Tamron Di III F051 20mm
Weighing just 215g and sealed against moisture, this lens pairs a 1:2 maximum magnification with a 4.7-inch minimum focus distance for near-macro versatility in a compact full-frame design. Its optical formula uses three ED and one aspherical element to control aberrations, while the f/2.8 aperture keeps the build remarkably portable and discreet. This lens is best for hikers and travel photographers who want a lightweight wide-angle prime that can also capture detailed close-ups of flora and fauna.
Snapshot
The 30-Second Version
Price dropped to $199, which is nice. Score tanked to 59 thanks to stronger rivals. Only worth it if you catch a sale and have zero wiggle room in your budget.
What owners think
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews - so you can see whether early praise held up.
- Q2 202686/100
Buyers praised the lens as sharp, budget-friendly, and versatile for microphotography and landscapes. Some noted autofocus finickiness with nearby objects and motor noise in video.
- Sharp image quality, especially at f/3.5 to f/5.6, and good for microphotography.
- Great value for money, lightweight, and versatile across Sony camera bodies.
- Autofocus can be finicky with nearby objects but works well for landscapes.
- Motor noise audible on camera mic during video autofocus, though not an issue for filmmakers.
- Q2 202483/100
Buyers praised the lens for being lightweight, high quality, and affordable, with good detail capture for wide-angle use. One noted slow autofocus but acceptable for landscapes.
- Lightweight and good quality at a decent price.
- Captures details well for wide-angle and video work.
- Autofocus not the fastest, but fine for landscapes.
- Affordable lens suitable for casual and travel use.
- Q4 202280/100
Buyers praised the lens as sharp, lightweight, and great value, but noted autofocus noise in video and poor low-light performance.
- Excellent image quality and sharpness, even on high-resolution sensors.
- Great value for the price, often described as a steal.
- Autofocus is loud during video, potentially picked up by on-camera mics.
- Poor performance in low light conditions.
- Q2 202293/100
Buyers praised the lens for close focusing, light weight, affordability, and sharp center, with minor chromatic aberration noted.
- Close focusing ability and 1:2 ratio appreciated for unique perspectives.
- Lightweight and affordable, considered a good value.
- Sharp center and universal 67mm filter size liked.
- Some chromatic aberration present but not severe.
- Q1 2022100/100
Buyers praised the lens as affordable, well-built, and sharp with good bokeh. One wished for a faster aperture.
- Affordable price point praised by multiple buyers.
- Sharp image quality and good bokeh at f2.8.
- Solid build quality and well-constructed feel.
- Wish for faster aperture (f2.0 or f1.8) while keeping 67mm filter size.
- Q2 202185/100
Buyers praised the lens for its sharpness, compact size, and value. Some noted autofocus noise but found it acceptable for stills.
- Sharp image quality, true colors, and minimal barrel distortion.
- Compact, lightweight, and affordable for a wide-angle prime.
- Autofocus noise noted; acceptable for stills but problematic for video.
- Close focusing ability praised, useful as a macro alternative.
- Q1 202167/100
Buyers praise the lens for being light, sharp, and affordable, but two report a very tight fit that raises concerns about using it on expensive camera bodies.
- Lightweight, sharp, fast autofocus, and good value for the price.
- Very tight fit on camera bayonet; concern about mounting a cheap lens on a costly body.
- Metal mount and overall build quality are appreciated for the price.
- Some buyers are very satisfied with Tamron lenses in general, but this one has fit issues.
- Q4 2020100/100
All four reviews are highly positive, praising the lens as excellent, well-built, and a great budget option for Sony e-mount, with one noting a noisy focus motor.
- Lens is excellent, well-built, and delivers sharp images.
- Great budget option for Sony e-mount, especially with close focusing macro.
- Works perfectly with Sony a7II, high quality optics.
- Focus motor is noisy but manageable with external microphone for video.
- Q3 202087/100
Buyers praised the lens as a good value for its price, noting sharpness and macro capability, but some mentioned slow autofocus.
- Great value for the price, especially on sale.
- Sharp images but autofocus is sluggish.
- Good for astrophotography and landscapes.
- Some wished for wider aperture like f/1.8.
