Just recently I received my new Herchel Wedge from Lunt and I was trying it for the first time. I had a 2x Barlow and my camera was inserted into the wedge. I was trying to focus my scope and I thought I saw the same exact granulations for a moment. It lasted just that moment like a flash and I could not repeat see it after that however many times I must have tried.
Well, the link I quoted is by the extraordinary expert - Christian Viladrich, the best expert in solar imaging. I do not expect to equal his work result ever but technically I am curious t understand the technique involved. From the description on the image, he seems to be using fairly ordinary equipment (except that he is using a 300 mm Newtonian dedicated to Solar work and also a frame rate at 60 frames at 75 microseconds which is a really very high frame rate).
I have ordered his famous book. Waiting to lay my hands on it.