Zeiss FE 21mm f2.8 Loxia - 3877
Compact, wide-angle and powerful – these are the properties that make the super wide-angle Loxia 2.8/21 so special. The optical design has been specially developed for high-resolution, full-frame sensors of the mirrorless Sony α series. A system expansion through the new ZEISS Loxia – in a focal length range that has a long tradition at ZEISS.
Despite its compactness, the super wide-angle ZEISS Loxia 2.8/21 offers outstanding image performance – across the entire image field of a full-frame sensor. Whether architecture, landscape or also three-dimensional subjects in close-up against a spacious background – this focal length with its large image angle is an excellent addition to the Loxia lens family. It is an absolute must for wide-angle fans who want to capture even the tiniest details of a special moment in a photo or on film.
ZEISS Loxia lenses were specifically designed for Sony α7 cameras. This means that they can make the most of the mirrorless, full frame system, while giving you all the creative possibilities of ‘classic’ photography with manual focus at the same time.
And that’s not all: ZEISS Loxia lenses also provide everything you need to shoot high quality video, such as the unique DeClick feature for smooth adjustment of the aperture, for example.
Precise manual focus
Manually focusing a lens means controlling the image result from your fingertips. A good ergonomic design makes all the difference. ZEISS lenses stand out with their large rotation angle which enables precise focusing. Changes are immediately visible in the viewfinder. The high-quality focusing mechanism moves smoothly without play, thus also supporting the intuitive interaction with the focal plane. The precise engraving in meter and feet, and the depth of focus scale provide additional support for manually focusing.
DeClick feature
One completely new feature of the Loxia lens is that you can ‘declick’ the aperture’s locking mechanism using a tool (supplied) and an adjustment screw on the bayonet surface. This means that for video applications, you can smoothly eliminate any unwanted differences in brightness as you pan the camera. This feature can also be used with other video systems whose size makes them suitable for adaption.
Virtually distortion-free optics
Dramatic perspectives and a view from extraordinary image angles – ZEISS lenses open up new composition possibilities. Distortion would disrupt the composition because straight lines, whose image does not go through the image center, would be reproduced with a curved shape. This annoying effect is accordingly and largely compensated through elaborate optical designs at all focal lengths.
Hig-grade full-metal casing
Tangible quality that holds its value is what qualifies ZEISS lenses for decades of hard use. A precision-engineered full-metal casing, grippy focus and aperture rings made of metal, and a tough front bayonet and filter screw guarantee stunning photographic results. A special sealing ring on the bayonet also protects the interface between the camera and the lens.
Immensely compatible
The ZEISS Loxia lenses are suitable for use with the mirrorless Sony Alpha cameras with E-mount and were optimized for sensors up to full 35 mm format (24 x 36 mm). With the ZEISS Loxia lenses, the aperture is controlled manually. This allowed the integration of the so-called DeClick feature of the mechanical aperture ring. The cameras feature the corresponding automatic exposure control (A) and manual exposure control (M).
What our Experts Think
Q&A
Q: What is the ZEISS Loxia 21mm f/2.8 (Sony E, 3877)?
A: A premium manual-focus ultra-wide prime lens for Sony E-mount full-frame cameras, designed using ZEISS’s Distagon optical concept for high sharpness, low distortion, and strong contrast in a compact metal body.
Q: What are the key specifications?
A: 21mm focal length, f/2.8–f/22 aperture, full-frame coverage, 11 elements in 9 groups (including aspherical and low-dispersion elements), 52mm filter thread, and ~394g weight.
Q: Does it have autofocus or stabilization?
A: No. It is fully manual focus with a smooth long-throw focus ring and no optical image stabilization, designed for precise control.
Q: What is it best used for?
A: Landscape, architecture, interiors, street, and environmental photography where wide-angle perspective and edge-to-edge clarity matter most.
Q: How is the image quality?
A: Very high sharpness across the frame, strong micro-contrast, minimal chromatic aberration, and excellent color rendering thanks to ZEISS T* coatings and Distagon design.
Q: What makes the Loxia 21mm special?
A: Compact size, all-metal build, weather-sealed mount, and a “pure manual” shooting experience that still communicates with Sony bodies for EXIF and assist features.
Q: Any drawbacks?
A: No autofocus, no stabilization, and noticeable vignetting wide open at f/2.8 that improves when stopped down.
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