AF Objective 28-105mm/2.8 DG DN (A) L-Mount p/ Panasonic / Leica / Sigma - SIGMA

A versatile F2.8 opening, perfect for portraits and low light
With its fast opening over the whole focal range, SIGMA 28-105mm F2.8 DG DN / Art is a true lens of work that can be used for almost all types of photography. Landscape photographers can shoot wide angular landscapes using the F2.8 opening for low light scenes and urban views to twilight, while intermediate focal lengths deal with poorly lit documentaries and street subjects, allowing for filling speeds a more point fast than comparable lenses. At the long end, the popular focal lengths for 85mm and 105mm portraits, combined with the maximum aperture of F2.8, produce a reduced depth of field that will isolate a motif impressively against a large, beautiful bokeh.

Fill the frame with excellent close up performance
Reaching a minimum focus distance of only 40 cm across its zoom range, SIGMA 28-105mm F2.8 DG DN / Art can bring you closer to your reason by filling the frame with details and texture. In its 105mm definition, this creates a very useful maximum magnification ratio of 1:3.1 for powerful macro style results.

Aptical top performance over the full zoom and focus range
SIGMA 28-105mm F2.8 DG DN / Art works without compromises, suppressing aberrations very effectively in each group of lenses and across the zoom and focal range. This makes sure the lens performs consistent, even with such a long zoom range. This is due to the top quality optical design of the lens, which includes two FLD elements, an SLD and five aspheric elements, the first group of which uses a large diameter element f66.4 mm that is extremely difficult to produce and is only available thanks to SIGMA´s advanced manufacturing technology at its only production base in Aizu, Japan.

Conceived to minimize flare and ghosting
It uses an advanced simulation technology, flares and ghosting have been largely eliminated, ensuring that the lens shows high-contrast rich results in all conditions. In addition, the Poroso Nano Coating and SIGMA Super Multi-Lash Coating were applied to further suppress flares and ghosts.

Minimum focus breathing
Vital for videotapes requiring a consistent framework, the lens is designed to keep focusing of focusing to a minimum. This ensures that any change in the view angle due to the focus change are minimized across the entire zoom range, ensuring a natural aspect focus during video recording and an easier image alignment during focus stacking.

Excellent portability thanks to a weight less than 1 kg
Standard zooms should be small and lightweight enough to photograph with the camera in hand all day, so the SIGMA 28-105mm F2.8 DG DN / Art is designed thinking about portability. It combines five aspheric elements effectively placed to shorten the total length and a magnesium alloy construction around the assembly, keeping the weight of the lens by less than 1 kg. This ensures that the lens has a superb portability similar to that of the shorter standard zoom lens while providing a wider zoom range.

Excellent optical performance in a aerodynamic body
By using five aspheric elements in its optical construction, SIGMA was able to significantly reduce the total length of the lens without compromising image sharpness and quality. This advanced configuration was only made possible by continuous technological innovation and cutting-edge manufacturing processes in the only SIGMA production base in Aizu, Japan.

A smarter design means less weight
The constant F2.8 zoom lenses can be weighed, but by optimizing the design and materials for each part of the SIGMA 28-105mm F2.8 DG DN/Art, SIGMA has achieved a remarkably light weight of less than 1kg. The use of magnesium alloy instead of aluminum for the body of the lens around the support reduced the weight of these parts by two-thirds, simultaneously assuring their stiffness.

Professional Characteristics, Fast AF, and Excellent Building Quality
In addition to the high-speed AF provided by its linear HLA (High-response Linear Actuator) motor, SIGMA 28-105mm F2.8 DG DN / Art includes a series of characteristics that help get the best possible results in all situations photographics. These include a dust-resistant structure and splash and a repellent water and oil coating, as well as a zoom locking switch, an opening ring that can be removed with a click, buttons
AFL and the focus ring for easier handling, including shooting with MF

A HLA linear motor for a fast and accurate AF
The lens incorporates an HLA linear motor (High-response Linear Actuator) that provides a maximum drive speed, assuring a reactive, accurate and smooth AF. With its high level of silence, the engine also provides noise-free video capability.

An opening ring for better ergonomic
For rapid changes to the exposure, or for a more traditional way to photograph, the lens is equipped with a dedicated opening ring, allowing the user to change the opening through the lens if they prefer. An opening ring click interrutor is a useful tool for film directors and a locking switch helps to ensure that the opening ring is not accidentally removed from its definition.

Two AFL buttons for higher customization
Located on the side and upper body, two customizable AFL buttons can be easily achieved in the horizontal or vertical firing positions, securing more ergonomic handling.
Zoom lock switch to keep the zoom ring safe.
The lens is equipped with a zoom-blocking switch that keeps the zoom mechanism in place at its wide end, preventing it from stretching unwittingly under its own weight when transported. Lock can be released through the switch or turning the zoom ring for a faster and more flexible workflow.

Weather-resistant structure for difficult conditions
The lens has a dust-resistant structure and splashes that keeps it free from contaminants in adverse outer environments. The front element also has a repellent water and oil coating that helps keep it clean in adverse pickup conditions.

Features
The values below refer to the L-mount version.
Construction of lens: 18 elements in 13 groups (2 FLD, 1 SLD, 5 aspheric elements)
Vision Angle: 75.4-23.3°
Number of diaphragm blades: 12 (rounded diaphragm)
Minimum Opening: F22
Minimum focus distance: 40cm
Maximum magnification ratio: 1:3.1 to f=105mm
Filter size: f82mm
Maximum diameter x length: f87.8mm x 157.9mm
Weight: 995g