The photo was taken an hour after sunrise, which gave the sun time to clear the horizon and disappear behind a bank of clouds.
As far as my gear, I rarely use anything wider than a 24mm equivalent lens (the wide end of my zoom lens). But in this case I used a 12mm (18mm equivalent) manually-operated Rokinon lens on my Sony a6000 camera.
"Penobscot Bay Morning"
Sony a6000 with Rokinon 12mm F2 lens (18mm equiv.)
Aperture priority @ F5.6. ISO100. 1/800 sec
Processing in Lightroom Classic CC