Unique Sigma 28-45mm f/1.8 DG DN Lens
Sigma has once again set the benchmark in the realm of photography with the introduction of the Sigma 28-45mm f/1.8 DG DN Art lens. Celebrated as the world’s first full-frame zoom lens featuring a constant maximum aperture of f/1.8, this lens represents a significant breakthrough in optical engineering.
Meticulously crafted to cater to the needs of both photographers and videographers, the Sigma 28-45mm f/1.8 DG DN Art is designed to deliver unparalleled performance in a portable and versatile package.
Revolution in Full-Frame Zoom Lenses
Below, we delve into the features, technical specifications, and practical use cases that make this lens a must-have for professionals and enthusiasts alike.
Technical Specifications
| Feature | Specification |
|---|---|
| Lens Construction | 18 elements in 15 groups (5 SLD, 3 aspherical elements) |
| Angle of View | 75.4° to 51.3° |
| Number of Diaphragm Blades | 11 (rounded diaphragm) |
| Minimum Aperture | F16 |
| Minimum Focusing Distance | 30cm / 11.9in. |
| Maximum Magnification Ratio | 1:4 at f=45mm |
| Filter Size | φ82mm |
| Dimensions (Diameter × Length) | L-Mount: φ87.8mm x 151.4mm / φ3.5in. x 6.0in. Sony E-mount: φ87.8mm x 153.4mm / φ3.5in. x 6.0in. |
| Weight | L-Mount: 960g / 33.9oz. Sony E-mount: 950g / 33.5oz. |
| Edition Number | A024 |
Innovative Inner Zoom Mechanism
Priced at $1,349 the lens features an inner zoom mechanism that maintains a constant length, enhancing stability and ease of use for hand-held or tripod-mounted shooting. This design also offers better protection against dust and water, ensuring durability in challenging environments.
Lightweight and Robust Design
Weighing less than 1kg, the Sigma 28-45mm f/1.8 DG DN Art combines advanced features with portability. Its durable construction ensures rigidity without adding bulk, and the versatile φ82mm filter size enhances practicality.
Sigma 28-45mm Close-Up Art
With a minimum focusing distance of 30cm throughout the zoom range and a 1:4 maximum magnification ratio, the Sigma 28-45mm f/1.8 excels in close-up photography. It delivers sharp, detailed images, making it perfect for capturing intricate subjects in confined spaces.
Prime-Like Optical Performance
Sigma's meticulous correction of optical aberrations ensures the 28-45mm f/1.8 rivals prime lenses in clarity and definition. Advanced coatings minimize flare and ghosting, providing clear, high-contrast images even in challenging lighting conditions.
Advanced Aberration Correction
The lens uses 5 Special Low Dispersion (SLD) elements and 3 aspherical elements to correct aberrations, particularly axial chromatic aberration. This results in sharp, high-quality images with minimal coloration and smooth, beautiful bokeh.
Curious about the image quality of Sigma products? Dive into my YouTube channel, click the link for a showcase of sample shots.
Other Features
- Professional-Grade Autofocus
- Smooth and Precise Manual Focus
- Suppressed Focus Breathing
- Flare and Ghosting Resistance
- Aperture Control and Durability
Accessories in the Box
- Case
- Lens Hood LH878-06
- Front Cap LCF-82 III
- Rear Cap LCR II
Practical Use Cases
- Event Photography
The wide aperture and versatile zoom range make this lens ideal for capturing candid moments in low-light environments such as weddings, concerts, and parties.
- Videography
With high-speed AF, minimal focus breathing, and a near-silent motor, the lens is perfect for video recording, providing smooth and natural focus transitions.
- Travel and Street Photography
The compact and lightweight design ensures that photographers can carry the lens comfortably for extended periods, capturing dynamic scenes and spontaneous moments with ease.
- Portrait Photography
The ability to achieve beautiful bokeh and a shallow depth of field makes this lens perfect for creating striking portraits with a professional look.
- Macro and Close-Up Photography
The consistent close focus capability allows photographers to capture detailed close-up shots without sacrificing sharpness or image quality.
FAQ about Lens
Q1: What makes the Sigma Art 28-45mm f/1.8 DG DN unique?
A: This lens is the world's first full-frame zoom lens with a maximum aperture of f/1.8, offering the flexibility of a zoom with the performance typically reserved for prime lenses.
Q2: Is the lens suitable for video recording?
A: Yes, the lens features high-speed AF, minimal focus breathing, and a near-silent motor, making it ideal for video recording.
Q3: How does the inner zoom mechanism benefit photographers?
A: The inner zoom mechanism ensures that the lens length remains constant, enhancing stability and ease of use during handheld shooting and when mounted on a tripod or gimbal.
Q4: What mounts are available for this lens?
Constant f/1.8 Wide to Normal Zoom
Q5: What are the main advantages of the f/1.8 aperture?
A: The f/1.8 aperture allows for excellent low-light performance, stunning bokeh, and a shallow depth of field, providing greater creative control and flexibility.
Q6: Is the lens weather-resistant?
A: Yes, the lens features a dust- and splash-resistant body and a water- and oil-repellent coating on the front element, ensuring durability in various environments.
Q7: Does the lens have built-in image stabilization?
A: No, the lens does not have built-in image stabilization. However, it is designed to be stable and easy to handle, with a constant lens length due to the inner zoom mechanism.
The 28-45mm f/1.8 DG DN Art lens from Sigma represents a significant advancement in lens technology, combining the versatility of a zoom lens with the benefits of a wide maximum aperture. Its superior optical performance, premium build quality, and practical features make it an essential tool for photographers and videographers seeking excellence in their work. Whether you're shooting landscapes, portraits, events, or videos, this lens offers unparalleled performance and creative possibilities.
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