Samyang's APS-C fisheye — same as ID 553. 180-degree diagonal coverage at f/3.5 for multiple mounts.
The Samyang 8mm f/3.5 UMC Fisheye CS II is a manual-focus diagonal fisheye for APS-C cameras, providing approximately 180 degrees of diagonal coverage. This appears to be the same lens as ID 553 — check for duplicate entries in the database.
Optically good for a fisheye — sharp in the centre with UMC coating for flare control. The fisheye distortion is intentional and characteristic. Manual focus only with enormous depth of field making focus relatively uncritical. f/3.5-f/22 manual aperture.
Available in many APS-C mounts. Bulbous front element with built-in petal hood. No filter thread. Manual everything — no electronic contacts on most versions. Approximately 435g. Also sold as Rokinon and Bower.
Very cheap used. A fun creative lens for fisheye effects, skateboard photography, and virtual tour stitching. The large depth of field means manual focus is easy. Check for scratches on the protruding front element. Possible duplicate of ID 553.