Sky-Watcher 0.85x Focal Reducer/Flattener For 80/100/120/150ED DS-PRO
Designed for serious astro-photographers. Each model is optimised for the corresponding model in the Sky-Watcher Evostar-ED DS-Pro range. They effectively reduce the telescopes focal length by a factor of 0.85x and provide much improved field edge correction. You will need to use a Sky-Watcher DSLR-M48 Ring Adaptor to connect this to your telescope. As always, try to make sure you’re the telescope and tripod you’re using can support the weight of your camera.