Based on 81 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Specifications
Full Specifications
Optics
| Type | Prime |
| Focal Length Min | 24 |
| Focal Length Max | 24 |
| Elements | 10 |
| Groups | 9 |
| Aspherical Elements | 1 |
| ED Elements | 3 |
| Coating | Fluorine Coating |
Aperture
| Max Aperture | f/22 |
| Min Aperture | f/2.8 |
| Constant | Yes |
| Diaphragm Blades | 7 |
Build
| Mount | Sony E |
| Format | full-frame |
| Weather Sealed | Yes |
| Weight | 0.2 kg / 0.5 lbs |
| Filter Thread | 67 |
AF & Stabilization
| AF Type | OSD |
| Stabilization | No |
Focus
| Min Focus Distance | 119 |
| Max Magnification | 1:2 |
vs Competition
The budget superzoom field just got crowded. The Sigma Contemporary 16-300mm f/3.5-6.7 DC OS and Tamron Di III 18-300mm f/3.5-6.3 Di III-A VC VXD now lead the pack with sharper optics and faster AF. Nikon's NIKKOR Z 28-400mm f/4-8 VR and the Panasonic LUMIX G Leica DG Vario-Elmarit H-ES50200 also push this lens further down the list. Even the aging Canon EF-S 18-135mm f/3.5-5.6 IS USM holds its own. This lens now fights for scraps at the bottom of the top tier.
| Spec | Tamron Di III F051 20mm | Nikon NIKKOR Z 17-28mm f/2.8 | Sigma Contemporary 16-28mm f/2.8 DG DN | Panasonic Leica DG Vario-Elmarit H-ES12060 | Sony FE 24-240mm f/3.5-6.3 OSS Full-Frame Telephoto Zoom | Altura Photo NIKKOR YZ0308 |
|---|---|---|---|---|---|---|
| Focal Length | 24mm | 17-28mm | 16-28mm | 12-60mm | 24-240mm | - |
| Max Aperture | f/22 | f/2.8 | f/2.8 | f/2.8 | f/3.5 | f/3.5 |
| Mount | Sony E | Nikon Z | Sony E | Micro Four Thirds | Sony E | Screw-on lens fits camera lenses with a 55mm front filter thread |
| Stabilization | false | false | false | true | true | true |
| Weather Sealed | true | true | true | true | true | false |
| Weight (g) | 215 | 450 | 450 | 320 | 780 | 320 |
| AF Type | OSD | Stepping Motor | Stepping AF Motor | linear motor | Linear motor | STM |
| Lens Type | prime | zoom | zoom | zoom | zoom | wide-angle |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Tamron Di III F051 20mm | 53.7 | 13.8 | 91.5 | 92.4 | 71.2 | 21 | 33.3 | 81.1 | 37.7 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 87.4 | 87.1 | 76.1 | 85.8 | 88 | 84.3 | 67.3 | 69.6 | 37.7 |
| Sigma Contemporary 16-28mm f/2.8 DG DN Compare | 87.4 | 87.1 | 76.1 | 77.8 | 97.2 | 84.3 | 67.9 | 63.6 | 37.7 |
| Panasonic Leica DG Vario-Elmarit H-ES12060 Compare | 98.1 | 87.1 | 84.6 | 51.7 | 91 | 84.3 | 93.1 | 68.6 | 83.3 |
| Sony FE 24-240mm f/3.5-6.3 OSS Full-Frame Telephoto Zoom Compare | 98.1 | 75.5 | 54.6 | 37.2 | 95.7 | 77.5 | 97.2 | 85.4 | 83.3 |
| Altura Photo NIKKOR YZ0308 Compare | 87.4 | 75.5 | 73.8 | 96.1 | 45.1 | 77.5 | 33.3 | 72.3 | 83.3 |
Price
Value & Pricing
At $199 on the low end, this lens finally makes sense. The old $249 floor felt like a tax on beginners. Now you can grab it for under two bills and get a solid starter zoom. The high end still hits $368, which is less exciting, but the new entry price changes the math. If you shop smart and snag a deal, the value proposition flips from "meh" to "worth a look."
B&H Photo 1 offer From CA$346
We started tracking prices for this product on Jun 4, 2026. The chart appears once we have more data.
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Verdict
A price drop can't fix everything. The new $199 starting point helps, but a 59 score tells the real story. Better glass from Sigma, Tamron, and Nikon leaves this lens feeling dated. If you find it on deep discount and just need reach on a tight budget, maybe. Otherwise, spend a little more and get a modern superzoom that doesn't feel like a compromise.
