Kent
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
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