Tamron 20-40mm f/2.8 Di III VXD Review: Tiny Yet Mighty

Tamron’s pattern of creating atypical focal size lenses continues with the brand new 20-40mm f/2.8 Di III VXD lens. Like earlier lenses in its “Frankenfocal” class, this new one is successful in every thing that issues, from dimension, to decision, to cost.

Creator’s Notice: Along with my evaluate under, my hands-on video, above, has extra ideas, pattern photographs, and pattern video.

The 16-35mm focal size is among the must-have ranges for photographers, as this focal vary runs from ultra-wide angle to just about “commonplace” and permits it to cowl a variety of capturing conditions. Due to this, for some photographers, it’s extra common than a 24-70mm. So with that in thoughts, 20-40mm focal size of the brand new Tamron 20-40mm f/2.8 Di III VXD is a little bit of an odd one.

Whereas 20-40mm is a contact longer than the venerable 16-35mm, it feels extra versatile because of the added vary on the lengthy finish and would higher swimsuit many photographers that use the venerable 16-35mm class.


For these with a high-end 24-70mm lens, the 20-40mm is extra redundant than the 16-35mm focal size, however for these in search of a single lens to deal with wide-angle-to-portrait distances and to take action in a small bundle, the Tamron 20-40mm is a good alternative.

To be extra particular, the 20-40mm Tamron is an efficient alternative for the photographer in search of an alternative choice to proudly owning each a 16-35mm and a 24-70mm lens or the shooter in search of a backup lens to take when bringing each a 16-35mm and a 24-70mm isn’t sensible.

For instance, after I journey with my household, I usually search for a small and compact lens since I hate drawing consideration with lengthy and pricy glass. I often shove my digicam right into a bag together with my household’s sweaters or water bottles, and having an costly piece of glass in a bag with snacks and garments can result in broken glass. I just lately scratched the floor of my 24-70mm GM II on a visit, and it’s a slight damage that breaks my coronary heart.

Whereas a $700 lens isn’t disposable, having some put on and tear on a lens at that value level is extra bearable than on a $2,300 lens.


Tamron says of the 20-40mm f/2.8 Di III VDX, “the lens begins from 20mm on the ultra-wide-angle finish and covers as much as 40mm in the usual focal vary.” I’m not satisfied {that a} 20mm lens is really “ultra-wide,” however it’s large sufficient for many scenes—extra on this in a second.

The VDX within the identify means the drive makes use of the corporate’s linear Voice-coil eXtreme-torque Drive, Tamon’s newest mirrorless linear motor design. Linear motors are important in mirrorless lenses as they reply higher to the speedy back-and-forth focus monitoring that comes with full-time topic monitoring.

In capturing, the lens is quick to focus, although that’s usually the case with wide-angle lenses as they don’t have to maneuver massive optics round. Even on the 40mm vary, eye detection is close to instantaneous and monitoring is excellent.

Tamron refers back to the physique as having a “high-quality end,” although it feels fairly commonplace for a primarily plastic lens.

Contained in the barrel is a nine-blade aperture, and the weather use Tamron’s new BBAR-G2 coating (Broad-Band Anti-Reflection) to cut back flaring and ghosting. Throughout testing, I usually shot instantly into the solar, and whereas there was some lens flare with intense solar flares, these aberrations have been absent in practically all intense lighting scenes.

The lens is constructed of 12 parts organized in 11 teams and contains aspherical and LD (Low Dispersion) parts. The minimal focusing distance is 6.7 inches, and on the 20mm finish, the lens can do a 1:3.8 shut focus ratio.

That is all to say that the construct high quality and optical efficiency of this $700 lens punch manner above its weight. And at 365 grams (12.9 ounces), that’s each literal and figurative.

Journey Dimension

The Tamron 20-40mm f/2.8 is designed to be compact; Tamron explicitly mentions the scale and weight of its product and advertising supplies as a significant profit. The lens comes at 365g (12.87 ounces) and is 85.5 x74.4 mm (3.41 inches x 2.93 inches).

The small dimension and lightweight weight make it an ideal all-around journey lens. I paired the lens with the Alpha 1 and a7C, and particularly on the diminutive a7C, it makes an amazing, inconspicuous lens.

When touring recreationally, I desire a small and cheap lens — it’s one of many causes I’ve traveled on household journeys with the Tamron 28-75mm as an alternative of my 24-70mm GM II. The 20-40 is an efficient journey companion priced a few third as a lot as a 16-35mm GM. I’m not involved if it will get scratched.

To be clear, the Tamron doesn’t change or exceed the efficiency of lenses like Sony’s GM or Sigma’s ART lenses, however it’s not designed to both. The efficiency is manner higher than anticipated at this value level, which appears to be the case with most of Tamron’s latest lenses.

