Berkeley 90 and companions

Imaging Lens: Canon EF 200mm f/2.8 L Mount: Skywatcher HEQ5 Synscan Pro (belt mod) Camera: QHY 533M Guiding camera: ZWO ASI120MM Mini (mono) Guidescope: SkyWatcher EvoGuide 50ED Filters: Ha Constellation: Cygnus Date: August 6, 2025 Location: Albireo Observatory 3, Achaia, Greece Exposure Time: Ha: 4-pannel mosaic 6x300 sec per pannel (gain: 56.00, offset: 12.00) 0°C bin 1×1 Calibration Frames: Darks, Flats, Bias, Dark Flats Acquisition: N.I.N.A Processing: Pixinsight, Photoshop