vsversusfinder

SIGMA 18- vs TTArtisan 7.

Updated July 2026 — SIGMA 18- leads on weight and length.

The SIGMA lens offers superior versatility and image quality, while the TTArtisan lens is a budget-friendly option with unique creative capabilities.

Why SIGMA 18- is better

Image Quality

SIGMA lens delivers sharper images.

Versatility

Wide focal range of 18-50mm.

Build Quality

Rubber-sealed for weather resistance.

Why TTArtisan 7. is better

Price

TTArtisan is significantly cheaper.

Creative Effects

Unique fisheye perspective.

Low-Light Performance

Wider f/2.0 aperture.

Overall score

SIGMA 18-
85
TTArtisan 7.
70

Specifications

SpecSIGMA 18-TTArtisan 7.
BrandSigmaTTARTISAN
Price$599.99$139.00
CompatibilityCanon RFSony APS-C
Max Magnification1:2.8N/A
Weather SealedYesNo

Dimension comparison

SIGMA 18-TTArtisan 7.

Overview of the Sigma 18-50mm F2.8 DC DN Contemporary Lens

The SIGMA 18-50mm F2.8 DC DN Contemporary Lens is designed specifically for Canon RF mount mirrorless cameras, offering high performance and versatility for photographers. With a current price of $599.99, this lens is positioned as a premium option for users seeking quality in their photography. The lightweight and compact design, weighing just 300g, makes it an excellent choice for travel and everyday use. Its rubber-sealed mount ensures durability in various environments, allowing photographers to capture images in diverse conditions.

Overview of the TTArtisan 7.5mm F2.0 Fisheye Lens

In contrast, the TTArtisan 7.5mm F2.0 for Sony is priced at $139.00, making it significantly more budget-friendly—about 77% cheaper than the Sigma lens. This fisheye lens offers a unique 180° wide-angle perspective, perfect for creative photography, including astrophotography and architectural shots. The lens features a wider f/2.0 aperture that allows for better low-light performance compared to typical fisheye lenses, providing clarity in challenging lighting conditions. Weighing in at a compact size, it is suitable for both casual and serious photographers looking to explore new angles and visual effects.

Image Quality Comparison

When it comes to image quality, the SIGMA 18-50mm F2.8 DC DN lens excels in delivering sharp, high-resolution images, particularly given its versatile zoom range. The f/2.8 aperture offers a good balance of light capture and depth of field control, making it suitable for various shooting scenarios. On the other hand, the TTArtisan 7.5mm F2.0, while producing distinct fisheye effects, might not match the overall sharpness across its field of view as the Sigma lens. The wider f/2.0 aperture does help in low-light situations, but the unique distortion of the fisheye could detract from the image quality in traditional photography.

Versatility of Use

The SIGMA lens is highly versatile, with a focal length range of 18-50mm that covers a wide array of photography styles, from landscapes to portraits. Its minimum focusing distance of 12.1cm allows for close-up shots, making it adaptable for various creative expressions. In contrast, the TTArtisan lens, while specialized for fisheye photography, is more limited in application. Its extreme 180° angle of view is fantastic for specific genres like astrophotography or creative portraiture, but less practical for general use. The 4-inch minimum focusing distance of the TTArtisan adds some unique close-up capabilities, yet it may not be suitable for traditional photography needs.

Build Quality and Design

The build quality of the SIGMA 18-50mm lens is noteworthy, featuring a rubber-sealed mount that provides protection against dust and moisture—ideal for outdoor shooters. Its compact design with a maximum diameter of 69.2mm and a length of 74.5mm makes it a lightweight addition to any camera kit. The TTArtisan 7.5mm lens, while also compact, does not emphasize weather resistance, which could be a concern for photographers working in varied conditions. However, the unique design element of the TTArtisan lens, which includes a specially designed lens cap that creates a miniature planet effect, adds a creative flair not found in the SIGMA lens.

Price and Value Proposition

With a price difference of $460.99, the TTArtisan lens is significantly more affordable than the SIGMA lens, making it an attractive option for budget-conscious photographers. For those looking for a fisheye effect without breaking the bank, the TTArtisan offers excellent value. However, the SIGMA lens justifies its higher price with superior versatility and better overall image quality, making it a worthwhile investment for serious photographers who seek performance and reliability in various shooting conditions.

User Experience and Compatibility

The SIGMA lens is designed for Canon RF mount mirrorless cameras, ensuring a seamless experience for users of compatible models. Its lightweight and compact design makes it user-friendly, allowing for extended shooting sessions without fatigue. In contrast, the TTArtisan lens is compatible with a wide range of Sony APS-C models, providing extensive options for users in the Sony ecosystem. This compatibility makes the TTArtisan a versatile choice for Sony users looking to explore creative photography styles.

Which should you buy?

Choosing between the SIGMA 18-50mm F2.8 DC DN Contemporary Lens and the TTArtisan 7.5mm F2.0 Fisheye lens depends on your photography needs and budget. If you prioritize versatility, image quality, and build reliability, the SIGMA lens is the superior option despite its higher price tag. However, if you are looking for a budget-friendly lens that offers unique creative capabilities, particularly for fisheye photography, the TTArtisan lens stands out as a compelling choice. Ultimately, each lens serves different purposes, so consider your photographic goals when making your decision.