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Review: The Tamron 28-75mm f/2.8 for Sony FE is a Home Run

When Tamron announced the new FE 28-75mm f/2.8 Di III RXD, it sent a wave of excitement throughout the Sony user base. When Tamron announced that the lens would only be $799, most of those Sony users were shocked.

Can Tamron’s $799 lens compete against the $1,198 (currently $898 after rebate) Sony/Zeiss 24-70mm f/4? Can it hold its own against the $2,198 Sony FE 24-70 f/2.8 GM? How would Tamron’s first FE lens work on Sony bodies? We were lucky enough to get an early copy for a few days to try out.

Design

The 28-75mm f/2.8 has 15 elements in 12 groups, including several XLD, LD, and GM elements to help minimize aberration. Only 28mm on the wide end, it’s a compact lens weighing in at only a hair over 19oz (0.54kg) and measuring only 4.6in (11.7cm) long when at 28mm. For comparison, the Sony 24-70 f/2.8 GM is a hefty 31oz (0.88kg), and just under 5.5in (14cm) long.

The lens design is quite simple, with no AF/MF switch or any switches/buttons at all. A quarter turn of the rubber zoom ring will quickly take you from 28mm to 75mm, and the thinner, plastic trimmed focusing ring (focus by wire) is just behind it. The look is similar to Tamron’s recent lens releases with a black finish and a small champagne-gold ring around the base.

The lens features a new RXD stepping motor that allows for quick and accurate autofocus and is near silent, which is great for video users who don’t want to rely only on manual focus. The back of the lens has a seal around the base for moisture resistance, and the front element has coatings that help repel water and oil. While the lens is not made of metal like many of Tamron’s SP series lenses, the use of high-grade polycarbonate allowed Tamron to keep the lens as light as possible. The lens feels far from “cheap” and should withstand daily use with no issue.

While the Sony GM has a minimum focusing distance of 1.25 feet, and the Sony/Zeiss has a minimum focusing distance of 1.3 feet, the Tamron’s MFD is 7.5 inches at the wide end and 15 inches at the long end. That means at 28mm you can photograph an object that is only about 2.5” away from the front element! The photograph below was taken at 28mm and at the closest focusing distance.

Compatibility

Many people initially questioned how well the Tamron would work on Sony cameras. Most FE shooters have had to use adapters like the Sigma MC-11 or one of the various adapters from Metabones to shoot with 3rd party glass and would often lose certain features. Luckily for these people, the Tamron is compatible with Sony’ Eye AF, DMF, Fast Hybrid AF, and works with the in-camera lens correction. You can also update the firmware using the camera (no Tap-In console available at this time).

Real World Use

As with many pre-release lenses we get sent, the Cleveland weather decided to not cooperate and most of the time spent with the lens was during stormy/rain days. Most of the photos taken with the Tamron were with the Sony A7r III and Sony A9. The lens felt well balanced and the short zoom ring throw allowed for quick changes. While the Tamron is missing 4mm on the wide end compared to the Sony 24-70’s, it wasn’t a big deal most of the time. There were a few instances where I wished I could’ve shot an image a bit wider (no room to move back), but the majority of the photographs taken were between 50-75mm. Having used both of the Sony 24-70’s in the past, the performance and accuracy of the AF are definitely on par with them. It performs like a native lens and doesn’t have some of the downfalls that adapted lenses do. The is quick and responsive in most of the modes that I tested, and the face/eye AF switch seamlessly without any hunting. In very low lighting the lens would occasionally struggle to find focus on dark subjects but managed to find it after a quick scan throughout the focus range.

For video use, the new RXD motor works as advertised and is extremely quiet. In normal situations, the on-camera mic didn’t pick up any AF motor noise, and it could barely be heard in a silent room. The AF tracking is precise and should keep up with most situations. When zooming in/out the LCD displays some flickering in the corners, almost as if it’s some sort of vignette, but it doesn’t show up on the recorded video. Hopefully, this is something that can be corrected via a firmware update.

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August 2018
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