The Helix Nebulabr/1. the largest bright planetary nebula in the skybr/2. Canon 60Da, Meade 25cm Schmidt-Newtonian, 60mm f/5 guide scope with ZWO ASI174MM Mini guide camera, Losmandy Titan mount; Backyard EOS for camera control.br/3. 16 x 300s at ISO1600br/4. stacked, colour balanced, noise reduction, and histogram equalized in Siril, enhanced in Photoshop.