For those who want to enjoy outdoor activities in the garden,you deserve to have SV503 80ED telescope. SV503 80ED telescope's objective lens features an S FPL-51 extra-low dispersion glass ED element, which virtually eliminates chromatic aberration. This results in the great color correction for an ED doublet lens. A thoroughly though-out design and high-quality mechanical components. This very special SV503 telescope provides astrophotographers, visual observers or nature watchers with a unique source of pleasure when observing starry skies or nature watching. SV188P 1.25in dielectric diagonal compatible with any 1.25in refractor telescope. SV188P can not connect with the SCT telescope directly, the additional adapter is required if you want to connect SV188P with the SCT telescope. The SVBONY ultra high contrast filter/UHC telescope filter is designed to improve the image contrast of nebulae and other deep-sky objects. UHC filters or light pollution reduction filters are designed to selectively reduce the transmission of certain wavelengths of light;especially those produced by artificial light. Due to its ability to produce exceptionally sharp and clear images;this filter is considered one of the most popular astronomy accessories.