Yongnuo YN 12-35mm f/2.8-4M 35mm

The Yongnuo 12-35mm f/2.8-4 delivers near-top-tier sharpness and a fun macro mode at a low price, but its autofocus drifts badly when you zoom. For patient macro shooters who manual focus, it's a quirky bargain. For video or any fast-moving subject, look elsewhere.

Optically, this little lens punches way above its price class. With four aspherical and three ED elements, it delivers crisp images edge-to-edge at f/2.8, putting it in the top tier of our database. The macro switch is a clever trick, letting you lock in 0.5x magnification for near-macro detail, which is a blast for flowers and product shots. But the autofocus is where things get messy. The quiet DSM motor is fine for stills, but as soon as you zoom, the lens tends to drift and hunt, especially in continuous AF. This makes video work a headache, and our video score is its weakest area. Without any stabilization, you'll need a body with IBIS, otherwise low-light handheld shots get shaky fast.

Against MFT stalwarts like the Panasonic Leica 12-35mm f/2.8 II or Olympus 12-40mm f/2.8 Pro, the Yongnuo offers a macro feature they lack but falls apart when you need to track a subject. Those lenses have dependable, near-silent AF and optical stabilization baked in. The Yongnuo can't match that consistency. The Viltrox Air 15mm F1.7 is a different beast entirely, but if you're cross-shopping cheap MFT glass, the Viltrox delivers a faster aperture and better low-light manners, though you lose the zoom range. For video, stick with the Panasonic or Olympus, they're just in another league for reliability.

Pricing is all over the place, ranging from $359 to $496 across vendors. At the low end, it's a tempting deal for a lens with this level of sharpness and a genuine macro mode. But the autofocus woes make it a risky buy. A used Panasonic 12-35mm f/2.8 can sometimes be found for not much more and offers rock-solid performance. If you're set on the Yongnuo, shop around for the best price, some retailers have it listed near $359, which is the sweet spot.

Yongnuo's 12-35mm f/2.8-4 is a curious lens. It packs surprisingly sharp glass and a fun macro trick into a compact, weather-sealed body for Micro Four Thirds cameras. At a price that undercuts the big brands, it seems like a steal. But that sweet deal comes with a catch: the autofocus drifts erratically when you zoom, making it a gamble for anyone who needs consistent focus. For macro shooters who manual focus and want a light travel zoom, it's an interesting option. For everyone else, the inconsistent AF might be a dealbreaker.

The lens feels decent in hand, 318g is nice and light, and the weather-sealed mount is a welcome touch. The electronic zoom keeps the barrel length constant, which is neat for gimbals. But the fly-by-wire zoom ring lacks the direct feel of a mechanical zoom, and the f/2.8-4 aperture range means you'll lose a stop at 35mm.

If you shoot video, need reliable continuous autofocus, or rely on lens stabilization, this isn't your lens. The focus drift when zooming is a real problem, and the lack of optical stabilization makes handheld shooting a chore. Look at the Panasonic 12-35mm f/2.8 II or Olympus 12-40mm f/2.8 Pro instead, they're worth the extra cash for peace of mind.

If you're a macro enthusiast on a budget who's happy to manual focus, and you need a sharp all-purpose zoom for MFT, this lens is a niche find. The optical performance is genuinely impressive, and the macro ability is a bonus. But for anyone who shoots video, needs consistent AF, or just wants a lens that works without fuss, the focus drift is a dealbreaker. You'd be better off saving a bit more for a used name-brand alternative.