OVL Hydrogen Beta Filters£28.00 - £39.99
This high performance CCD filter transmits only the Hydogen Beta emission line, and therefore is useful for greatly increasing the contrast of objects that glow in the corresponding region of the spectrum, for example the Horsehead, Cocoon and California nebulae.
Explore Scientific CLS Nebula Filter 1.25"£44.00
Standing for "City Light Suppression", the Explore Scientific 1.25" CLS Nebula Filter is not just for observing nebulous objects, as it lets a broader swathe of wavelengths through to the observer than either the OIII or UHC Explore Scientific filters do.
Explore Scientific UHC Nebula Filter 1.25"£44.00
More versatile than the OIII filter, the Explore Scientific 1.25" UHC Nebula Filter will work on a broader range of nebulous objects, due to its dual peaks in transmissions on both broader OIII lines and Hydrogen wavelengths
OVL Oxygen III Narrowband Filter£44.00 - £59.99
The O-III narrow band-pass filter isolates just the two doubly ionized oxygen lines (496 and 501nm) emitted by diffuse, planetary and extremely faint nebulae.
OVL UHC Ultra High Contrast Nebula Filter£44.00 - £59.99
The narrowband UHC filter, like the O-III filter, isolates the two doubly ionized oxygen lines (496 and 501nm) in addition to the hydrogen-beta line (486nm) emitted by planetary and most emission nebulae.
Baader UHC-S / L-Booster Filters£57.00 - £96.00
The Baader UHC-S manages to improve on the contrast of the typical broadband or so-called "Deep Sky" filters. Sky background is darker, and contrast of emission nebulae are noticeably improved
Explore Scientific O-III Nebula Filter 1.25"£57.00
Observing difficult, dim Deep Sky targets like Planetary Nebulae and certain supernovae remnants, such as the Veil Nebula in Cygnus from light poluted environments can be a very tricky business. This is where the Explore Scientific 1.25" O-III Nebula Filter shows its strengths.
Astronomik UHC-E Deep Sky Filters£58.00 - £112.00
The Astronomik UHC-E filter is our budget filter for deep-sky observation of emission nebulae and comets under light polluted skies. Itís particularly suitable for small íscopes.
Baader Contrast Booster Filters£64.00 - £99.00
A unique filter for many different astronomical tasks. Incomparable in accracy to combinations of generic color filters made of raw polished glass Ė where surface inaccuracy adds up in the optical wave front to an unbearable degree!
Baader Fringe Killer Filters£65.00 - £92.00
The BAADER Fringe-Killer Filter minimizes unwanted blue fringing, comparable to a Minus-Violet-Filter, while retaining a very pleasing color balance.
Explore Scientific CLS Nebula Filter 2"£66.00
Standing for "City Light Suppression", the Explore Scientific 2" CLS Nebula Filter is not just for observing nebulous objects, as it lets a broader swathe of wavelengths through to the observer than either the OIII or UHC Explore Scientific filters do.
Explore Scientific UHC Nebula Filter 2"£66.00
More versatile than the OIII filter, the Explore Scientific 2" UHC Nebula Filter will work on a broader range of nebulous objects, due to its dual peaks in transmissions on both broader OIII lines and Hydrogen wavelengths
Astronomik CLS Deep Sky & Light Pollution Filters£67.00 - £143.00
The Astronomik CLS is a budget filter for visual observation, Black & White photography and CCD photographs of nebulae, galaxies and star clusters with astronomical instruments of any size.
Baader Oxygen III 10nmHBW Visual Filters£68.00 - £114.00
Planoptically polished for the highest image quality. Only 10nm FWHM with a 93% transmission rate. Perfect for planetary observation producing very high contrast levels.
Antares UHC Narrowband Nebula Filter 1.25"
This high quality UHC filter is a narrowband nebula filter for enhancing globular and planetary deep sky objects. It blocks out a certain band of light to enhance contrast and detail on deep sky objects.
Explore Scientific H-Beta Nebula Filter 1.25"£76.00
The Explore Scientific H-beta filter uses a characteristic property of the so called emission nebulae. Those objects glow in special colors, the so called emission lines. Those emission lines are linked to chemical elements - in this case hydrogen.