The affordable retail value additionally permits many photographers to purchase this lens and complement it with a 12-24mm and nonetheless are available in decrease than the worth of the Sony 16-35mm GM.

Taking pictures Expertise

I used to be skeptical after I began reviewing the Tamron 20-40mm f/2.8. I’ve bought a 12-24mm and a 16-35mm lens as a part of my arsenal, together with the standard 24-70mm lens present in nearly everybody’s bag. I additionally used the unique 28-75mm from Tamron, which I wasn’t thrilled with, although I discovered it to be a ok performer at its value.

However I’ve just lately used the Tamron 70-300mm in Africa, and my son (who’s 12) used the lens to seize wildlife and nailed practically each shot.

Having loved that capturing expertise, I used to be notably excited with the efficiency of the 50-400mm F/4.5-6.3 Di III VC VDX. In that evaluate, I used to be stunned by the efficiency of such a cheap all-in-one lens. Tamron has upped its high quality just lately with out a commensurate value enhance.

This brings me again to the Tamron 20-40mm and my preliminary skepticism. Whereas the focal size appeared a bit jack-of-all-trades-master-of-none, I used to be blissful to attempt it as a result of I’ve been impressed with different Tamron lenses of late.

As of this writing, it’s heading towards the tip of fall foliage season in New York State and one of many nicest occasions to {photograph} with a wide-angle lens. Often, I’d head into the woods with a 16-35mm and a plan to leaf peep, however this time I took the 20-40mm.

I can’t say that there’s something I didn’t get to seize as a result of I used to be capturing 20mm and never 16mm. There actually is a few missed width — 4mm on the wider finish has a way more important impact than 4mm on the longer finish, which is why a 12mm lens has a a lot totally different area of view than a 16mm lens.

That lack of width felt inconsequential with this lens. Something I had needed to shoot wider would have been higher captured on a 12-24mm anyway.

I photographed many stands of bushes the place sometimes with ultra-wide lenses, the trunks of the bushes would seem to warp. However with the 20mm, they maintained a wonderful perspective line. At 40mm, there was no noticeable curvature.

From a picture high quality standpoint, the photographs from the Tamron 20-40mm f/2.8 are very good. I used to be notably impressed with the backlit pictures as they appeared free from two issues I’ve observed crop up in a number of Tamron lenses.

The very first thing I observed is that the standard blue forged that I noticed within the 70-300mm and the 28-75mm are gone on this lens (the blue coloration forged is absent within the 50-400mm as properly.) The second enchancment is the wonderful dynamic vary and distinction in these photographs. Backlit leaves and trunks in shadows may end up in very high-contrast pictures, and on some Tamron lenses, I’ve discovered the distinction to be overly pronounced, even when capturing uncooked and recovering highlights in put up.

Picture High quality

The Tamron 20-40mm photographs are wealthy, saturated, detailed, and sharp. They’re not precisely on par with pictures from Sony’s 24-70mm f/2.8 GM II, however not noticeable sufficient that the $1600 value distinction doesn’t make the Tamron lens the plain alternative.


Solar flare on this lens is especially pretty, and solely in a couple of pictures did the starbursts end in lens flare aberrations. A typical greenish tint and spotlight are obvious within the starburst strains, however this didn’t occur in all the pictures, and it occurred in none of my movies of the identical scene.

I additionally shot with the lens in New York Metropolis and examined it on structure and road scenes. With the good element of buildings as the topic, some softness is clear on the edges. Edge sharpness is a tradeoff for a lens with this value level, because the design has (by nature) fewer parts designed to fight distortion on the corners.

As anticipated, edge sharpness improves noticeably because the lens is racked to longer focal lengths. Portrait pictures are notably pleasing, the round aperture renders very pleasing bokeh, and the lens focuses extremely shortly, no less than when paired with my take a look at Sony Alpha 1.

The 40mm focal size makes portraits look extra “pure” than a 35mm (though simply marginally) because the elevated attain reduces distortion on a topic’s face. This versatility makes me wish to choose the 20-40mm focal size over my commonplace 16-35mm.

Whereas I wouldn’t suggest this as a macro lens, the comparatively shut focusing distance and good closeup magnification make this a wonderful lens for smaller scenes, giving it one other beneficial trick to make it value including to your digicam bag.



Most wide-angle lenses have autofocus starting from acceptable to nice, partly as a result of fewer calls for are positioned on an AF system at wider focal lengths.

