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Sigma 30mm f/1.4 DC A (Art) Lens, Dedicated Only for Sigma SA Mount (please note: not Sony Alpha Mount){62}
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$263.00
Sigma 30mm f/1.4 Art: APS-C's proven fast-prime standard.
On an APS-C body, 30mm lands at roughly a 45mm full-frame equivalent, making this a natural walk-around focal length with the light-gathering muscle of f/1.4. The Sigma Art series earned its reputation on optical discipline, and this lens delivers that through a 9-element, 8-group design with one aspherical element keeping aberrations in check wide open. Nine rounded diaphragm blades mean out-of-focus areas render with smooth, circular transitions than polygonal artifacts.
The HSM (Hypersonic Motor) drive keeps autofocus quiet and quick, with full-time manual override available without switching modes. At 435g and 63mm long, it's dense but compact enough to pair with a mid-size APS-C body without front-heavy imbalance. Minimum focus sits at 0.3m, so you're not locked out of closer subjects, though the 0.15x maximum magnification keeps this squarely in general-purpose territory than close-up work.
For Sigma SA mount shooters building out a fast-prime kit, this is the established standard-length anchor. The optical formula and f/1.4 ceiling at this focal length represent serious bang for what the Art line typically commands on the used market.
Who It's For
Documentary and street photographers working APS-C Sigma bodies get a near-normal field of view with f/1.4 low-light capability, letting them shoot in dim interiors without flash. Portrait shooters benefit from the 9 rounded blades producing smooth out-of-focus rendering at wider apertures. Event photographers who need reliable, quiet HSM autofocus in unpredictable lighting conditions will find the motor responsive without drawing attention. Anyone building a dedicated Sigma SA mount system who wants a fast, optically disciplined prime at a workhorse focal length will find this lens earns its place in regular rotation.
Key Features
- 30mm f/1.4 prime with 45mm full-frame equivalent on APS-C
- 9-element, 8-group design with 1 aspherical element
- 9 rounded diaphragm blades for smooth bokeh rendering
- HSM ultrasonic autofocus with full-time manual override
- Minimum focus 0.3m with 0.15× maximum magnification
- 435g, 63mm length, compact for APS-C bodies
- 62mm filter thread, distance scale included
- Sigma SA mount-not compatible with Sony Alpha
FAQ
- What's the full-frame equivalent focal length on APS-C?
- 30mm on APS-C gives you roughly 45mm equivalent, landing squarely in standard prime territory for walk-around shooting.
- Does this lens have image stabilization?
- No. On APS-C at f/1.4, the shallow depth of field already limits handheld shutter speeds; stabilization wouldn't solve that trade-off.
- How fast is the autofocus, and can I override it manually?
- The HSM motor is quiet and responsive. Full-time manual override is available without switching modes or disengaging AF.
- What's the closest focus distance and macro capability?
- Minimum focus is 0.3m (11.81 inches). Maximum magnification is 0.15×, so this is a general-purpose lens-not a macro tool.
- Is this lens weather-sealed?
- No weather sealing. It's a standard Art lens without environmental protection.
- What filter thread does it use?
- 62mm. A standard size with plenty of affordable filter options available.
- Does it come with a hood?
- Yes, the LH686-01 hood is included.
| Specification | Value |
|---|---|
| Focal Length | 30mm |
| Max Aperture | f/1.4 |
| Mount | Sigma SA Bayonet |
| Stabilization | No |
| AF System | Yes |
| Lens Type | Prime lens |
| Minimum Aperture | f/16 |
| Aperture Ring | No |
| Diaphragm Blades | 9 |
| Aperture Notes | Rounded blades |
| Elements | 9 |
| Groups | 8 |
| Special Elements Coatings | 1 aspherical element |
| Minimum Focus M | 0.3 |
| Minimum Focus | 11.81" in |
| Maximum Magnification | 0.15× |
| Motor Type | Ultrasonic (HSM) |
| Full Time Manual | Yes |
| Distance Scale | Yes |
| DOF Scale | No |
| Weight | 435 g |
| Diameter | 74 mm |
| Length | 63 mm |
| Weather Sealing | No |
| Filter Thread | 62 mm |
| Hood Product Code | LH686-01 |
This description was generated using AI based on KEH's internal product standards, product expertise, and knowing what customers care about most. While we strive for accuracy, details may vary by individual item.
| Brand Name | Sigma |
|---|---|
| Filter Size | 62mm |
| Focus Type | Autofocus (lens motor) |
| Lens Mount | Sigma SA |
| Lens Type | Standard / Normal |
| Max Focal Length | 30mm |
| Min Focal Length | 30mm |
