TTArtisan's ultra-wide manual fisheye/rectilinear for APS-C — 15mm equiv at f/2 for creative work.
The TTArtisan 10mm f/2 is a manual-focus ultra-wide prime for APS-C mirrorless, providing approximately 15mm equivalent at f/2. Depending on the version, it provides near-rectilinear ultra-wide coverage — useful for astrophotography and creative perspectives.
Optically adequate — sharp in the centre from f/4 with expected edge softness for an ultra-wide at this price. The f/2 aperture makes it useful for astrophotography on APS-C. Manual focus with smooth ring. Budget Chinese optics with metal construction.
Available for multiple mirrorless mounts. No electronic contacts on most versions. Approximately 230g — compact. All-metal construction. Filter thread varies by version. Minimum focus distance approximately 15cm.
Available used very cheaply. A budget entry to ultra-wide photography. The Samyang 12mm f/2 NCS CS is a more proven astrophotography alternative. For budget experimenters wanting ultra-wide at minimum cost.