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Big Mike's High-Power 420- vs SIGMA 18-

Updated July 2026 — Big Mike's High-Power 420- leads on zoom and weight.

The High-Power lens offers exceptional zoom capabilities at a budget-friendly price, while the SIGMA lens excels in compact design and performance for mirrorless systems.

Why Big Mike's High-Power 420- is better

Price

High-Power lens is significantly cheaper at $139.99.

Zoom Range

Offers up to 1600mm with teleconverter.

Compatibility

Works with a wide range of Canon DSLR models.

Why SIGMA 18- is better

Build Quality

Lightweight and compact design at 300g.

Aperture

Constant f/2.8 aperture for low-light performance.

User Experience

Rubber-sealed for better environmental protection.

Overall score

Big Mike's High-Power 420-
70
SIGMA 18-
85

Specifications

SpecBig Mike's High-Power 420-SIGMA 18-
Price$139.99$599.99
Focal Length420-1600mm18-50mm
CompatibilityCanon DSLRsCanon RF Mount
WeightHeavyLight
Zoom TypeTelephotoStandard
Focus TypeManualAuto

Dimension comparison

Big Mike's High-Power 420-SIGMA 18-

Overview of the Products

The High-Power 420-1600mm f/8.3 HD Manual Telephoto Zoom Lens is priced at $139.99, while the SIGMA 18-50mm F2.8 DC DN Contemporary Lens comes in at $599.99. This significant price difference—about 329% more expensive for the SIGMA lens—highlights their distinct market positioning and intended user base.

The High-Power lens caters to photographers seeking long-range capabilities, ideal for capturing wildlife or sports. In contrast, the SIGMA lens is designed for Canon RF Mount mirrorless cameras, focusing on versatility and performance in a compact design. Each lens serves different photographic needs, making them appealing to different types of users.

Design and Build Quality

The build quality of both lenses reflects their intended use and target audience. The High-Power lens is designed for durability and performance, featuring a robust construction suitable for long-distance shots. However, it is primarily a manual lens, which may require more skill and patience from the user.

On the other hand, the SIGMA lens is noted for being both lightweight and compact, with a maximum diameter of 69.2mm and a length of 74.5mm. This makes it the smallest and lightest lens in its class, weighing only 300g. Additionally, its rubber-sealed mount is designed for use in various environments, providing an extra layer of protection for outdoor photography.

Performance and Image Quality

When it comes to performance and image quality, the High-Power lens excels in offering remarkable zoom capabilities, allowing photographers to reach up to 1600mm with the included 2X Teleconverter. This level of magnification is ideal for capturing distant subjects with intricate detail, making it a favorite for wildlife photographers.

Conversely, the SIGMA lens features a constant aperture of f/2.8, which is beneficial for low-light conditions and achieving a shallow depth of field. Its minimum focusing distance of 12.1cm allows for easy close-up shots, enhancing versatility for various shooting scenarios. The lens is engineered to provide high-quality images at a relatively short focal range, making it suitable for everyday photography and more artistic pursuits.

Compatibility and Use Cases

The High-Power lens is designed to be compatible with a wide range of Canon DSLR models, including the EOS 70D, 80D, 90D, and Rebel series. This extensive compatibility makes it an excellent option for photographers who own multiple Canon cameras and want a lens that can be used across different models.

In contrast, the SIGMA lens is tailored specifically for Canon RF Mount mirrorless cameras. This focus on a single camera type may limit its user base but allows for optimized performance with those specific models. Users looking for a versatile lens for everyday photography, including landscape and portrait work, may find the SIGMA more appealing, especially with its broader focal range and compact design.

Price Comparison

The price difference between these two lenses is notable, with the High-Power lens retailing for $139.99 and the SIGMA lens priced significantly higher at $599.99. This represents a difference of $460, making the SIGMA lens about 4.3 times more expensive than the High-Power lens.

For budget-conscious photographers or those just starting, the High-Power lens offers an attractive option without compromising too much on performance. Meanwhile, professionals or serious enthusiasts may justify the higher cost of the SIGMA lens due to its advanced features and superior build quality.

Target Audience

The High-Power lens primarily targets amateur photographers and enthusiasts who enjoy wildlife and sports photography. Its affordability and long-distance capabilities make it a practical choice for those who want to explore telephoto photography without a hefty investment.

In contrast, the SIGMA lens is aimed at serious photographers who prioritize quality and performance in a more compact form. Its high-performance specifications and compatibility with advanced Canon RF Mount mirrorless cameras cater to professionals seeking versatility in their shooting. This lens is ideal for photographers who need reliability and quality in various environments.

User Experience and Handling

Handling the High-Power lens may require a learning curve due to its manual focus nature, which can be challenging for less experienced users. However, its robust build and exceptional zoom capabilities can reward those who invest the time to master it.

In comparison, the SIGMA lens is user-friendly, boasting a lightweight design that makes it easy to carry and handle for extended periods. Its rubber-sealed mount enhances usability in diverse conditions, ensuring that photographers can focus on capturing their shots without worrying about environmental factors.

Which should you buy?

Choosing between the High-Power 420-1600mm lens and the SIGMA 18-50mm lens ultimately depends on your specific needs and budget. If you are looking for an affordable option that offers impressive zoom capabilities for wildlife or sports photography, the High-Power lens is an excellent choice at $139.99. However, if you need a compact, high-performance lens optimized for Canon RF Mount mirrorless cameras and are willing to invest in quality, the SIGMA lens at $599.99 is worth considering. Each lens has its strengths, making them suitable for different types of photographers.