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Tamron 28-75mm F/2.8 Di III VXD G2 Lens Review

John Riley has been putting the 28-75mm f/2.8 Di III VXD G2 standard zoom lens from Tamron to the test.

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Tamron 28-75mm F/2.8 Di III VXD G2 Lens Review: Tamron 28 75mm G2 Front Oblique View | 1/6 sec | f/16.0 | 100.0 mm | ISO 100

Here we have an updated version of Tamron's highly rated 28-75mm f/2.8 standard zoom lens. It is intended for Sony full-frame mirrorless cameras, but of course, could also be used on the crop sensor APS-C format bodies. In this latter case, the "35mm equivalent" field of view would be around 42-112.5mm and it becomes a wide standard to short telephoto. For this review, coupling the lens up with the 42MP Sony A7R III full-frame body, we have an attractive and very usable range of focal lengths for a wide variety of subject matter. Let's see how the lens handles in the field and how it performs in the technical tests.


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Tamron 28-75mm F/2.8 Di III VXD G2 Handling and Features

Tamron 28-75mm F/2.8 Di III VXD G2 Lens Review: Tamron 28 75mm G2 On Sony A7RIII | 1/6 sec | f/16.0 | 48.0 mm | ISO 100

This is a reasonably compact lens, weighing in at a modest 540g. There is a supplied bayonet fit lens hood that clips securely into position. No locking catch is needed. Within the bayonet fitting for the hood is a conventional 67mm filter thread.

The zoom ring extends the length of the lens as we zoom in but this does not disturb the balance. Focal lengths of 28mm, 35mm, 50mm and 75mm are clearly marked, and are accurate. The grip is excellent and the amount of resistance when zooming is just right.

The focus set button is positioned between zoom and focus rings and enables focus lock as default, but this can be set to other functions when the lens is connected to a computer with the TAMRON Lens Utility App. Connection is via a USB Type-C connector on the lens. Tamron sells a specific USB connection lead for this purpose and specifies that this should be used.


Tamron 28-75mm F/2.8 Di III VXD G2 Lens Review: Tamron 28 75mm G2 Rear Oblique View | 1/4 sec | f/16.0 | 88.0 mm | ISO 100

The focus ring is electronic and as utterly smooth in operation as we would expect. The usual Sony focus settings are accessed via the camera menu, including DMF (Direct Manual Focus, where MF can be used whilst AF is active) and MF. Tamron quote “minimum object distances” as follows:

  • Wide: 0.18m (7.1 inches) for a maximum magnification of 1:2.7
  • Tele: 0.38m (15 inches) for a maximum magnification of 1:4.1

This does enhance the usability of the lens, being not quite macro distances but still very usefully close. The AF is virtually silent and locks on accurately and efficiently, utilising Voice-coil eXtreme torque Drive motor. It is claimed to be twice as fast as the previous RXD lens.

Optical construction is 17 elements in 15 groups, including 1 LD (Low Dispersion) and 1 Glass Moulded Aspherical. There are 9 diaphragm blades to improve bokeh. The front element is fluorine-coated to repel dirt, grease and moisture and the lens as a whole is moisture resistant.

Tamron 28-75mm F/2.8 Di III VXD G2 Lens Review: Tamron 28 75mm G2 Rear Element View | 1/4 sec | f/16.0 | 78.0 mm | ISO 100

There is no doubt this is a great lens to use, fast, efficient and reliable. The focal length range might be a little curtailed and it would have been nice to extend to 24mm or perhaps a little further to 105mm, but on the other hand, the constant f/2.8 maximum aperture could well be more than enough compensation for that.

The USB-C connection is also a great idea, enabling other functions to be assigned and also giving a straightforward method of updating the lens firmware.


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13 May 2022 10:50AM
Why extend the Tamron 28mm-70mm to 105mm, when 85mm would be more than good enough, and most photographers buy prime
105mm Macros for very sharp results, anyway. Shouldn´t a 2.5X zoom be a bit sharper, lighter, and cheaper than an, almost 3X zoom?
6 Sep 2022 7:45AM
The lens is very good at the wide end, but your measurements look unreal. Other tests say: 92 lp/mm in the center and 71 lp/mm at the edges.
6 Sep 2022 7:55AM
You are citing two different forms of measurement, a bit like saying that 20 degrees C looks odd because we can measure 68 degrees F. LW/PH is line widths per picture height, a long way from line pairs per mm.

Hope that helps!
6 Sep 2022 6:12PM
It doesn`t - because it`s pretty obvious that the lens isn`t nearly as sharp at the edges, as it is in the center. That*s what I see, whenever I use it, and that`s what any other test says. And your measurement doesn`t reflect that. According to your data, this consumer zoom lens is better at 24mm from f2.8 to f5.6, than the 24mm f1.4 primes from Sony and Sigma. I`d say that`s physically impossible..
6 Sep 2022 6:32PM
Dear Roseblood, it may be possible based on actual comparisons between a 1.4, which you didn´t say was shot at 1.4, or?
I think it is possible for a newly produced 24-70 zoom at 24mm, at 5.6 than an older model of a prime at 1.4. It depends on what
you read and/or get your information. If you had any 24mm 1.4 from Sony or Sigma and actually made a comparison test against
a zoom at 24mm 5.6.
I wouldn´t doubt you and make this comment, except for the fact that you have not shown any proof, or reason other than
an educated opinion, at best.
7 Sep 2022 2:06PM
Watch John`s tests of the 24mm f1.4 primes from Sigma and Sony, and the Sony 24-70 II, for example. Or the Sony 28mm... According to his own tests, the Tamron zoom is the best wide angle lens in the whole system, between f2.8 and f5.6. Some are a bit sharper in the center, but much worse at the edges. And this CAN´T be true. And as I mentioned before, I own the Tamron. It`s really sharp from center to edge at F5.6, but the corners are visibly weaker at f2.8 and f.4. And that`s exactly, what everybody would expect, right? And it`s exactly, what other tests say. See Sony Alpha Blog or

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