
Rokinon
Rokinon 10M-C 10mm F2.8 Ultra Wide Angle Lens Canon EF-S
★★★★★
Shoot tack-sharp interiors, sweeping landscapes, and dramatic environmental portraits at f/2.8 with a 110-degree field of view built for APS-C Canon bodies.
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Overview
Key Features
Nano Crystal Coating System (NCS) for increased light transmission and reduced internal reflections
Fast F2.8 maximum aperture + close-focusing to 9.5 inches = maximum versatility in all shooting conditions
Optimized for excellent optical quality and true ultra-wide 110 degree edge to edge coverage with APS-C sensor digital cameras
Utilizes 3 high precision (2 Aspherical + 1 ED) lens elements for superior image quality
Specifications
Brand
Rokinon
Model
10M-C
Mount
Canon EF-S
Focal Length
10mm
Maximum Aperture
f/2.8
Effective Focal Length (APS-C)
~16mm
Field of View
110° (edge to edge, APS-C)
Minimum Focusing Distance
9.45 inches (0.24m)
Special Elements
2 Aspherical + 1 ED
Coating
Nano Crystal Coating System (NCS)
Autofocus
No (manual focus)
Aperture Control
Manual aperture ring
Sensor Compatibility
APS-C only
Pros & Cons
👍 Pros
- 110-degree field of view on APS-C delivers a genuinely ultra-wide perspective that 17–18mm wide kit lenses cannot replicate — architecture, interiors, and landscapes read as expansive rather than just wide.
- 9.45-inch minimum focusing distance allows foreground-to-infinity compositions that most ultra-wide lenses at this focal length cannot achieve.
- Nano Crystal Coating reduces ghosting and flare in high-contrast scenes with bright light sources — a direct performance improvement over uncoated alternatives.
- Two aspherical and one ED element in the optical formula control the distortion and chromatic aberration that plague lesser ultra-wide constructions.
- f/2.8 maximum aperture provides a usable two-to-three stop advantage in low-light interiors and astrophotography versus slower alternatives.
👎 Cons
- Manual focus only — no autofocus motor means this lens cannot be used for fast-moving subjects or event photography where rapid, precise focus acquisition is required.
- Canon EF-S mount restricts this lens to APS-C bodies only; it is incompatible with full-frame Canon EF bodies, limiting future system upgrade paths.
- Manual aperture ring operation requires the photographer to meter and expose with the aperture set on the lens, not via the camera body — a workflow adjustment for shooters accustomed to fully electronic lenses.
- No optical image stabilization — at 10mm this is rarely a problem for static subjects, but handheld video or shooting at low shutter speeds amplifies camera movement.
- Wide angle distortion, while controlled by the aspherical elements, is still present at 10mm — straight lines near the frame edges require correction in post for architectural work requiring geometric precision.
Frequently Asked Questions
Will this lens autofocus on my Canon APS-C body, or is it manual focus only?
The Rokinon 10mm F2.8 in Canon EF-S mount is a manual focus lens. There is no autofocus motor. For architectural and landscape work where you're shooting at f/8–f/11 with hyperfocal distance, this is rarely a limitation. For fast-moving subjects or event shooting where precise AF is critical, the manual-only design is a genuine constraint to weigh.
What effective focal length does 10mm produce on a Canon APS-C camera?
On a Canon APS-C sensor with a 1.6x crop factor, 10mm gives an effective focal length of approximately 16mm — a true ultra-wide perspective with a 110-degree edge-to-edge field of view. This is noticeably wider than a 17mm or 18mm kit lens, providing a dramatic rectilinear wide angle without fisheye distortion.
How close can this lens focus, and does that affect composition options?
Minimum focusing distance is 9.45 inches (0.24m) from the sensor plane. At 10mm with this close-focus capability, you can fill the frame with a nearby subject while still capturing a wide environmental context behind it — a compositional technique useful for real estate interiors, environmental portraits, and detailed landscape foreground elements.
Does the Nano Crystal Coating meaningfully reduce flare when shooting toward light sources like windows or sun?
Yes, measurably so. NCS multi-coating reduces internal reflections and ghosting when shooting into or across a light source — a frequent scenario in architecture (windows) and landscape (sun position). It does not eliminate flare entirely at extreme angles, but the coating performs noticeably better than uncoated or single-coated ultra-wides in high-contrast lighting.
Is the f/2.8 aperture useful at 10mm, or does depth of field make it irrelevant?
At 10mm, even f/2.8 produces extensive depth of field — most of the scene from a few feet to infinity is acceptably sharp. The f/2.8 value is primarily useful for low-light shooting where you need the extra two stops versus f/5.6, not for shallow depth-of-field isolation. In dark interiors, astrophotography setups, or poorly lit event spaces, f/2.8 at 10mm is a meaningful capability.