The Tamron 20-40mm f/2.8 leans towards “glorious” and could be very fast when utilizing Sony’s EyeAF and Actual Time Monitoring. Tamron’s growth of its VDX linear motor has stepped up (pardon the pun) the focusing skills of the lenses outfitted with this motor. I’ve discovered all of them to have well-above-average accuracy.

Beforehand, AF pace was one of many tradeoffs when utilizing third-party lenses. Nonetheless, the brand new Tamron lenses have radically improved the efficiency of AF, which ends up in extra correct focus and a a lot increased hit fee.




I’ve additionally been utilizing the Tamron 20-40mm for YouTube work, and it’s now my favourite studio lens. The vary of focal lengths makes it excellent for large pictures and tight product demonstrations, and the 20mm focal size ends in round a 28mm size when capturing in Tremendous 35.

Since 28mm lies proper contained in the 20-40mm full-frame focal size, the lens is ideal for switching between my full-frame and APS-C our bodies and nonetheless with the ability to preserve the identical obvious focal size.

In-field video work has additionally resulted in glorious footage (see the YouTube video above for some samples). Nevertheless, the dearth of built-in picture stabilization implies that dealt with footage advantages from lively stabilization, the usage of a gimbal, or post-processing picture stabilization.

That is another excuse why the 20mm wide-angle focal size is so useful, because it’s attainable to crop (for lively stabilization) or stabilize in put up to make easy footage with out getting too near a topic.

Bells and Whistles

At its $700 value, some issues are noticeably — although not problematically — lacking from the Tamron 20-40mm.

Of be aware, the lens barrel has solely a spotlight ring and a zoom proper. There is no such thing as a AF/MF choice swap, handbook aperture dial, and focus-hold button. The shortage of an AF/MF swap detracts from utilizing the lens. In panorama work, I usually swap from auto to handbook focus, and whereas I’ve focus mode set to toggle by way of a programmable button, that is the one lens I’ve the place I would like to make use of a controller as an alternative of a swap.

I’ve (virtually) by no means used the main focus maintain button on a lens to set off focus maintain, however I exploit the programmable focus maintain buttons’ programmable options to begin issues like switching AF modes. Once more, at this value, it’s not a big omission.

The Tamron 20-40mm does function a TAP-in-Console connector port for the corporate’s lens dock. This port permits firmware updates and customized programming to be utilized shortly and simply. This looks like a conspicuous entry level for liquids and mud however is in any other case a great way to permit for firmware updates because it’s inconceivable to improve third-party lenses by way of the digicam’s interface.

The main focus and zoom dials are the one issues adorning this lens; each are massive and straightforward to seize. The main focus ring, as is the case with mirrorless lenses—is “fly-by-wire” and easy with out being unfastened.

The focal size ring has a claimed 65-degree throw, and though it feels extra like 90 levels, it’s snug and straightforward to regulate, even with just one hand.

One Of The Greatest “Large” Zooms

The flexibility of the Tamron 20-40mm F2.8 Di III VXD makes it a wonderful alternative for a photographer, videographer or hybrid shooter in search of an inexpensive, quick lens with glorious picture high quality.

If you happen to already personal a 16-35mm lens can skip the Tamron 20-40mm F2.8 Di III VDX except you’re in search of a succesful walk-around lens that doesn’t change picture high quality for compactness.

Do you have to be available in the market for a 16-35mm lens, the Tamron 20-40mm is a greater choice, particularly when you have flexibility within the wide-angle vary. The lens is a superb mixture of value, efficiency, and dimension, and whereas it lacks bells and whistles, it packs glorious picture high quality into its tiny physique.

Are There Alternate options?

There are many 16-35mm lenses in the marketplace, however there aren’t 20-40mm alternate options. For a photographer needing the additional 4mm area of video on the large finish, any 16-35mm lenses can be a greater various, and for somebody that desires to go super-duper-wide, a 12-24mm lens can be a extra sensible choice.

The energy of this lens is just not the wide-angle focal size however the well-rounded zoom vary and its versatility at each the large and commonplace finish of the focal lengths. In these areas, there isn’t a viable various in a single unit at an analogous value.

Ought to You Purchase It

Sure. The $700 value places this lens into the vary of nearly any full-frame photographer, and whereas I don’t assume it’s a good suggestion to guage lenses based mostly on their value alone, the worth per greenback of this lens is among the highest you could find.

Disclaimer: David Schloss was previously the media relations supervisor for Sony’s Alpha division. Whereas this makes him extra aware of the system, his opinions are his personal, are backed by PetaPixel’s editorial workforce, and should not swayed both for or towards the corporate. Earlier to his time with Sony, Schloss racked up extra 20 years of journalistic expertise and he takes his integrity significantly.

Leave a Reply

Your email address will not be published. Required fields are marked *