Photographer and content creator Manny recently tried out the Laowa 15mm f/4.5 Shift Lens which, while clearly very niche, he argues can be used very effectively for architecture photography in this 12-minute video.
Venus Optics has just unveiled a new "world's first" in the optics game. The new Laowa 15mm f/4.5 Zero-D Shift Lens is apparently "the world's widest shift lens for full-frame cameras," and it will be available for both DSLR and mirrorless cameras.
Photographer Mathieu Stern did this short experiment with capturing the full image circle from a 180-degree fisheye lens. You'll need a smaller image circle on a larger camera sensor. For this video, Stern used a Kenko 180° fisheye lens, screwed onto a 55mm to 52mm filter, screwed onto a Canon 50mm f/1.4 FD lens, screwed onto a NEX adapter, mounted to the Sony a7II.