About midnight at Crater Lake the comet was headed into a horizon polluted with smoke from fires in the area. After shooting many images at 200mm I was surprised that even at 100mm the tail filled the frame.

Canon 1DXII, Canon 100mm f2USM, Sky-Watcher Star Adventurer.

Adobe Photoshop. Stack of 6 images, each 240 seconds, ISO800, F4. The image is not cropped.