Sigma 879956
The 1.4x teleconverter extends autofocus capability up to f/8 with compatible cameras, making it a practical tool for telephoto shooters. Its dust and splash-proof construction adds durability for outdoor use, while the compact 9.9 cm package keeps it easy to carry. Best for photographers using Sigma SA-mount lenses who need extra reach without losing autofocus in challenging conditions.
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Обзор
The 30-Second Version
A niche teleconverter that's surprisingly good at macro but stuck on a dead mount. If you don't shoot Sigma SA, this thing is a paperweight.
Pros & Cons
Плюсы
- Dust and splash proof, so you can shoot in weather that would scare off lesser gear 94th
- Autofocus works up to f/8, which keeps AF alive on slower lenses 91st
- That 99mm minimum focus distance is absurdly close for a teleconverter 71st
- Adds 1.4x reach without buying a whole new lens 70th
Минусы
- No stabilization, so handheld shots at long focal lengths get shaky fast
- Optical quality takes a hit, sitting at a weak 33rd percentile
- Only works with Sigma SA mount, which is basically a dead system
- Customer rating of 3.6 out of 5 is rough, even with only 7 reviews
Факты
Performance
The macro score surprised us. A 94th percentile ranking for macro work is wild for a teleconverter, and that 99mm minimum focus distance means you can get stupidly close to your subject. The 1.4x magnification boost turns a decent telephoto into a legit close-up tool. But the optical score sits at a mediocre 33rd percentile, so you're trading some sharpness for that reach. The single ED element helps, but it's not a miracle worker.
Specifications
Full Specifications
Optics
| Type | Telephoto |
| Focal Length Min | 1400 |
| Focal Length Max | 1400 |
| ED Elements | 1 |
Build
| Mount | Sigma SA |
| Weather Sealed | Yes |
| Weight | 0.2 kg / 0.4 lbs |
AF & Stabilization
| AF Type | Autofocus |
Focus
| Min Focus Distance | 99 |
| Max Magnification | 1.4x |
vs Competition
Stacked against the Tamron 28-300mm VC or the Sony 18-135mm OSS, the TC-1401 isn't even playing the same game. Those are versatile zooms with stabilization and modern mounts. The Sigma is a single-purpose accessory for a dying mount. The Meike 85mm f/1.4 II gives you actual portrait chops with real bokeh for similar money. The only reason to pick the TC-1401 is if you already own Sigma SA telephoto glass and refuse to switch systems.
| Spec | Sigma 879956 | Tamron Di III VC 28-300mm f/4-7.1 VXD | Nikon NIKKOR 20059 | Panasonic Leica DG Vario-Elmarit H-ES12035 | Sony E 18-135mm f/3.5-5.6 OSS | Canon RF 28-70mm f/2.8 IS STM |
|---|---|---|---|---|---|---|
| Focal Length | 1400mm | 28-300mm | 18-55mm | 12-35mm | 18-135mm | 28-70mm |
| Max Aperture | - | f/4 | f/3.5 | f/2.8 | f/3.5 | f/2.8 |
| Mount | Sigma SA | Sony E | Nikon F | Micro Four Thirds | Sony E | Canon RF |
| Stabilization | false | true | true | true | true | true |
| Weather Sealed | true | true | false | true | false | true |
| Weight (g) | 190 | 590 | 205 | 306 | 326 | 495 |
| AF Type | Autofocus | VXD linear motor | pulse stepping motor | Autofocus | Linear motor | STM |
| Lens Type | telephoto | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Товар | AF | Bokeh | Build | Macro | Optical | Aperture | Versatility | Отзывы пользователей | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Sigma 879956 | 53.8 | 69.6 | 90.7 | 93.5 | 32.6 | 70.7 | 33.2 | 10.1 | 34.4 |
| Tamron Di III VC 28-300mm f/4-7.1 VXD Compare | 97.7 | 83.3 | 62.9 | 83.2 | 96.3 | 70.7 | 97.9 | 50.5 | 79.3 |
| Nikon NIKKOR 20059 Compare | 84.6 | 81.1 | 83.6 | 95.4 | 54.4 | 82.5 | 82.8 | 86.2 | 92.3 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 53.8 | 86.5 | 83.8 | 48.8 | 86.1 | 88.1 | 80.4 | 86.2 | 96.4 |
| Sony E 18-135mm f/3.5-5.6 OSS Compare | 97.7 | 81.1 | 70.9 | 37.3 | 77.9 | 82.5 | 95.8 | 90.7 | 79.3 |
| Canon RF 28-70mm f/2.8 IS STM Compare | 84.6 | 86.5 | 70.4 | 41.4 | 83.8 | 88.1 | 76.9 | 53.5 | 98.4 |
Цена
Value & Pricing
At $315 USD, this is a tough sell. You're paying real money for a teleconverter that only works on Sigma SA mount cameras, a system Sigma itself has largely abandoned. If you're already deep in SA glass and need the reach, fine. But for most people, that $315 is better spent on a used lens or a different mount entirely.
Подробнее
Overview
The Sigma TC-1401 is a 1.4x teleconverter, not a 1400mm lens. That focal length in the spec sheet is what you'd get if you slapped this onto a 1000mm monster, but on its own it's just a smart little tube of glass that makes your existing Sigma telephoto reach further. The one thing to know? It's a niche tool that does one job well, but it's not for everyone.
Common Questions
Q: Will this work on my Canon or Nikon camera?
Nope. This is Sigma SA mount only. If you're not shooting a Sigma SA body, this teleconverter won't even attach. Look for a teleconverter made for your specific mount instead.
Q: Does this teleconverter work with all Sigma lenses?
No. Teleconverters only work with specific lens designs, usually longer telephotos. Check Sigma's compatibility list before buying. Slapping this on a wide angle or a lens with a protruding rear element can damage both the lens and the converter.
Q: How much image quality do I lose with a 1.4x teleconverter?
You'll lose some sharpness and a stop of light. The TC-1401's optical score sits at a mediocre 33rd percentile, so expect softer images than your lens produces on its own. It's a trade-off: more reach, less crispness.
Who Should Skip This
If you're looking for a general-purpose lens or a teleconverter for a modern mirrorless system, this isn't it. Go get a native-mount teleconverter for your camera instead. And if you want actual macro performance without the optical penalty, buy a dedicated macro lens. The TC-1401 is only for Sigma SA diehards who need extra reach and already know the compromises.
Verdict
Skip it unless you're one of the few people still shooting Sigma SA mount and you specifically need more reach from a lens you already own. The macro performance is genuinely impressive, but the optical hit, lack of stabilization, and dead-end mount make this a hard pass for everyone else.
