# Panasonic's tiny 20mm lens packs a wide view in a pocket-sized body > The Lumix S 20mm f/2.5 weighs just 5 ounces but delivers a 94-degree field of view, though it struggles with flare and edge sharpness. - Title: Panasonic's tiny 20mm lens packs a wide view in a… - Summary: The Lumix S 20mm f/2.5 weighs just 5 ounces but delivers a 94-degree field of view, though it struggles with flare and edge sharpness. This ultra-compact… - Keywords: panasonic lumix s 20mm f/2.5, panasonic, lumix s9, l-mount, wide-angle lens, prime lens, travel photography, vlogging, street photography, lens review, camera gear, full-frame mirrorless - Source: Digital Camera World — https://digitalcameraworld.com/cameras/lenses/panasonic-lumix-s-20mm-f-2-5-review - Published: 2026-09-16T14:00:00+00:00 - Read time: 3 min - Topics: panasonic lumix s 20mm f/2.5, panasonic, lumix s9, l-mount, wide-angle lens, prime lens, travel photography, vlogging, street photography, lens review, camera gear, full-frame mirrorless ## Tiny lens, huge viewing angle The Panasonic Lumix S 20mm f/2.5 weighs just 142 grams and measures 69x41mm. It delivers a 94.5-degree field of view in an amazingly compact package. ## Built tough despite the weight The lens features dust, splash and freeze resistance with weather seals and a metal mounting plate. The front element has a fluorine coating to repel moisture. ## Perfect match for Lumix S9 Panasonic designed this lens to complement the compact Lumix S9 camera body. It's part of a trio of lightweight lenses that maintain balanced proportions. ## Priced at $499 The lens costs $499 in the US and £429 in the UK. That's more than the 40mm f/2 but less than the 18-40mm zoom from the same series. ## Autofocus is quick and silent A stepping motor drives internal focusing elements, so the front doesn't extend or rotate. It's extremely quiet, making it ideal for video work. ## Gets incredibly close to subjects The minimum focus distance is just 0.18 meters from the sensor. This enables serious close-up potential and makes selfies from arm's length easy. ## Includes physical focus mode switch Unlike many compact lenses, this one has an AF/MF switch on the barrel. You don't need to dig through camera menus to change focus modes. ## Customizable function button included The lens features a programmable button positioned diagonally for easy access. You can assign it to autofocus lock or Panasonic's crop zoom feature. ## Center sharpness is excellent Sharpness in the central region is superb even wide open at f/2.5. The lens delivers impressive clarity and color rendition in the middle of the frame. ## Edge sharpness needs stopping down Sharpness drops off toward edges and corners at f/2.5. You need to stop down to f/8 for good edge sharpness across the entire frame. > Poor wide-aperture edge-sharpness ## Fast enough for low light The f/2.5 aperture pulls in decent light for architectural interiors and night scenes. It's slightly faster than typical f/2.8 zoom lenses. ## Great for vlogging and selfies The wide field of view lets you capture yourself at arm's length while including plenty of background. The vari-angle screen on the S9 helps here. ## Suppresses focus breathing for video The lens is designed to prevent changes in field of view when you adjust focus. This makes it particularly well-suited for videography work. ## Serious ghosting and flare issues The lens is very susceptible to ghosting and flare when shooting against the light. Panasonic doesn't include a hood or sell one separately. > Shooting against the light with no hood mounted on this lens can often give rise to the kind of result shown below. ## Buy an aftermarket hood You can shield the lens with your hand or buy a third-party hood that screws into the 62mm filter thread. This will help control flare problems. ## Versatile for many shooting styles The lens works well for landscapes, cityscapes, architectural interiors, street photography and travel. It's surprisingly versatile for a prime lens. ## Lab tests confirm sharpness pattern Imatest results show superb central sharpness even wide open. However, corner sharpness drops steeply at larger apertures, requiring f/8 for even performance. ## Minimal color fringing detected Chromatic aberration is very well controlled at all apertures and across the whole frame. Fringing won't be visible in general shooting situations. ## Four-star verdict overall The lens earns praise for its compact build and wide perspective. However, edge sharpness issues and flare susceptibility prevent a perfect score. > I'm mostly impressed with the Panasonic Lumix S 20mm f/2.5. ## Consider these alternatives The Sigma 20mm f/2 offers faster aperture and metal build for $769. The Viltrox 28mm f/4.5 pancake costs just $99 but has a fixed aperture. ## Key takeaway This ultra-compact 20mm lens is ideal for travel and vlogging, but you'll need to stop down to f/8 for sharp edges and buy an aftermarket hood to control flare.