Sigma 17- vs Tamron
Updated July 2026 — Sigma 17- wins on weight and length, Tamron wins on aperture and magnification.
The Sigma 17-40mm F1.8 DC offers superior image quality and versatility, while the Tamron 24mm F/2.8 Di III OSD is a budget-friendly option for casual photographers.
Why Sigma 17- is better
Image Quality
Sigma's Art-series optics deliver sharper images.
Aperture
Constant F1.8 aperture for low-light performance.
Versatility
Zoom lens suitable for various photography styles.
Why Tamron is better
Price
Tamron is significantly cheaper.
Portability
Compact and lightweight design.
Macro Capability
1:2 maximum magnification for close-ups.
Overall score
Specifications
| Spec | Sigma 17- | Tamron |
|---|---|---|
| Price | $919.00 | $199.00 |
| Max Aperture | F1.8 | F2.8 |
| Weight | Unknown | 7.6 oz |
| Focal Length | 17-40mm | 24mm |
| Macro Ratio | N/A | 1:2 |
Dimension comparison
Overview of the Sigma 17-40mm F1.8 DC
The Sigma 17-40mm F1.8 DC is a versatile lens designed for Sony E-mount APS-C cameras. Priced at $919.00, it features a bright F1.8 constant aperture, making it an excellent choice for low-light photography and creative depth effects. The lens is part of Sigma's Art series, which is renowned for delivering sharp detail and professional image quality. This lens is ideal for various photography styles, including portraits, travel, and video work.
Overview of the Tamron 24mm F/2.8 Di III OSD
The Tamron 24mm F/2.8 Di III OSD is a budget-friendly wide-angle lens priced at $199.00. It offers a compact and lightweight design, making it easy to carry for day-long shooting adventures. With a maximum magnification ratio of 1:2, this lens excels at macro-style shots while providing a minimum object distance of just 4.7 inches, allowing for expressive close-ups. The F2.8 aperture creates beautiful bokeh, making it an attractive option for landscape and everyday photography.
Image Quality Comparison
When it comes to image quality, both lenses exhibit strong performance, but they cater to different needs. The Sigma 17-40mm F1.8 DC, with its Art-series optics, is designed to produce sharp details and professional-quality images, especially in low-light conditions thanks to its constant F1.8 aperture. In contrast, the Tamron 24mm F/2.8 Di III OSD focuses on versatility and ease of use, providing good optical performance across the frame but at a lower aperture of F2.8. The Sigma lens may be the better choice for photographers seeking premium image quality, particularly in challenging lighting.
Versatility and Usage
The Sigma 17-40mm F1.8 DC is a zoom lens that offers a focal range designed for various shooting styles, making it suitable for both wide-angle and portrait photography. Its versatility allows photographers to adapt to different situations without needing to change lenses frequently. On the other hand, the Tamron 24mm F/2.8 Di III OSD, with its fixed focal length, is optimized for wide-angle shots and excels in capturing landscapes and urban scenes. It also shines in close-up photography due to its 1:2 maximum magnification ratio. Depending on your shooting style, either lens could be the right choice.
Build Quality and Design
The Sigma 17-40mm F1.8 DC is built to professional standards, providing a robust feel and reliable performance. While detailed dimensions aren't provided, its design is likely to support rigorous use in various conditions. Conversely, the Tamron 24mm F/2.8 Di III OSD boasts a compact design with a length of only 2.5 inches and a weight of 7.6 ounces, making it exceptionally portable. Additionally, it features moisture-resistant construction and a dirt-resistant Fluorine Coating, allowing photographers to use it outdoors with confidence. This makes the Tamron a practical choice for on-the-go shooting.
Price Comparison
The Sigma 17-40mm F1.8 DC is priced at $919.00, while the Tamron 24mm F/2.8 Di III OSD comes in at a much more accessible $199.00. This makes the Tamron about 78% cheaper than the Sigma lens, making it an attractive option for beginner photographers or those on a tighter budget. However, the price difference also reflects the disparity in features and intended usage between the two lenses. The Sigma lens offers advanced capabilities for serious photographers, while the Tamron lens caters to those looking for a solid, budget-friendly option.
Target Audience
The Sigma 17-40mm F1.8 DC is likely to appeal to professional photographers or serious hobbyists who require high-quality images and versatility in their lens options. Its higher price point and advanced features align with the needs of those who frequently work in varying light conditions and need reliable performance. On the other hand, the Tamron 24mm F/2.8 Di III OSD is perfect for casual photographers, travelers, and those who enjoy landscapes and street photography. Its affordability and compact design make it an excellent choice for anyone looking to explore wide-angle photography without breaking the bank.
Which should you buy?
Deciding between the Sigma 17-40mm F1.8 DC and the Tamron 24mm F/2.8 Di III OSD ultimately depends on your photography needs and budget. If you’re a professional or a serious enthusiast looking for exceptional image quality and versatility, the Sigma lens justifies its higher price with its premium features and performance. However, if you are a casual photographer or someone who values portability and affordability, the Tamron lens offers outstanding value at a significantly lower price point. Consider your shooting style and requirements carefully to make the best choice for your photography journey.

