.style1 { border-color: #fefefe; border-width: 0; background-color: #ffffff; } TS Optics - T2 Extension ringLength: 15 mm Accurate manufactured T2 extension ring with an overall length of only 15mm excluding T2 external thread
High quality anodized aluminium, optical glass variable polarising filters for light reduction
In astronomy, polarising filters are used in various situations. A common application is the observation of reflection nebulae, where the light from stars is scattered by dust and gas clouds. A polarising filter can help increase the contrast between the nebula and the surrounding sky by reducing the scattered polarised light.