Released August 2021

The world's first telephoto zoom lens with an F1.7 aperture across the entire zoom range. Mount: Micro Four Thirds mount. Focal length: 25-50mm (35mm equivalent: 50-100mm). Aperture: F1.7. Filter diameter: 77mm. Dustproof and weatherproof. [HX2550] HX2550 Released August 2021
The world's first* telephoto zoom lens with an F1.7 aperture across the entire zoom range. Meeting Leica's strict optical standards, this lens delivers the brightness and superior imaging performance of the large F1.7 "SUMMILUX" aperture across the entire zoom range, a world first*. The shallow depth of field of F1.7 allows for dramatic bokeh effects and minimizes camera shake in low-light situations. The lens construction, consisting of 16 elements in 11 groups, includes one aspherical lens, three ED lens elements, and one UHR lens element, optimally positioned to achieve a brightness of F1.7 throughout the entire zoom range and high resolution equivalent to that of a prime lens. The bright F-number delivers excellent imaging performance in a variety of scenes, from portraits to snapshots, and delivers impressive bokeh effects in both still and video. *As a telephoto zoom lens for interchangeable lens digital cameras. Scheduled for release on August 26, 2021. Covers the focal lengths of four prime lenses, from standard 50mm to telephoto 100mm. Covering the focal lengths of four prime lenses*, this single lens covers the 50mm-100mm range, allowing for efficient shooting without the need for multiple prime lenses. It's also ideal as a portrait zoom lens, combining high resolution in the focal plane with beautiful, almost melting bokeh in the background. *Four typical focal lengths: standard 50mm, standard/medium telephoto 75mm, medium telephoto 85mm, and telephoto 100mm.
Despite being a large-aperture telephoto zoom lens, it offers excellent operability and mobility. Despite being a large-aperture telephoto zoom lens, it weighs just 654g and is compact, measuring just 127.6mm in total length (maximum diameter 87.6mm). Its mobility makes it ideal for a variety of shooting situations, enabling stable handheld shooting.
High-speed, high-precision AF for high-quality image capture. This lens's focus is driven by a linear motor along a guide axis, which holds the focus lens. This configuration combines high-speed, high-precision AF performance with quiet AF operation. For still image shooting, it supports high-speed, high-precision contrast AF at 240fps, ensuring precise focus tracking of fast-moving subjects. During video recording, the inner focus system and linear motor ensure quiet operation, while the quiet drive allows for quiet shooting without worrying about focus drive noise, shortening post-production time.
Lens performance enables high-resolution video recording. The latest optical design thoroughly suppresses focusing breathing, which is the change in angle of view that occurs when focusing. Even in scenes with large changes in brightness, aperture micro-step control smoothly controls f-stop changes, preventing sudden changes in exposure. High-speed zoom tracking control prevents subject shifts during zooming, allowing for zoom operation similar to that of a parfocal lens. In addition, the focus ring can be switched between linear and non-linear settings on the camera body.* The non-linear system shifts the focus by a variable amount in response to the rotation speed of the focus ring, allowing for agile focusing. The linear system shifts the focus by a fixed amount in response to the rotation of the focus ring, and the rotation amount can also be adjusted to suit the shooting scene. This allows for intuitive and precise focusing similar to that of a mechanical lens, tailored to the photographer's intent when shooting video. *G Series cameras released after the DC-GH5M2.
Aperture Ring for Intuitive Operation: The lens barrel is equipped with an aperture ring. You can intuitively change the aperture value by operating the ring, even while looking through the viewfinder. Furthermore, the clickless aperture ring provides stable and smooth exposure control during video shooting, allowing you to precisely control the depth of field.
Focus Clutch for Quick AF/MF Switching: The focus clutch mechanism allows you to quickly switch between AF and MF by simply sliding the focus ring. Sliding the focus ring reveals a distance indicator, allowing you to manually focus while keeping an eye on the distance.
The dust- and splash-proof design* protects the lens from harsh environments, allowing you to take it on professional photography in a wide range of fields. Capture those rare, unexpected shutter opportunities regardless of the weather, protecting your precious lens from water droplets and dust. *When attached to a Panasonic dust- and splash-proof camera body. Although the camera is designed to be dustproof and weather-resistant, it cannot completely prevent dust and water droplets from entering.
Low-temperature resistant design down to -10°C The camera is designed to withstand temperatures as low as -10°C, allowing you to shoot in cold locations such as snowy mountains and slopes. You can capture the beautiful and fantastical world of snow and ice as new works of art. Accessories: Lens hood, lens cap, lens rear cap, lens pouch ■ Specifications ■ Lens construction: 16 elements in 11 groups (1 aspherical lens, 3 ED lenses, 1 UHR lens) Mount: Micro Four Thirds standard compliant Angle of view: W (f=25mm): 47° - T (f=50mm): 24° Focal length: 25-50mm (35mm equivalent: 50-100mm) Maximum aperture/minimum aperture: F1.7/F16 Aperture type: 9-blade circular iris diaphragm Focusing distance range: 0.28m to ∞ (W end) / 0.31m to ∞ (T end) Maximum magnification: 0.21x (35mm equivalent) 0.42x) (T-end) Filter diameter: φ77mm Maximum diameter x length: φ87.6mm x approx. 127.6mm (from the tip of the lens to the lens mount reference plane) Weight: approx. 654g (excluding lens hood, lens cap, and lens rear cap) Manufacturer's warranty period: 1 year