Panasonic G Leica DG Vario-Summilux 10-25mm f/1.7 Aspherical Review

This is the best zoom lens for Micro Four Thirds, full stop. It's also heavy, expensive, and has no stabilization, so your camera and wallet need to be ready.

The Panasonic 10-25mm f/1.7 is the lens that makes you forget you're shooting Micro Four Thirds. It's big, heavy, and expensive, but the one thing you need to know is this: the image quality is absolutely stunning. This lens delivers sharpness and bokeh that compete with the best primes, all while giving you a useful 20-50mm equivalent zoom range with a constant f/1.7 aperture. If you're willing to carry the weight and pay the price, it might just become the only lens you need.

The optical performance is what surprised us most. Our data puts it in the 92nd percentile for optics, and that's not just a number. From 10mm to 25mm, wide open at f/1.7, this thing is sharp. The bokeh is creamy and beautiful, which is rare for a zoom. The autofocus is reliable for photos, but it does hunt sometimes in video mode, which is a bit disappointing given the lens's video-friendly features. There's no stabilization built in, so you'll need a camera body with IBIS or a gimbal for handheld video work.

Worth it, but only if you're all-in on Micro Four Thirds and demand the best optical performance. At $1,998, this lens costs more than some entire camera systems. You're paying for that Leica branding and that constant f/1.7 aperture. If you need that speed and zoom flexibility, there's nothing else like it for MFT. If you're budget-conscious, look elsewhere.

Compared to the Tamron 17-70mm f/2.8 for Sony APS-C, you're getting a faster aperture (f/1.7 vs f/2.8) but a shorter zoom range and it's only for MFT. The Tamron has stabilization and is lighter. Against the Canon RF 24mm f/1.8 Macro, you lose the zoom and macro capability but gain two extra stops of light and a more versatile focal range. The real competition is your wallet and your back—this lens is an investment in weight and dollars.

If you're looking for a lightweight, affordable walkaround lens, this isn't it. Go get the Panasonic 12-35mm f/2.8 instead. It's smaller, lighter, cheaper, and still very good. Also, skip this if you need macro capabilities—its 0.14x magnification is weak.

We recommend this lens for serious Micro Four Thirds shooters who want prime-like quality in a zoom package. The optical performance is top-tier, the build is solid, and that constant f/1.7 aperture is a game-changer for low light and video. Just be ready for the size, weight, and price. If you can handle those, this lens will not disappoint.