Feature(may vary by option.)
●The 1.25" O-III filter useful for large aperture telescopes through which the light of the Moon can be extremely overwhelming. Allowing just for the Double Ionized Oxygen lines between 495.9nm to 500.7nm to pass through at 90%
●Astrophotographic;The filter enhances contrast during visual observation of gaseous and planetary nebulae in all sky conditions; 1.25" filter allows high-contrast imaging even in areas with strong light pollution
●The filter made from high-grade glass with dichroic interference and antireflection coatings;not only useful at light-polluted sites; the contrast is also increased at dark sky sites;it can be used with all 1.25" eyepieces
●The O-III filter completely blocks virtually all other visible wavelengths of light so views of nebulas are optimized;increases contrast through selective filtration-Anti-reflection coated to prevent glaring and ghosting
●Narrowband filter do not eliminate the effects of light pollution or increase the object’s brightness;in many cases, they increase the contrast between nebula and night sky, not brightening the nebula
[1.25 inch]
[2 inch]
Description
SV115 O-III telescope filter suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants. Bright nebulae such as the M42 Orion Nebula can be viewed more clearly using SV115 narrowband filter in conditions of severe light pollution.
Using narrowband filter can increases the contrast between nebulae and the night sky, rather than increasing the brightness of an object or removing the effects of light pollution.
18nm Narrowband OIII Filter
Narrowband OIII filter is designed for nebula observation allowing 18nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).
The SV115 narrowband filter can be used with a variety of accessories such as astronomical cameras, focus reducers and eyepieces to achieve good seeing in both clear and dark observation conditions.
Strong and Sturdy
Made of quality materials, the threads are strong and durable, not easy to loosen, and can be used for a long time.
Ouality Optical Glass
SV115 O-III filter made from high-grade glass with dichroic interference and antireflection coatings.
SV115 filter comes with a plastic case with high pressure EVA case lining, protect the filter from damage.