Canon EF 75- vs SIGMA 18-
Updated July 2026 — Canon EF 75- wins on price and focal length, SIGMA 18- wins on weight and aperture.
The Canon EF 75-300mm lens is a budget-friendly option for telephoto photography, while the SIGMA 18-50mm lens offers superior performance and versatility.
Why Canon EF 75- is better
Price
Canon lens is significantly cheaper.
Focal Length
Longer zoom range for distant subjects.
Weight
Lighter than many telephoto lenses.
Why SIGMA 18- is better
Aperture
Constant f/2.8 aperture for low light.
Build Quality
Rubber-sealed for weather resistance.
Versatility
Better for a variety of photography styles.
Overall score
Specifications
| Spec | Canon EF 75- | SIGMA 18- |
|---|---|---|
| Max Aperture | f/4-5.6 | f/2.8 |
| Focal Length | 75-300mm | 18-50mm |
| Closest Focus | 1.5m | 12.1cm |
| Elements | 13 elements | 10 elements |
| Weight | 480g | 300g |
Dimension comparison
Overview of the Canon EF 75-300mm f/4-5.6 III Telephoto Zoom Lens
The Canon EF 75-300mm f/4-5.6 III Telephoto Zoom Lens offers a versatile focal length range of 75-300mm, making it ideal for capturing distant subjects with clarity. Priced at $169.00, it is significantly more affordable compared to other lenses on the market. This lens features a construction of 13 elements in 9 groups and a diagonal angle of view that ranges from 32° 11' to 8° 15'. With a closest focusing distance of 1.5 meters, it allows photographers to get relatively close to their subjects, which is a valuable feature for wildlife and sports photography.
Overview of the SIGMA 18-50mm F2.8 DC DN Contemporary Lens
The SIGMA 18-50mm F2.8 DC DN Contemporary Lens offers users a high-performance option for Canon RF mount mirrorless cameras at a price of $599.99. This lens boasts a fast maximum aperture of f/2.8 across its zoom range, providing exceptional low-light performance and depth of field control. Designed to be compact and lightweight, it weighs only 300 grams, making it an excellent choice for photographers who prioritize portability. Additionally, with a minimum focusing distance of 12.1cm and a maximum magnification of 1:2.8, it enables impressive close-up shots, enhancing its versatility for various photography styles.
Performance and Image Quality
When it comes to performance and image quality, the Canon EF 75-300mm lens excels in providing sharp images at longer focal lengths, making it suitable for capturing distant subjects like wildlife or sports. Its telephoto capabilities allow for beautiful background blur, enhancing the subject's prominence in the frame. However, the lens does have a maximum aperture that limits its performance in low-light conditions.
In contrast, the SIGMA 18-50mm lens shines with its constant f/2.8 aperture, delivering superior performance in low light and enabling creative depth of field effects. It is particularly effective for portrait and street photography, where capturing fine details is crucial. The lens's compact size and light weight further enhance its usability, making it a great option for photographers who frequently travel or shoot on the go.
Build Quality and Design
The Canon EF 75-300mm lens is designed with a focus on functionality, featuring a front group rotating extension system with Micromotor for focus adjustment. Its construction is robust, but it lacks advanced weather sealing, which could limit its use in challenging conditions.
On the other hand, the SIGMA 18-50mm lens features a rubber-sealed mount that provides some protection against dust and moisture, making it more suitable for outdoor shooting. Its compact design, with a maximum diameter of 69.2mm and a length of 74.5mm, enhances its portability and ease of use, especially for long shooting sessions.
Price Comparison
The Canon EF 75-300mm lens is priced at $169.00, which is about 72% cheaper than the SIGMA 18-50mm lens, which retails for $599.99. This significant price difference makes the Canon lens an appealing option for budget-conscious photographers or those just starting in photography. However, while the Canon lens offers great value, it does not have the same level of performance and versatility that comes with the SIGMA lens at a higher price point.
Versatility and Use Cases
The versatility of the Canon EF 75-300mm lens makes it a great choice for photographers interested in capturing a wide range of subjects, particularly those that are farther away. Its zoom range allows for flexibility in framing shots without needing to change lenses frequently.
In comparison, the SIGMA 18-50mm lens is particularly well-suited for everyday photography and more intimate settings, such as street photography or portraits. Its ability to focus closely and its fast aperture make it a valuable tool for capturing detailed images in varied lighting conditions.
User Experience and Feedback
User feedback for the Canon EF 75-300mm lens often highlights its value for the price, with many appreciating its sharpness and reach for wildlife photography. However, some users note its limitations in low-light situations and the lack of image stabilization, which can affect handheld shooting.
The SIGMA 18-50mm lens receives praise for its superior image quality, compact design, and versatility. Users often mention the lens's performance in low-light conditions thanks to its f/2.8 aperture, making it a preferred choice for those looking to capture high-quality images in various settings.
Which should you buy?
In conclusion, the choice between the Canon EF 75-300mm f/4-5.6 III Telephoto Zoom Lens and the SIGMA 18-50mm F2.8 DC DN Contemporary Lens largely depends on your photography needs. If you require a budget-friendly telephoto lens for distant subjects, the Canon lens is an excellent option. However, if you seek versatility, superior low-light performance, and a compact design, the SIGMA lens might justify its higher price point. Ultimately, your choice should align with your specific photography goals and how you plan to use the lens.

