Samyang's manual fast 135mm — the f/2 ED UMC for Canon EF portrait and astrophotography.
The Samyang 135mm f/2 ED UMC is a manual focus fast telephoto prime for Canon EF mount. At f/2 and 135mm, it provides extraordinary subject isolation and is highly regarded for astrophotography due to excellent coma control. Also sold as Rokinon. One of the most recommended manual focus portrait and astro lenses ever made.
Optical performance is very good — one of Samyang's finest designs. Sharpness is excellent from f/2. The 135mm at f/2 produces extraordinarily smooth, creamy bokeh. Coma is remarkably well-controlled — making this a top recommendation for Milky Way photography. ED elements control chromatic aberration. UMC coatings reduce flare effectively.
Canon EF mount with no electronic communication — fully manual. Filter thread is 77mm. Weight is approximately 830 grams. Build quality is solid metal. No AF or EXIF data. The focus ring is smooth with good throw for precise manual focusing. The 77mm filter thread enables standard filters for astro light-pollution work.
Very affordable on the used market. Check smooth focus and clean optics. One of the most celebrated manual focus lenses available. The combination of 135mm, f/2, excellent coma control, and budget price makes it legendary for astrophotography. Also outstanding for portraits. The lack of AF is the only practical drawback.