Ultra-thin Viltrox pancake prime for Fujifilm X, offering a quirky 42mm equivalent.
The Viltrox AF 28mm f/4.5 is an ultra-thin autofocus pancake lens released in 2024, designed primarily for Fujifilm X-mount mirrorless cameras. At just over 20mm thick it is one of the thinnest interchangeable lenses available, providing a 42mm equivalent field of view that sits between classic 35mm and 50mm perspectives.
Optical quality is surprisingly good for such a thin design. Centre sharpness is excellent from wide open and the lens produces pleasant rendering for casual and street photography. The slow f/4.5 maximum aperture limits low-light capability and bokeh potential. Autofocus is driven by a stepping motor and is reasonably quick.
Available in Fujifilm X, Sony E, and Nikon Z mounts. Filter thread is 40.5mm. The lens competes with other pancake offerings like the Fujifilm XF 27mm f/2.8 but trades aperture speed for an even thinner profile. It is a niche product aimed at photographers who prioritise pocketability above all else.
Very new on the used market with limited availability. Check autofocus responsiveness and the lens mount for any play. The slow aperture makes this a daylight and travel lens primarily. Good value if the ultra-compact form factor is what you need.