Nikon Auto Focus-S FX TC-20E III Teleconverter
Doubling focal length while maintaining autofocus, this teleconverter uses an aspherical element and a 7-element/5-group optical design to preserve superior contrast and resolution. Its compact, 329g build makes it a highly portable way to extend telephoto reach without the cost of a new super-telephoto lens. This accessory is best for wildlife and sports photographers using compatible Nikon F-mount primes who need 2x magnification and can accept the resulting light loss.
एक नज़र में
The 30-Second Version
This 2x teleconverter is a mixed bag. It can produce sharp results with fast pro lenses, but the 2-stop light loss cripples autofocus and image quality on slower glass. Only buy it if you're pairing it with an f/2.8 or faster telephoto prime, otherwise the 1.4x version is a much better bet.
Pros & Cons
खूबियाँ
- Doubles your focal length in a tiny, lightweight package. 97th
- Excellent sharpness and contrast when paired with fast pro glass. 67th
- Solid build quality that feels right at home on a heavy lens.
- A much cheaper path to super-telephoto reach than a new lens.
कमियाँ
- You lose 2 stops of light, turning an f/2.8 lens into a dim f/5.6.
- Autofocus performance tanks on anything but the fastest lenses.
- Optical quality takes a noticeable hit compared to cropping on a high-res body.
- Compatibility is limited, so double-check Nikon's list before you buy.
मालिकों की राय
The Word on the Street
प्रमाण
Performance
When paired with a fast, top-tier prime like a 300mm f/2.8, this thing can deliver results that are genuinely impressive. Sharpness holds up well in the center, and contrast is good. But slap it on a slower zoom, and the story changes fast. Autofocus gets sluggish and hunts, especially in anything but bright light. Our data shows optical quality is a weak spot overall, landing in the 21st percentile. That's the trade-off: you're magnifying the lens's flaws right along with the subject. The aspherical element helps control aberrations, but it can't fix the fundamental physics of losing two stops.
Specifications
Full Specifications
Build
| Mount | Nikon F |
| Weight | 0.3 kg / 0.7 lbs |
Focus
| Min Focus Distance | 35 |
vs Competition
Comparing this to standard zoom lenses like the Tamron 17-70mm f/2.8 or Sigma 28-70mm f/2.8 is a bit of an apples-to-oranges situation. Those are versatile workhorses, while the TC-20E III is a single-purpose reach extender. Its real competition is other teleconverters, like Nikon's own TC-14E III. That 1.4x converter costs about the same, only robs you of one stop of light, and delivers noticeably better image quality. Unless you absolutely need the full 2x magnification, the 1.4x is the smarter play for most shooters.
| Spec | Nikon Auto Focus-S FX TC-20E III Teleconverter | Tamron Di III 17-70mm f/2.8 Di III-A VC RXD | Sigma Contemporary 28-70mm f/2.8 DG DN | Panasonic Leica DG Vario-Elmarit H-ES12035 | Sony E 18-135mm f/3.5-5.6 OSS | Viltrox Pro AF 27mm f/1.2 |
|---|---|---|---|---|---|---|
| Focal Length | - | 17-70mm | 28-70mm | 12-35mm | 18-135mm | 27mm |
| Max Aperture | - | f/2.8 | f/2.8 | f/2.8 | f/3.5 | f/1.2 |
| Mount | Nikon F | Sony E | Sony E | Micro Four Thirds | Sony E | Sony E |
| Stabilization | false | true | false | true | true | false |
| Weather Sealed | false | true | true | true | false | true |
| Weight (g) | 329 | 544 | 470 | 306 | 326 | 560 |
| AF Type | - | RXD | stepping motor | Autofocus | Linear motor | STM |
| Lens Type | - | zoom | zoom | zoom | zoom | prime |
| Compare | Compare | Compare | Compare | Compare |
| उत्पाद | AF | Bokeh | Build | Macro | Optical | Aperture | User Sentiment | Versatility | सामाजिक प्रमाण | Stabilization |
|---|---|---|---|---|---|---|---|---|---|---|
| Nikon Auto Focus-S FX TC-20E III Teleconverter | 53.6 | 63 | 63.2 | 96.7 | 20.9 | 64.5 | 16.3 | 33.8 | 66.8 | 36.8 |
| Tamron Di III 17-70mm f/2.8 Di III-A VC RXD Compare | 53.6 | 85.8 | 69.4 | 85.1 | 91.3 | 82.6 | 63.9 | 89.6 | 86.2 | 82.6 |
| Sigma Contemporary 28-70mm f/2.8 DG DN Compare | 87.2 | 85.8 | 74.5 | 95.1 | 95.6 | 82.6 | 0 | 77.5 | 86.2 | 36.8 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 53.6 | 80.5 | 86 | 50.8 | 86.7 | 82.6 | 63.9 | 80.6 | 86.2 | 97 |
| Sony E 18-135mm f/3.5-5.6 OSS Compare | 98.1 | 73.8 | 73.2 | 40.3 | 78.9 | 75.8 | 44.7 | 95.9 | 90.3 | 82.6 |
| Viltrox Pro AF 27mm f/1.2 Compare | 87.2 | 98.7 | 68.2 | 38.5 | 82.6 | 98.5 | 91.1 | 33.8 | 90.3 | 36.8 |
कीमत
Value & Pricing
At around $550, the value proposition is a bit of a tightrope walk. If you already own a 70-200mm f/2.8 or a fast super-telephoto prime, it's a smart investment that can save you thousands over a dedicated 400mm or 600mm lens. But if you're hoping to breathe new life into a consumer zoom, save your cash. You'll likely be disappointed by the dim viewfinder and mushy autofocus. It's a specialist's tool, not a universal booster.
और पढ़ें
Overview
The Nikon TC-20E III is a 2x teleconverter that doubles the reach of your compatible F-mount lens. It's a compact, relatively affordable way to get closer to the action without buying a whole new super-telephoto. But it's not magic. You lose two full stops of light, and it will absolutely punish any weakness in your lens or technique.
Common Questions
Q: Will this teleconverter work with my lens?
Compatibility is limited to specific Nikon AF-S and AF-I lenses, mostly fast telephoto primes and pro zooms. Check Nikon's official compatibility chart before buying, as it won't work with many older or consumer-grade lenses.
Q: How much light do I lose with this 2x converter?
You lose exactly 2 full stops of light. An f/2.8 lens effectively becomes an f/5.6 lens, which will impact autofocus performance and require slower shutter speeds or higher ISOs.
Q: Is the image quality better than just cropping my photo?
It depends on your camera. On older, lower-resolution bodies, the converter can pull more detail. But on modern high-megapixel cameras, many users find cropping delivers a cleaner, sharper result without the autofocus penalty.
Who Should Skip This
If you're shooting with a variable-aperture zoom like a 70-300mm f/4.5-5.6, skip this entirely. Your viewfinder will be painfully dark, and autofocus will likely fail. You're better off saving for a longer lens or using a 1.4x converter instead.
Verdict
The Nikon TC-20E III is a niche tool that excels in a very specific scenario: mounted between a pro DSLR and a fast, sharp telephoto prime. For the wildlife or sports photographer who needs maximum reach and knows how to manage the light loss, it's a solid performer. For everyone else, it's a compromise too far. The hit to autofocus speed and image quality will frustrate more than it delights.
