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Sony a7 IV vs a7 III

The newer full-frame hybrid or the classic that made full-frame mainstream? Which of Sony's a7 bodies is the smarter buy for you.

By Stephen V.Last updated How we pick

These two full-frame Sony bodies sit at the heart of a lot of buying decisions, and the honest answer to “which one?” is “it depends on what the price difference is when you look.” The a7 IV is the newer, more capable camera; the a7 III is the one that made full-frame mainstream and is frequently discounted. Both share the same excellent low-light sensor size, in-body stabilization and dual card slots.

The real differences come down to resolution, video, screen and menu. The a7 IV brings 33 megapixels, uncropped 4K30 with 4K60 in Super 35, a fully articulating screen and Sony’s modern touch menu. The a7 III sticks with 24 megapixels, 4K30, a tilt-only screen and the older interface. Here is how they line up.

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Sony a7 IVSony a7 III
Sensor resolution33 MP full-frame24.2 MP full-frame
Video4K30 full-width, 4K60 (Super 35)4K30 full-width
Rear screenFully articulating touchscreenTilt-only, limited touch
Stabilization5-axis in-body5-axis in-body
Card slotsDual (CFexpress A / SD)Dual (SD)
Menu systemModern touch menuOlder menu layout
Weight658 g650 g

Both cameras in full

#1The newer hybrid

Sony a7 IV

The default full-frame hybrid for good reason: 33 megapixels is plenty for stills and cropping, autofocus is excellent, and it shoots 4K60 in Super 35. It is more camera than most creators need — but if you are building a paid photo-and-video kit, it is the safe center of it.

Strengths

  • 33 MP full-frame sensor gives real cropping room
  • In-body stabilization and dual card slots
  • Excellent autofocus with reliable eye tracking

Trade-offs

  • 4K60 comes with a Super 35 crop
  • Big step up in price and size from APS-C
SensorFull-frame CMOS, 33 MP
MountSony E
Video4K30 full-width, 4K60 in Super 35
Stabilization5-axis in-body (IBIS)
Weight658 g with battery

Specifications read from the manufacturer listing, on July 18, 2026.

#2The value classic

Sony a7 III

The camera that made full-frame mainstream, and still a smart buy if you find it discounted against the a7 IV. Lower resolution and an older screen, but the same excellent low-light sensor and stabilization — for a lot of shooters the savings are better spent on a lens.

Strengths

  • Superb low-light full-frame sensor
  • In-body stabilization and dual slots at a lower price
  • Battery life that still beats many newer bodies

Trade-offs

  • 24 MP and a lower-res, non-articulating screen
  • Older, single-joystick menu and a dimmer viewfinder
SensorFull-frame CMOS, 24.2 MP
MountSony E
Video4K30 (full-width readout)
Stabilization5-axis in-body (IBIS)
Weight650 g with battery

Specifications read from the manufacturer listing, on July 18, 2026.

Which should you buy?

Buy the a7 IV if you want the most future-proof body: the higher resolution gives you real cropping room, the articulating screen suits video and self-recording, and 4K60 (even cropped) is genuinely useful for slow motion and B-roll. It is the better hybrid for someone building a paid photo-and-video kit, and the modern menu is far nicer to live with.

Buy the a7 III ifyou find it well discounted and mostly shoot stills or straightforward 4K30. The lower resolution is plenty for most work, the low-light performance and stabilization are excellent, and the money you save is better spent on a good lens — which will improve your photos more than the jump between these bodies will. Our portrait lens guide is the place to spend it.

For most people the deciding factor is the price gap on the day. If they’re close, take the a7 IV. If the a7 III is meaningfully cheaper and you don’t need 4K60 or 33 megapixels, it remains a superb camera and the smarter-value buy.

Frequently asked questions

Is the a7 IV worth the extra money over the a7 III?

If the price gap is small, yes — the articulating screen, 33 MP sensor, 4K60 and modern menu are real improvements. If the a7 III is heavily discounted and you shoot mostly stills or 4K30, the savings are better spent on a lens.

Is the a7 III still worth buying?

Absolutely. It shares the same sensor size, in-body stabilization and dual slots, and its low-light performance is still excellent. It's one of the best full-frame value buys when discounted.

Which has better autofocus?

The a7 IV has the newer, stickier autofocus system with better subject tracking, but the a7 III's eye AF is still very good and reliable for portraits and general shooting.

Do they use the same lenses?

Yes — both use the Sony E-mount, so any full-frame FE lens fits both. That makes moving between them, or upgrading later, painless.

Sources

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