BM Premium High-Power 420- vs Tamron 17-
Updated July 2026 — BM Premium High-Power 420- wins on zoom, Tamron 17- wins on price and weight.
The High-Power lens is an affordable option for Canon users focused on long-distance photography, while the Tamron lens offers superior optical quality and versatility for Sony users.
Why BM Premium High-Power 420- is better
Price
High-Power lens is significantly cheaper at $139.99.
Zoom Range
High-Power lens offers a much longer zoom range.
Weight
High-Power lens is lighter and more portable.
Why Tamron 17- is better
Optical Quality
Tamron lens has superior optical performance.
Build Quality
Tamron lens features moisture-resistant construction.
Stability
Tamron lens includes advanced Vibration Compensation.
Overall score
Specifications
| Spec | BM Premium High-Power 420- | Tamron 17- |
|---|---|---|
| Focal Length | 420-1600mm | 17-70mm |
| Aperture | f/8.3 | f/2.8 |
| Compatibility | Canon | Sony |
| Focus Type | Manual | Auto |
| Moisture Resistance | No | Yes |
Dimension comparison
Price Comparison
The High-Power 420-1600mm f/8.3 HD Manual Telephoto Zoom Lens is priced at $139.99, while the Tamron 17-70mm f/2.8 Di III-A VC RXD Lens comes in at $599.00. This makes the Tamron lens about 329% more expensive than the BM Premium lens. For photographers on a budget, the High-Power lens presents a significantly lower entry point without sacrificing the capability to capture long-range shots. However, the price of the Tamron lens reflects its advanced features and performance, especially for those using Sony APS-C mirrorless cameras.
Compatibility and Use Cases
The High-Power lens is specifically designed to be compatible with a wide range of Canon cameras, including popular models like the EOS 80D and 90D. In contrast, the Tamron lens is tailored for Sony APS-C mirrorless cameras, making it an excellent choice for users of this system. The High-Power lens excels in long-distance photography, ideal for capturing wildlife or sports, while the Tamron lens is suited for everyday use with its versatile zoom range of 17-70mm. This makes the Tamron lens a more practical option for general photography needs.
Zoom Capability
The High-Power lens offers impressive zoom capabilities, ranging from 420mm to 1600mm, allowing photographers to get incredibly close to distant subjects. It even includes a 2X teleconverter that doubles its power. On the other hand, the Tamron lens provides a more modest zoom range of 17mm to 70mm but boasts a constant f/2.8 aperture throughout its range. While the High-Power lens excels in long-range shots, the Tamron lens is ideal for capturing a variety of scenes, from landscapes to portraits, with a consistently bright aperture.
Optical Performance
The optical performance of the Tamron lens is enhanced by its construction of 16 elements in 12 groups, including specialized elements like Glass Molded Aspherical lenses. This sophisticated design contributes to outstanding image quality, especially in challenging lighting conditions. The High-Power lens, while effective for long-distance photography, does not have the same level of optical refinement. This difference in optical construction means that while the High-Power lens can capture distant subjects, the Tamron lens is likely to produce sharper and more vibrant images overall.
Build Quality and Features
The Tamron lens is built with moisture-resistant construction and features a fluorine coating, making it more durable and easier to maintain in various weather conditions. This attention to build quality is particularly beneficial for outdoor photographers. In contrast, while the High-Power lens is an effective tool for long-distance shooting, it lacks the same protective features. For users who frequently shoot in unpredictable environments, the Tamron lens’s robust construction provides added peace of mind.
Focus and Stability
The Tamron lens includes an upgraded Vibration Compensation (VC) system that effectively minimizes camera shake and enhances stability, particularly when shooting video. This feature is especially beneficial for videographers who want smooth, steady shots. The High-Power lens, being a manual focus lens, requires more skill and precision to achieve focus, which can be challenging in fast-moving situations. The ease of use with the Tamron lens makes it a better choice for those who prioritize quick and reliable autofocus capabilities.
Weight and Portability
The High-Power lens is designed to be portable and lightweight, making it easier to handle during long shooting sessions, especially when traveling for wildlife photography. However, the Tamron lens, while also relatively lightweight for its category, is slightly bulkier due to its advanced features and construction. This difference in weight can affect a photographer's choice based on their shooting style and whether they prioritize portability over advanced capabilities.
Which should you buy?
Choosing between the High-Power 420-1600mm lens and the Tamron 17-70mm f/2.8 lens depends largely on your camera system and photographic needs. If you are a Canon user looking for an affordable option for long-distance photography, the High-Power lens offers exceptional value at $139.99. However, if you own a Sony APS-C mirrorless camera and desire a versatile, high-performance lens for everyday photography with excellent optical quality, the Tamron lens, despite its higher price of $599.00, is the better investment. Ultimately, your choice should reflect your specific photography requirements and the systems you are using.

