Today I managed to capture the end of a large M-Class flare from AR2673 which has been very active for most of this week:

Scope: Lunt LS60THa/B1200CPT, 2x Barlow (for detail images)
Camera: ZWO ASI174MM, FireCapture
Mount: Sky-Watcher AZ-GT
Processing: AutoStakkert! 2, PixInsight 1.8
Date: 9th September 2017, 12:04UTC
Amazing photos!