This is the new version Lens Ring for Samyang 12mm F2.8 Fisheye (Nikon F / Pentax K Mount). New design allows full access to focus and aperture rings on the lens.
Incidentally, it has the same components as the Lens Ring for Samyang 8mm F3.5 Fisheye I (Nikon F / Pentax K Mount) V2 (F6530). One ring fits both lenses.
Features and Highlights
Mounted close to the camera to reduce stress on the lens due to gravity of camera body.
Rolling the camera/lens in any position including the popular 0, 60 and 90 degree positions.
Index marks for every 30 degrees for easy alignment of roll of lens.
Permanently mounted to lens, making reproducible mounting possible, and much quicker to set up.
Compact and lightweight.
Arca Swiss Compatible quick release design, can be mounted directly to other Arca Swiss compatible systems.
Great for use on a monopod or high pole.
Easy to install.
Optional advanced rail stop to remember NPP setting.
Lens ring components: LR10+LRP45+Plastic Insert.
Here is a recent panorama shot using this lens.
"This is a pano made with A7R and 12mm samy (NN Ultimate R1), 8 shots around, slanted mode, tilted up 5°. zenith closed, nadir retouching was easy, so no extra shot down. Alternatively: 6 x +15° + 1N or vice versa 6 x -15° + 1Z ."