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Sony FE 1.4x Teleconverter vs Viltrox

Updated July 2026 — Sony FE 1.4x Teleconverter wins on build and optics, Viltrox wins on weight and compatibility.

The Sony FE 1.4x Teleconverter excels in optical performance and build quality, while the Viltrox 25mm F1.7 E offers great value and portability.

Why Sony FE 1.4x Teleconverter is better

Optical Quality

Maintains full G Master performance.

Build Quality

Dust and moisture resistant design.

Autofocus

Retains autofocus performance of attached lens.

Why Viltrox is better

Price

Significantly cheaper at $176.

Weight

Lightweight design at 170g.

Versatility

Compatible with a wider range of cameras.

Overall score

Sony FE 1.4x Teleconverter
85
Viltrox
70

Specifications

SpecSony FE 1.4x TeleconverterViltrox
Max ApertureN/Af/1.7
Focal Length1.4x25mm
WeightN/A170g
Dust ResistanceYesNo
Autofocus TypeLens dependentSTM

Dimension comparison

Sony FE 1.4x TeleconverterViltrox

Overview of the Products

In this comparison, we have the Sony FE 1.4x Teleconverter priced at $598.00 and the Viltrox 25mm F1.7 E lens available for $176.00. The price difference is significant, with the Viltrox being approximately 70% cheaper than the Sony teleconverter. While both products cater to photographers, they serve vastly different purposes and are designed for unique needs within the realm of camera lenses.

Purpose and Functionality

The Sony FE 1.4x Teleconverter is specifically designed to extend the focal length of compatible lenses by 1.4x, making it ideal for sports and wildlife photography where distance is often a factor. It retains full optical quality and autofocus performance, allowing users to maintain image integrity even at longer distances. On the other hand, the Viltrox 25mm F1.7 E is a prime lens that excels in low-light conditions with its bright f/1.7 maximum aperture. This lens is suited for everyday photography, providing versatility for both stills and video.

Build Quality and Design

In terms of build quality, the Sony FE 1.4x Teleconverter boasts a dust and moisture-resistant design, ensuring reliability during outdoor shoots. This rugged build is particularly beneficial for photographers working in challenging environments. Conversely, the Viltrox 25mm F1.7 E weighs only 170g, making it extremely portable and a great option for travel. While the Viltrox may not have the same level of environmental protection, its lightweight design makes it more convenient for photographers on the go.

Optical Performance

Optical performance is a crucial aspect for any lens. The Sony FE 1.4x Teleconverter is engineered to maintain full G Master performance with impressive optical quality, which is essential for professional-grade photography. It uses an aspherical lens element to minimize distortion. In contrast, while the Viltrox 25mm F1.7 E is designed for sharpness and clarity, its performance in extreme conditions or at longer focal lengths may not match the professional standards set by the Sony teleconverter. Each lens has its strengths, depending on the shooting scenario.

Autofocus Capabilities

The autofocus system is another significant consideration. The Sony FE 1.4x Teleconverter allows photographers to benefit from the autofocus performance of the attached lens, which is crucial for capturing fast-moving subjects. The Viltrox 25mm F1.7 E features an STM stepper motor that provides quiet autofocus, enhancing the shooting experience for both photo and video. While the autofocus capabilities of both products are designed for different uses, the Viltrox’s focus on a quiet operation makes it suitable for videographers and those shooting in quiet settings.

Compatibility

Compatibility is essential to consider when investing in camera lenses. The Sony FE 1.4x Teleconverter is specifically compatible with select Sony E-mount lenses such as the SEL70200GM and SEL100400GM, which limits its use to those who own these specific lenses. In contrast, the Viltrox 25mm F1.7 E is designed for a wider range of Sony E-mount cameras, including popular models like the ZV-E10 II and a6700, making it a more versatile option for a broader audience.

Price and Value

When it comes to pricing, the Sony FE 1.4x Teleconverter is listed at $598.00, whereas the Viltrox 25mm F1.7 E is priced at $176.00. This price difference of $422.00 highlights a significant gap in financial investment, making the Viltrox a more accessible option for those who may be budget-conscious. Despite the lower price, the Viltrox does not compromise on essential features, offering a great value for photographers looking for a capable prime lens.

Which should you buy?

The choice between the Sony FE 1.4x Teleconverter and the Viltrox 25mm F1.7 E ultimately depends on your specific photographic needs. If you require a tool to extend your focal length for wildlife or sports photography, the Sony teleconverter is unparalleled in maintaining image quality and autofocus performance. However, if you are looking for a versatile, lightweight lens for everyday photography or videography, the Viltrox is a fantastic and budget-friendly option. Consider your shooting style, the types of subjects you usually capture, and your budget to make the best decision for your photography needs.