Caught my first ISS solar transit with my 90mm Mak and Sony a6100. A few years ago, I caught some with a zoom bridge camera, so I've noticed the difference in quality.
These are the raw images as they came out of the camera. They are a bit processed though.
And this is the 204 images stack that I made after the transit in composition with the ISS shadows. I don't know if there is a better way, but I used "Multiply" on the layers in Photoshop and then adjusted the gain. Before that, I was gonna cut the ISS shadows and copy them into the stack. But it looked ugly.
