Panasonic LUMIX G 20mm F 1 7 II ASPH Review | 54 Data compared

The Panasonic Lumix G 20mm f/1.7 II ASPH is an affordable, well-built "pancake" lens designed for Micro Four Thirds cameras, offering a moderate wide-angle 40mm equivalent focal length and a fast f/1.7 maximum aperture. Optically, its biggest strength is a stellar, phenomenal sharpness in the center of the frame straight from f/1.7, backed by highly accurate auto-focus and exceptionally well-controlled lateral chromatic aberrations and distortions in finalized JPEG or converted RAW files. The build quality is excellent despite its ultra-compact 2.5cm thickness, and it features a reliable focus-by-wire manual control ring. However, the lens suffers from notable optical flaws when raw files are left uncorrected, including a whopping 5% barrel distortion and pronounced 1.3px chromatic aberrations. It delivers highly disappointing vignetting performance, with significant light falloff at f/1.7 and f/2 that only clears up from f/4 onward. Additionally, the out-of-focus blur or bokeh is merely average; it struggles with rough transition zones and reveals a distracting onion-like substructure within out-of-focus highlights.

The Panasonic Lumix G 20mm f/1.7 II Asph. is a compact prime pancake lens for Micro Four Thirds cameras that delivers a 40mm equivalent focal length and retails around $269. Weighing just 87 grams, this lightweight lens features a mostly metal build and a circular 7-blade diaphragm that produces smooth bokeh and 14-point sun-stars. The review highly praises its excellent sharpness and detailed image quality even when shot wide open at its bright f/1.7 aperture, making it an exceptional, highly portable tool for low-light photography and daily street shooting. However, the lens does suffer from a few notable drawbacks, most notably its slow and audibly loud autofocus system, which makes it a poor choice for video applications. It completely lacks weather-sealing and optical image stabilisation, relying instead on a camera body's built-in stabilisation. Additionally, while distortion is automatically corrected in-camera, Olympus users will experience uncorrected chromatic aberration and purple fringing in high-contrast areas that must be manually fixed in editing software. Ultimately, receiving a 4.5-star rating, it remains a highly recommended "take anywhere" lens if you can look past its...

The Panasonic 20mm f/1.7 II ASPH Lumix G is a highly compact and lightweight pancake lens designed for Micro Four Thirds cameras. Tested on a Panasonic GX7, it delivers exceptionally high sharpness in the center of the image, low chromatic aberration, and automated in-camera corrections for distortion. Featuring a fast f/1.7 maximum aperture, the lens produces a pleasing background bokeh and provides strong low-light performance, making it an excellent, unobtrusive choice for street photography, weddings, and travel. This updated version features a more sophisticated aesthetic with a solid black metal body, while boasting slightly improved resistance against flare under extreme testing conditions. Despite its strong optical capabilities, the lens does have a few drawbacks, most notably visible vignetting when shooting wide open at f/1.7, though this can be easily corrected with post-processing software. Due to its incredibly compact dimensions, it lacks built-in optical image stabilization, relying instead on compatible camera bodies to compensate for camera shake. Additionally, the "drive-by-wire" manual focusing ring spins indefinitely without mechanical resistance, which requires some adaptation from the user. Finally, while the autofocus remains accurate...

The Panasonic Lumix G 20mm f/1.7 II ASPH updates the original pancake lens with improved build quality, featuring a more premium metal design, color options to match modern bodies, and slightly enhanced flare resistance. It retains the same optical layout and excellent sharpness, offering good value and an ultra-compact, lightweight design for daily photography. However, the review highlights that the version II offers no improvement in autofocus speed compared to the original, and lacks integrated image stabilization. Given the identical optical performance, it is deemed a great option for new users, but not a necessary upgrade for current owners of the first version.

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The Panasonic Lumix G 20mm f/1.7 II ASPH is an exceptionally small, lightweight (87g) pancake lens for the Micro Four Thirds system that delivers stunning, clinically sharp image quality even when shot wide open at its fast f/1.7 aperture. It features a robust, redesigned black metal body and mount, making it a durable choice for a highly portable "one camera, one lens" travel or walk-around setup. The lens produces excellent contrast, natural color rendering, and smooth bokeh transitions, while successfully controlling distortion and resisting lens flare without needing a bulky lens hood. However, the lens suffers from notable performance drawbacks, most significantly its slow, loud autofocus system that struggles with moving subjects and generates an audible hum in video recordings. The manual focus implementation is also a weak point, utilizing a stiff "focus by wire" system with excessive throw and no depth-of-field scale or hard stops. Furthermore, it lacks weather sealing, displays noticeable wide-open purple fringing on Olympus cameras, and introduces severe, unsalvageable banding issues at high-ISO settings over 800 on certain bodies like the E-M10, heavily limiting its capability...

The Panasonic Lumix G 20mm f/1.7 II ASPH. is an ultra-compact pancake prime lens designed for the Micro Four Thirds system, offering a 40mm focal length equivalent in 35mm terms. Scoring 79/100 overall, it stands out for its exceptional sharpness and portability, weighing just 87 grams and measuring a mere 25.5mm in length. Its optical design consists of 7 elements in 5 groups, including two aspherical lenses, and it features a bright f/1.7 maximum aperture coupled with a 7-blade circular diaphragm that produces smooth bokeh background blur. Key advantages of this lens include its strong performance rating (17/100) and its internal focusing system powered by a stepping motor that supports high-speed autofocus tracking.