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Canon RF45mm F1.2 STM vs BM Premium High-Power 420-

Updated July 2026 — Canon RF45mm F1.2 STM wins on aperture and image quality, BM Premium High-Power 420- wins on zoom and price.

The Canon RF45mm F1.2 STM excels in image quality and low-light performance, while the High-Power 420-1600mm lens offers versatility at a budget-friendly price.

Why Canon RF45mm F1.2 STM is better

Image Quality

Superior low-light performance and sharpness.

Build Quality

Premium materials and design.

Aperture

Wider f/1.2 aperture for better depth of field.

Why BM Premium High-Power 420- is better

Price

More affordable option for budget-conscious photographers.

Zoom Range

Significant zoom capabilities from 420mm to 1600mm.

Compatibility

Fits a wide range of Canon camera models.

Overall score

Canon RF45mm F1.2 STM
85
BM Premium High-Power 420-
70

Specifications

SpecCanon RF45mm F1.2 STMBM Premium High-Power 420-
Focal Length45mm420-1600mm
Aperturef/1.2f/8.3
Weight1.5 lbs2.5 lbs
CompatibilityRF MountEF Mount
Max Zoom1x3.8x

Dimension comparison

Canon RF45mm F1.2 STMBM Premium High-Power 420-

Overview of the Canon RF45mm F1.2 STM and High-Power 420-1600mm f/8.3 HD Manual Telephoto Zoom Lens

The Canon RF45mm F1.2 STM is a high-quality prime lens, while the High-Power 420-1600mm f/8.3 HD Manual Telephoto Zoom Lens is a versatile option for long-distance photography. Priced at $469.00, the Canon RF45mm offers superior low-light performance and image quality, whereas the High-Power lens, available for $139.99, is a more budget-friendly alternative aimed at capturing distant subjects.

The RF45mm lens is particularly designed for creators looking for a compact setup that excels in wide-aperture performance. In contrast, the High-Power telephoto lens is intended for photographers aiming to shoot sports or wildlife at great distances, providing a significant zoom range.

Image Quality and Performance

The Canon RF45mm F1.2 STM excels in image quality, particularly in low-light conditions, thanks to its large f/1.2 aperture. This wide aperture allows for faster shutter speeds, making it easier to capture sharp images in darker settings. The lens's design incorporates a PMo aspheric lens, which reduces aberrations, ensuring high-quality images.

On the other hand, the High-Power 420-1600mm lens offers a more moderate aperture of f/8.3. While it provides the capability to zoom in on distant subjects, the narrower aperture may not deliver the same quality in lower light compared to the RF45mm. The lens aims to provide clear long-distance shots, but it may struggle with detail in less-than-ideal lighting conditions.

Versatility and Usability

The High-Power 420-1600mm f/8.3 lens is designed for versatility, fitting a wide range of Canon cameras including the Rebel series, EOS 5D, and EOS 7D II. This compatibility makes it a go-to option for photographers who own multiple Canon models. Its extensive zoom range allows users to capture everything from wildlife to landscapes, adapting well to various shooting situations.

Conversely, the Canon RF45mm F1.2 STM is a prime lens that serves a more specialized purpose. While it excels in portrait and lifestyle photography, its fixed focal length limits versatility. However, for those focused on creating high-quality images with a beautiful bokeh effect, this lens is invaluable. It’s essential to consider what type of photography you plan to engage in when choosing between these two options.

Price Comparison

The price difference between the two lenses is significant, with the Canon RF45mm F1.2 STM priced at $469.00 and the High-Power 420-1600mm lens at $139.99. This places the RF45mm at about 235% higher than the High-Power lens. For photographers on a budget or those just starting out, the High-Power lens presents a compelling option, allowing for an entry into telephoto photography without a hefty investment.

However, for those willing to invest in higher-quality optics for superior image performance, the RF45mm is well worth the price. It’s essential to factor in what you aim to achieve with your photography when evaluating this price disparity.

Target Audience

The Canon RF45mm F1.2 STM is ideal for professional photographers and enthusiasts looking for exceptional image quality, especially in low-light conditions. Its ability to create stunning portraits with a soft background makes it a favorite among portrait and lifestyle photographers.

In contrast, the High-Power 420-1600mm f/8.3 lens appeals to a broader audience, including casual photographers and wildlife enthusiasts who need a lens capable of capturing distant subjects without requiring extensive financial commitment. Its ability to zoom from 420mm to 1600mm allows for a variety of photographic opportunities, particularly in outdoor settings.

Build Quality and Design

The Canon RF45mm F1.2 STM is designed with a large-diameter mount and short back focus, contributing to its compact size and lightweight feel. This thoughtful design enhances the user experience, making it easier to carry during long shoots. The quality of materials used in its construction ensures durability, making it suitable for serious photographers.

On the flip side, the High-Power 420-1600mm lens, while offering impressive reach, may not match the premium feel and build quality of the RF45mm. It is primarily a budget telephoto option, which may reflect in its construction. Users should consider how often they will use the lens and under what conditions to determine if the trade-offs in build quality are acceptable.

Special Features

The Canon RF45mm F1.2 STM features advanced optical technology that includes digital distortion correction and a unique aspheric lens design, which minimizes optical aberrations. This makes it an excellent choice for those who prioritize image quality and sharpness in their photography.

Conversely, the High-Power 420-1600mm lens includes a 2X teleconverter, effectively doubling its zoom capability. This feature is particularly enticing for users who need to capture distant subjects, allowing for greater flexibility in the field. However, it’s important to note that the lens's aperture does not allow for the same level of creativity with depth of field as the RF45mm.

Which should you buy?

Choosing between the Canon RF45mm F1.2 STM and the High-Power 420-1600mm f/8.3 HD Manual Telephoto Zoom Lens ultimately depends on your photography needs and budget. If you seek a lens that excels in image quality, particularly in low-light situations, and are willing to invest, the RF45mm is an outstanding choice at $469.00. However, if you are looking for a versatile and budget-friendly option that offers significant zoom capabilities for distant subjects, the High-Power lens at $139.99 may be the better fit. Each lens serves distinct purposes, so consider your photographic style and objectives when making a decision.