The Tamron 17-28mm f2.eight Di III RXD (mannequin A046) is a small and light-weight non-stabilized wide-angle zoom lens with a relentless f2.eight focal ratio that’s designed for Sony E-mount full-frame cameras. Introduced in June 2019 it properly enhances Tamron’s 28-75mm f2.eight Di III RXD commonplace zoom from 2018. Crucially, it’s lower than half the worth of Sony’s high-end FE 16-35mm f2.eight G Grasp. Certainly price-wise, it’s closest to Sony’s FE 16-35mm f4.Zero ZA, a Zeiss design that’s s entire cease slower in aperture. However then each Sony lenses supply an extended zoom vary.
To seek out out whether or not the brand new Tamron 17-28mm f2.eight Di III rightfully earns a advice I examined it on the 42MP Sony A7R II physique and in an replace coming quickly I’ll examine it towards the Sony FE 16-35mm f2.eight GM. So in the event you’re all for how Tamron’s new wide-angle zoom lens performs, you’ve come to the suitable place!
Information from the catalog
As common I’ll take a look on the technical knowledge of the brand new Tamron 17-28mm f2.eight Di III first. I’ve rated the options with a [+] (or [++]), when it’s higher than common and even state-of-the-art, a  if it’s commonplace or simply common, and [-] if there’s a drawback. For comparability I exploit the Sony FE 16-35mm f2.eight GM (“Sony GM” for brief) and the Sony FE 16-35mm f4.Zero ZA OSS (“Sony ZA”).
Measurement (diameter x size): 73 x 99mm (2.9 x 3.9in.) plus 25mm for the lens hood which is 87mm in diameter. Zooming doesn’t change the size of the lens. The Sony GM is far bigger at 89 x 122mm, the Sony ZA is 78x99mm, each with out lens hood. [+]
Weight: 420g (14.eight oz.) plus 22g for the lens hood. That is fairly gentle for an f2.eight zoom lens. The Sony GM is 680g + 31g lens hood, the Sony ZA is 518g + 31g lens hood. [+]
Optics: 13 components (together with Three particular dispersion and three aspherical components) in 11 teams much like the Sony ZA (12/10). The Sony GM has a extra advanced optical design (16/13). [+]
Closest focus distance is 0.23m (9.1in.) with a magnification of 1:4.5 at 28mm focal size utilizing handbook focus. That is fairly good however you’ve got a working distance of solely 11cm (4.3in.). On the broad finish the brand new Tamron even goes right down to 1:4.Three however naturally the working distance shrinks even additional to a meager 6cm (2.4in.). A magnification of 1:10 is achieved at 0.38m (1.2ft.) giving a working distance of 0.23m (9.1in.) with lens hood connected. The Sony GM and the Sony ZA obtain a magnification of 1:5.Three at 0.28m. [+]
Filter-thread: 67mm which is far smaller and cheaper than the 82mm filters the Sony GM wants. The Sony ZA makes use of 72mm filters. [+]
Picture stabilization: The lens itself gives no optical stabilization identical to the Sony GM. However trendy Sony our bodies present built-in sensor-shift stabilization over 5 axis. The Sony ZA has its personal optical stabilization. 
Auto focus: Sure. Guide-focus override is by merely turning the main target ring. The main focus ring has a variable gearing that enables for very exact handbook focus when turned slowly. Sadly this makes clean focus pulling for videographers fairly laborious. The Sony GM has a further focus maintain button. [+]
Covers full body or smaller. Similar with the competitors. [+]
Value: The brand new Tamron is listed at 1000 EUR (incl. 19% VAT) / 900 USD. That is lower than half the worth of the Sony G-Grasp which works for a whopping 2240 EUR / 2200 USD whereas the Sony ZA comes at 1050 EUR / 1350 USD. [+]
Comes with out pouch/strap however the lens hood is included and reversible for transport. The Sony GM and ZA have a pleasant lens case. 
Aperture ring: No, identical to the Sony GM and ZA. 
