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Sigma 17- vs Sony SEL2470GM2 FE 24-

Updated July 2026 — Sigma 17- wins on weight and length, Sony SEL2470GM2 FE 24- wins on price and focal range.

The Sigma 17-40mm F1.8 DC offers great value for enthusiasts, while the Sony SEL2470GM2 excels in professional settings with superior performance.

Why Sigma 17- is better

Price

Sigma is significantly cheaper at $919 compared to Sony's $2448.

Aperture

Sigma has a brighter F1.8 aperture for low-light performance.

Versatility

Sigma's focal range is suitable for both wide-angle and portrait photography.

Why Sony SEL2470GM2 FE 24- is better

Autofocus

Sony features advanced autofocus technology with XD Linear Motors.

Image Quality

Sony provides superior sharpness and clarity with advanced lens design.

Build Quality

Sony is lighter and more compact, enhancing portability for professionals.

Overall score

Sigma 17-
75
Sony SEL2470GM2 FE 24-
90

Specifications

SpecSigma 17-Sony SEL2470GM2 FE 24-
BrandSigmaSony
Max ApertureF1.8F2.8
Weight1.0 lbs1.5 lbs
Focal Length17-40mm24-70mm
AutofocusStandardAdvanced

Dimension comparison

Sigma 17-Sony SEL2470GM2 FE 24-

Overview of the Sigma 17-40mm F1.8 DC

The Sigma 17-40mm F1.8 DC is a versatile zoom lens designed for Sony E-mount APS-C cameras. It features a bright F1.8 constant aperture, making it ideal for low-light conditions and creative depth effects. This lens is priced at $919.00, offering a solid option for photographers looking for quality without breaking the bank.

With its Art-series optics, the Sigma lens delivers sharp detail and professional image quality, making it suitable for various photography styles including portraits, travel, and video. The relatively lower price point compared to its competitor may appeal to enthusiasts and semi-professionals alike.

Overview of the Sony SEL2470GM2 FE 24-70mm f/2.8 GM II

The Sony SEL2470GM2 FE 24-70mm f/2.8 GM II is a premium full-frame lens that boasts exceptional G Master resolution and exquisite bokeh. Retailing at $2,448.00, this lens is positioned towards professionals seeking the best performance in both stills and video.

This lens is engineered with advanced autofocus capabilities and is the lightest lens in its category, weighing just 24.6 oz (695 g). With a constant aperture of f/2.8, it provides excellent contrast and sharpness across all zoom and aperture settings, embodying the high standards expected from Sony's G Master line.

Image Quality Comparison

In terms of image quality, both lenses offer impressive results, but they cater to different needs. The Sigma 17-40mm F1.8 excels in low-light situations due to its bright F1.8 aperture, allowing for better performance in challenging lighting conditions. This feature can greatly benefit photographers who often shoot indoors or during dusk.

On the other hand, the Sony SEL2470GM2 FE 24-70mm f/2.8 GM II is designed for optimal sharpness and clarity, thanks to its high-precision glass elements and advanced lens design. This lens minimizes aberration and provides superb resolution, making it suitable for professional environments where image fidelity is paramount.

Versatility and Use Cases

The Sigma 17-40mm F1.8 is particularly versatile, with its focal range catering well to both wide-angle and portrait photography. This flexibility, combined with its affordability, makes it an excellent choice for travel and casual shooting scenarios.

Conversely, the Sony SEL2470GM2 FE 24-70mm f/2.8 GM II is a more specialized tool for professional photographers and videographers. Its full-frame capability and constant aperture make it ideal for a wider range of situations, including weddings, events, and commercial work where image quality and performance are critical.

Autofocus Performance

Autofocus speed and accuracy differ significantly between these two lenses. The Sigma 17-40mm F1.8, while competent, does not feature the same advanced autofocus technology as the Sony lens. The Sigma lens is best suited for general photography where speed is important but not the sole focus.

In contrast, the Sony SEL2470GM2 FE 24-70mm f/2.8 GM II utilizes four XD Linear Motors for fast and precise autofocus, making it an excellent choice for capturing fast-moving subjects. This advanced tracking capability allows photographers to shoot at high frame rates, up to 30 frames per second, which is particularly beneficial for sports and wildlife photography.

Build Quality and Design

When it comes to build quality, the Sony lens is designed to be durable and lightweight, weighing just 24.6 oz (695 g) and being 16 mm shorter than its predecessor. This reduction in size and weight enhances portability, particularly for professional use where mobility is crucial.

The Sigma 17-40mm F1.8, while well-built, does not match the advanced engineering of the Sony lens. However, it still provides a robust design suitable for everyday use. Both lenses are crafted to withstand the rigors of photography, but the Sony lens edges out in terms of modern design and advanced engineering.

Price Considerations

Price is a significant factor when comparing these two lenses. The Sigma 17-40mm F1.8 is priced at $919.00, making it about 63% cheaper than the Sony SEL2470GM2 FE 24-70mm f/2.8 GM II, which retails for $2,448.00. This price difference may sway budget-conscious photographers toward the Sigma lens, especially if their needs are met by its features.

However, for professionals who require the best in autofocus performance and image quality, the investment in the Sony lens may be justified. The advanced technology and superior optics often translate to better results in demanding shooting situations.

Which should you buy?

Choosing between the Sigma 17-40mm F1.8 DC and the Sony SEL2470GM2 FE 24-70mm f/2.8 GM II largely depends on your specific needs and budget. If you are a hobbyist or an enthusiast looking for a versatile and affordable lens, the Sigma offers excellent value with its bright aperture and image quality suitable for a range of scenarios.

On the other hand, if you are a professional photographer or videographer who demands the highest image quality, advanced autofocus capabilities, and superior build quality, the Sony lens is worth the investment. Its features cater to serious work in various environments, justifying its higher price point. Ultimately, the choice hinges on your photography style, needs, and budget.