Rokinon vs Sigma 17-

Overview of the Rokinon 14mm f/2.8 and Sigma 17-40mm F1.8

The Rokinon 14mm f/2.8 IF ED Super Lens is priced at $231.25, while the Sigma 17-40mm F1.8 DC comes in significantly higher at $919.00. This price difference of about 297% reflects not only the varying optical designs but also the intended use cases for each lens. The Rokinon is designed primarily for ultra-wide-angle shots, making it ideal for landscapes and astrophotography, while the Sigma offers versatility with a zoom range suitable for portraits, travel, and video work.

Optical Performance

The Rokinon 14mm f/2.8 features a design with 14 elements arranged in 10 groups, which contributes to its exceptional sharpness and clarity. This lens excels in capturing detailed images across the entire frame, particularly at a wide angle of 115.7°. In contrast, the Sigma 17-40mm F1.8 boasts a constant aperture of F1.8, allowing for impressive low-light performance and creative depth effects. Both lenses provide high-quality optics, but the Rokinon's fixed focal length may appeal more to those who prioritize sharpness in wide-angle photography, while the Sigma's versatility makes it suitable for a broader range of photographic styles.

Build Quality and Design

The Rokinon 14mm lens is constructed with a robust design that weighs 31.7oz (900g), ensuring durability for professional use. It also includes a built-in petal-type lens hood, which is beneficial in reducing flare and ghosting effects. The Sigma 17-40mm, while also featuring quality build characteristics, is designed for Sony E-mount APS-C cameras, focusing on a balance between weight and functionality. Both lenses are reliable, but the Rokinon may offer more confidence in harsh shooting conditions due to its sturdy construction.

Focusing Mechanism

The Rokinon 14mm lens utilizes a precision manual focus mechanism that allows photographers to achieve sharpness with great accuracy. This feature is particularly important for astrophotography, where focusing can be critical. On the other hand, the Sigma 17-40mm is designed with autofocus capabilities, catering to those who prefer quicker focus adjustments, especially in dynamic shooting environments like travel and events. The choice between manual and autofocus will largely depend on the photographer's style and needs.

Intended Use Cases

The intended use cases for these lenses are distinctly different. The Rokinon 14mm f/2.8 is ideal for landscapes and astrophotography, making it a favorite among photographers who specialize in wide, expansive shots. Its ultra-wide perspective is particularly advantageous for real estate photography as well. Conversely, the Sigma 17-40mm F1.8 is more versatile due to its zoom capability, making it suitable for a variety of photography styles, including portraits and travel. This difference in intended use highlights how each lens serves its target audience.

Price Comparison

The Rokinon 14mm f/2.8 is priced at $231.25, making it a more budget-friendly option compared to the Sigma 17-40mm F1.8, which is priced at $919.00. This significant price difference of about $687.75 may influence the purchasing decision for many photographers, especially those who are just starting out or those who primarily focus on wide-angle photography and do not require the versatility of a zoom lens. The Rokinon offers an appealing entry point into high-quality wide-angle photography without breaking the bank.

Compatibility and Versatility

The Rokinon 14mm lens is compatible with various mounts, including Canon EF, Nikon F, and Sony E, among others, which broadens its appeal to a wider range of users. The Sigma 17-40mm is specifically designed for Sony E-mount APS-C cameras, limiting its compatibility but ensuring optimized performance for users of this system. If you own a Sony E-mount camera and are looking for a versatile lens, the Sigma may be the better choice, while the Rokinon caters to photographers who may need to switch between different camera systems.

Which should you buy?

In conclusion, the decision between the Rokinon 14mm f/2.8 and the Sigma 17-40mm F1.8 largely depends on your specific photographic needs. If you prioritize ultra-wide-angle shots, particularly for landscapes or astrophotography, the Rokinon offers excellent optical performance at a significantly lower price. However, if you require a versatile zoom lens for various shooting scenarios, the Sigma provides a bright aperture and autofocus capabilities, albeit at a higher investment. Ultimately, both lenses are strong contenders within their respective niches, and your choice should align with your photography style and budget.