Sealing: sure, a rubber grommet on the lens-mount plus additional weather-sealing all through the development and fluorine coating on the entrance lens for simpler cleansing. Much like the Sony GM and ZA. [+]
The rating within the “features-department” is 0[-]/3/9[+]. So the lens has an excellent characteristic set. Particularly noteworthy is its small measurement and weight contemplating its fixed f2.eight focal ratio. Tamron touts that carrying each their 17-28/2.eight plus their 28-75/2.eight zoom lenses is lower than 1 kg. Each lenses even have the identical lens cap and filter measurement. However Tamron is giving up on zoom vary which is just 17-28mm versus the extra common 16-35mm. So the Tamron’s narrowest angle of view is 75 levels versus 63 levels of the alternate options reaching 35mm focal size.
There is no such thing as a actual match for Tamron’s new lens. However a classical different are 16-35mm zooms of which each and every massive digital camera producer has not less than one model. All of them have the additional advantage of that additional 7mm (25%) attain:
- Sony has the FE 16-35mm f2.eight GM from 2017 for 2020 EUR / 2200 USD. It’s one in all Sony’s G-Grasp, or GM, lenses, boasting the corporate’s finest optical high quality to this point. See Gordon’s Sony FE 16-35mm f2.eight GM review-so-far which I’ll be updating to a full evaluate shortly.
- Should you don’t want a focal ratio of f2.eight Sony additionally gives the stabilized FE 16-35mm f4.Zero ZA OSS promoting for 1050 EUR / 1350 USD. However that lens continues to be longer by 1cm and heavier by 100g than Tamron’s new zoom.
Or you may go for ultra-wide angle zooms instead:
- The Sigma Artwork 14-24mm f2.eight DG DN is an authentic mirrorless design for E-mount which ought to quickly be obtainable (1530 EUR / 1400 USD). It’s the largest (85x131mm) and heaviest (795g) different. This lens is to not be mistaken for the Sigma Artwork 14-24mm f2.eight DG HSM, a DSLR design from 2018 which is far bulkier and heavier nonetheless.
- Go even wider with Sony’s FE 12-24mm f4.Zero GM from 2017 (1700 EUR/USD). The lens is 87x117mm and weighs 565g. For extra info and pattern pictures take a look at Gordon’s Sony FE 12-24mm f4G evaluate thus far.
With each ultra-wide angle zoom lenses you lose 4mm (15%) attain on the lengthy finish in comparison with the brand new Tamron. However for that you simply acquire 10 levels (Sigma) resp. 18 levels (Sony) angle of view on the brief finish. And that additional protection may be very seen. Remember although that because of the bulbous entrance factor each ultra-wide zooms can not use commonplace filters.
Right here is the angle of view that the brand new Tamron 17-28mm f2.eight Di III covers with its 1.6x zoom:
Focus and zoom
Focus accuracy and repeatability is essential to persistently produce sharp pictures. Repeatability (the accuracy of concentrate on the identical topic after repeated focus-acquisition) of this lens at 28mm focal size is nice (measured 97.2% in Reikan FoCal) with no outliers over a sequence of 40 pictures on a A7R II. There may be some focus variation with the lens hitting the (focus-) mark higher when coming from a better distance. That might in all probability be cured with a little bit of AF micro adjustment. At 28mm focal size the lens focuses rapidly in round 0.5 sec from infinity to 0.38m (1:10 magnification).
The zoom ring turns by way of 65 levels the best way Sony customers are used to and has a 31mm broad rubber floor with grip. It turns fairly stiff and may hardly be operated with one finger. The main focus ring is 13mm broad and is situated nearer to the digital camera. It strikes very easily and may simply be operated with one finger.
AF-operation of the brand new lens and picture stabilization of the A7R II is inaudible from the skin and whenever you document video with the built-in microphone. As you pull focus, you’ll discover some focus respiratory: the picture turns into slightly extra magnified at nearer focusing distances. When I adjusted the main target from infinity to 0.38m (1:10 magnification) on the brand new Tamron at 28mm focal size, I measured a 2% enhance in magnification. The identical take a look at at 17mm focal size did solely produce a 1% enhance. So the brand new Tamron produces little or no focus respiratory when recording video.
Subsequent take a look at my high quality outcomes!
Verify costs on the Tamron 17-28mm f2.eight Di at B&H, Adorama or WEX. Alternatively get your self a duplicate of my In Digicam guide or deal with me to a espresso! Thanks!