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

The Tamron 70-300mm f/4.5-6.3 Di III RXD is a tiny, affordable telephoto zoom for Nikon Z cameras that punches above its price in sharpness and portability. It's missing stabilization and struggles when light gets dim, but at around $400 it's one of the best budget ways to hit 300mm. Hikers, travelers, and anyone who hates heavy glass should take note.

In our database, this Tamron lands in the 70th percentile for optical quality, which translates to 'good, not great' in the real world. On a 24MP or 45MP Nikon Z body, you'll see crisp detail from the center out to the edges at 70mm, even wide open. Stop down to f/8 and things get impressively consistent. At 300mm, you'll notice a slight drop in contrast and corner sharpness, but it's still perfectly usable for social media or decent-sized prints. Chromatic aberration is well controlled for a lens at this price point, so you won't spend forever cleaning up purple fringing.

Autofocus performance is a middle-of-the-pack story. The RXD motor is great for static subjects and casual video work, locking on with barely a whisper. But when we tracked birds in flight or kids running around, it occasionally hunted. This isn't a sports monster. The bigger headache is the lack of optical stabilization. If your Z body has IBIS (like the Z6 II or Z8), you'll manage handholding at 1/125s or so at 300mm. Without it, you'll need bright light or steady hands to avoid blur. The slow maximum aperture (f/4.5-6.3) compounds this, making indoor or twilight shooting a real challenge without cranking ISO.

Stacked against the Nikon Z 24-200mm f/4-6.3 VR, the Tamron gives you an extra 100mm of reach, less weight, and a much slimmer price tag. The trade-off is you lose the 24mm wide end and in-lens VR, making the Z 24-200 a better all-day walkaround lens if you don't mind the higher cost. For those considering their F-mount options, the AF-P Nikkor 70-300mm f/4.5-5.6E ED VR is a solid alternative when adapted via FTZ. It offers stabilization and a slightly brighter long end (f/5.6 vs f/6.3), but adds bulk and requires the adapter, which eats into the convenience factor. If you can stretch your budget significantly, the Nikon Z 100-400mm f/4.5-5.6 VR S is in another league for speed, sharpness, and stabilization, but it's also five times the price and heftier by a mile. For budget telephoto on Z, Tamron has carved out a unique spot.

Pricing here is weird. Our data pulls in vendors listing this lens from $399 all the way up to a head-scratching $3,889, which is either a bundle we don't understand or a seller testing the limits of human optimism. Stick to reputable stores like Best Buy or Amazon (sold by Amazon) and you'll find it for around $400. At that number, it's an absurdly good deal for Nikon Z users who want native-mount telephoto without the mortgage payment. For context, Nikon's own Z 70-200mm f/2.8 VR S runs $2,600 and weighs nearly three times as much. The Z 24-200mm f/4-6.3 VR gives you stabilization and a wider range for about $800, but costs double and tops out at 200mm. If dollars and grams matter more than speed or bokeh, the Tamron is the clear value champ.

If you're a Nikon Z shooter looking to stretch your reach without draining your bank account, the Tamron 70-300mm f/4.5-6.3 Di III RXD is one of the most tempting options on the market. At just 545g (1.2 lbs) and barely longer than a soda can, it's a telephoto zoom you'll actually want to carry. It covers the popular 70-300mm range on full-frame Z bodies, giving you everything from tight portraits to distant wildlife, all while staying under $400 from many retailers. For hikers, travelers, or anyone who's ever groaned at the weight of a pro zoom, this lens is a breath of fresh air.

Tamron didn't cram every bell and whistle in here, and that's kind of the point. The RXD stepping motor delivers quick, near-silent autofocus that's plenty snappy for everyday stills, though it's not going to keep up with a cheetah at full sprint. The lens is weather-sealed against dust and moisture, so you won't have to panic if a drizzle rolls in. And the 67mm filter thread is a common size, which makes sharing polarizers or ND filters across your kit easy and cheap.

Optically, it leans on a 15-element design with one ED element and Tamron's BBAR coating to fight ghosts and flares. Sharpness is solid in the center, especially in the 70-200mm range, though corners soften a bit at 300mm wide open. The variable aperture (f/4.5-6.3) means you'll be reaching for higher ISOs as the sun dips, and bokeh won't make anyone's jaw drop thanks to the 7-blade diaphragm and slow aperture. But for the price and portability, it's a hard package to beat.

Pass on this if you frequently shoot in dim venues, need creamy background blur, or rely on burst shooting for fast action. The lack of stabilization and slow aperture will frustrate indoor sports and concert photographers, and the bokeh won't win any portrait awards. For nicer subject isolation, consider the Viltrox AF 56mm f/1.7 for APS-C Z cameras or save up for the Nikon Z 70-200mm f/2.8. If video handheld on a non-IBIS body is your main gig, the Nikon Z 24-200mm VR is a safer bet despite the shorter reach.

For Nikon Z owners who prioritize portability and price above all else, this Tamron is an easy recommendation. It's the kind of lens you throw in your bag for a hike or a weekend trip and actually use, because it doesn't feel like a workout. In good light, you'll pull in detailed shots of distant subjects and tight portraits alike. The lack of stabilization and slow aperture are real limitations, but if you shoot mainly in daylight or pair it with a stabilized body, they're manageable.

If you're a dedicated wildlife or low-light shooter, you'll probably outgrow this lens and start eyeing the pricier Nikkor zooms. But for the rest of us, the Tamron 70-300mm f/4.5-6.3 is a no-brainer way to add serious reach to a Z kit without crying into your wallet.