SV165 Mini Guide Scope Support sensitive auto guiding cameras for easy guide star acquisition; Supports most astronomy camera mounts for astrophotography Supports 1.25" eyepiece mounts for a range of visual observations(Used with eyepiece, imaging is inverted imaging) Contains standard threads on the outside for mounting DSLR cameras or other accessories via adapters（Accessories not included） SVBONY SV220 7nm SII&OIII dual narrowband filter is engineered for astrophotography, allows One-Shot Color cameras to capture rich, detailed narrowband images in a single exposure, without the need for combining multiple filters. High transmission and sharp cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects. Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.