Tamron 70-300mm f/4.5-6.3 Di III RXD - Sony FE

The Tamron 70-300mm f/4.5-6.3 Di III RXD (Model A047) is a lightweight 545g telephoto zoom for Sony full-frame and APS-C E-mount cameras, covering 70–300mm with RXD autofocus, a 9-blade aperture, 0.8m minimum focus distance, and a 67mm filter thread — no image stabilisation on board, but sharp results from the widest aperture settings.

Key Specifications

• Focal length: 70–300mm
• Maximum aperture: f/4.5 (wide) / f/6.3 (tele)
• Minimum aperture: f/32
• Aperture blades: 9
• AF motor: RXD (Rapid eXtra-silent stepping Drive)
• Lens mount: Sony E (full-frame and APS-C compatible)
• Filter thread: 67mm
• Minimum focus distance: 0.8m
• Image stabilisation: None (relies on in-body IS)
• Weight: 545g

What makes the Tamron 70-300mm f/4.5-6.3 Di III RXD special?

At 545g, this lens punches well above its weight class for a full-frame telephoto zoom. The clean, minimalist barrel — no switches, no buttons, just a zoom ring and a focus ring — keeps the design straightforward, but don't let that fool you into thinking corners were cut where it counts.

Sharpness is the headline story. On-axis performance is excellent even at the widest aperture settings, and at 200mm the sweet spot lands around f/5.6–f/8. Reviewers consistently note that the Tamron 70-300mm Di III RXD outresolves the Sony FE 70-300mm f/4.5-5.6 G OSS — a lens that typically costs considerably more — making the Tamron a genuinely compelling choice for anyone buying into the Sony ecosystem on a budget.

The RXD autofocus motor is quiet and fast, which matters a lot for wildlife and sports. There's no optical image stabilisation built in, so you'll want a Sony body with IBIS (like the Sony Alpha 7 IV or Sony Alpha 6700) to get the steadiest handheld results at the long end. On APS-C bodies, the effective reach stretches to 450mm equivalent, which opens up serious birding and sports possibilities from a very compact package.

If you're comparing options in the telephoto zoom space, the Sony FE 70-300mm f/4.5-5.6 G OSS is the direct native rival — it has built-in stabilisation but typically costs more and scores lower in resolution tests. The Tamron 50-300mm f/4.5-6.3 Di III RXD is a newer sibling with a wider starting focal length, worth considering if you want more versatility. For pure reach on APS-C, the Sony 70-350mm f/4.5-6.3 G OSS is another name that comes up regularly in comparisons.

Who is the Tamron 70-300mm f/4.5-6.3 Di III RXD for?

This lens fits neatly into a few specific shooter profiles:

• Wildlife photographers who want to travel light — 545g is genuinely carry-all-day territory for a 300mm full-frame lens, and the RXD motor keeps up with moving subjects.
• Sports shooters on a budget who need reach and reliable AF without carrying a heavy prime or paying for a top-tier zoom.
• APS-C users pairing this with a Sony Alpha 6700 or similar body — the 450mm equivalent reach makes it a capable birding setup at a fraction of the cost of dedicated super-telephoto glass.
• Travel photographers covering landscapes, distant architecture, and candid portraits where a compact telephoto is more practical than a bulky professional zoom.
• New mirrorless converts building out a Sony FE kit who need a telephoto option that doesn't break the bank but still delivers sharp images.

It's less suited to low-light indoor sports (the f/6.3 maximum aperture at 300mm means you'll need higher ISO), and professional wildlife photographers who need f/4 or faster throughout will want to look at heavier, pricier options. But for a broad range of outdoor shooting scenarios, this lens does a lot right.

Buying a used Tamron 70-300mm f/4.5-6.3 Di III RXD

Picking up a second-hand Tamron 70-300mm Di III RXD is a smart move — these lenses were built for regular use and hold up well, but there are a few things worth checking before you buy.

What to inspect:

• Zoom ring smoothness: Run the zoom through its full range. It should move freely without stiff spots or grinding. This lens sees a lot of extension at 300mm, so zoom creep or resistance is a red flag.
• Front element: Check for scratches or fungus, especially around the edges. Minor dust inside is cosmetically unpleasant but rarely affects sharpness; fungus is a deal-breaker.
• AF operation: Mount it on a Sony body and run autofocus across the focal range. The RXD motor should be near-silent — any clicking or hunting suggests wear.
• Filter thread: The 67mm thread at the front is easy to damage if the lens has been dropped. Make sure it's clean and undamaged.
• No image stabilisation: There's nothing to test on this front, but confirm the lens communicates correctly with the body's IBIS — a quick check in the camera's IS info screen is enough.

Every pre-owned lens at Tamron listings on Camera-tweedehands.nl is individually photographed and professionally inspected. All items come with a minimum 12 months warranty — the exact period is shown on the variant listing — and a 14-day return window, so you can test the lens properly on your own gear without risk.