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ASI2600MC-Pro Sigma 150-600mm Lens @ 250mm CEM40 mount ASI120MM-Mini guide camera on ASI 30mm guide scope Autoguiding with PHD2 60 x 240 sec Lights Darks, Flats, and Dark Flats for calibration Stacked and processed in PixInsight

ASI2600MC-Pro Canon 135mm F/2L USM Lens CEM40 mount ASI120MM-Mini guide camera on ASI 30mm guide scope Autoguiding with PHD2 Image sequencing with NINA 94 x 120sec Lights + 130 x 60 sec Lights over 2 nights Darks, Flats, and Dark Flats for calibration Stacked and processed in PixInsight

Date: 6-Feb-2021 Telescope: SkyWatcher Esprit 100 Mount CEM 40 Imaging camera: ASI2600MC-Pro Guide camera: ASI290MM-mini Imaging software: NINA and PHD2 Post-processing software: PixInsight 60 x 180sec Lights 20 Darks 32 Flats 32 Dark Flats

Date: 5-Feb-2021 Telescope: SkyWatcher Esprit 100 Mount CEM 40 Imaging camera: ASI2600MC-Pro Guide camera: ASI290MM-mini Imaging software: NINA and PHD2 Post-processing software: PixInsight (usign HDR composition) 80 x 15 sec + 60 x 30 sec + 40 * 120 sec + 20 * 240 sec Lights 20 Darks 32 Flats...

Date: 6-Feb-2021 Telescope: SkyWatcher Esprit 100 Mount CEM 40 Imaging camera: ASI2600MC-Pro Guide camera: ASI290MM-mini Imaging software: NINA and PHD2 Post-processing software: PixInsight 95 x 180sec Lights 20 Darks 32 Flats 32 Dark Flats

The entire transit took 0.78 seconds; here's a real-time video of it. You can also see a couple pairs of sun spots straddling the path of the ISS.

Celestron C6 with 0.63x FR ZWO ASI2600MC-Pro imaging camera CEM40 mount 1/1000 sec exposures at 20 FPS Composited using Photoshop