Canon EF 75- vs Canon RF45mm F1.2 STM
Updated July 2026 — Canon EF 75- wins on focal length and length, Canon RF45mm F1.2 STM wins on diameter.
The Canon RF45mm F1.2 STM excels in low-light performance and image quality, while the Canon EF 75-300mm offers versatility at a budget-friendly price.
Why Canon EF 75- is better
Price
More affordable option for budget-conscious photographers.
Versatility
Longer focal length range for diverse photography styles.
Weight
Lighter weight makes it easier to carry.
Why Canon RF45mm F1.2 STM is better
Aperture
Wider f/1.2 aperture for better low-light performance.
Image Quality
Superior optical design reduces aberrations.
Autofocus
Faster and more accurate autofocus system.
Overall score
Specifications
| Spec | Canon EF 75- | Canon RF45mm F1.2 STM |
|---|---|---|
| Price | $199.99 | $469.00 |
| Max Aperture | f/5.6 | f/1.2 |
| Focal Length | 75-300mm | 45mm |
| Weight | 16.8 oz | 15.5 oz |
| Autofocus | DC Motor | Modern AF |
Dimension comparison
Overview of the Canon EF 75-300mm f/4-5.6 III Telephoto Zoom Lens
The Canon EF 75-300mm f/4-5.6 III Telephoto Zoom Lens is priced at $199.99, making it a budget-friendly option for photographers seeking versatility. This lens is designed for Canon SLR cameras and features a focal length range of 75-300mm, providing a significant zoom capability that is ideal for capturing distant subjects like wildlife or sports. Its f/4-5.6 maximum aperture allows for decent low-light performance, although it lacks image stabilization, which may be a drawback for some users.
This telephoto lens boasts a relatively compact design, measuring 4.8 inches long and weighing 16.8 ounces, which enhances its portability. The inclusion of a DC motor for autofocus ensures smooth operation, although it may not be as fast as Canon's USM motors. Ultimately, this lens serves as an excellent entry point for photographers looking to explore telephoto photography without breaking the bank.
Overview of the Canon RF45mm F1.2 STM
The Canon RF45mm F1.2 STM is a standard prime lens that comes with a significantly higher price tag of $469.00. This lens is engineered for Canon's mirrorless camera systems and features a large f/1.2 aperture, allowing for exceptional low-light performance and beautiful bokeh. The fast aperture not only enables quicker shutter speeds in dim conditions but also helps isolate subjects from the background, creating a three-dimensional effect in images.
The RF45mm is compact and reasonably priced for a lens of its caliber, making it an appealing choice for creators who prioritize high-quality imagery. This lens incorporates advanced optical elements, including PMo aspheric lenses, which effectively reduce aberrations. As a result, the RF45mm is particularly well-suited for portrait and lifestyle photography, elevating the quality of everyday narratives captured by photographers.
Image Quality Comparison
In terms of image quality, the RF45mm F1.2 STM is superior due to its wide aperture and advanced optical design. The f/1.2 aperture allows for greater light intake, enabling sharper images in low-light settings compared to the f/4-5.6 aperture of the EF 75-300mm. While the telephoto lens excels in capturing distant subjects, its lack of image stabilization and smaller maximum aperture may lead to less clarity in challenging lighting.
The RF45mm also benefits from a design that minimizes optical aberrations, thanks to its unique lens construction. This is particularly beneficial for photographers looking to produce stunning portraits with creamy backgrounds. Conversely, the EF 75-300mm, although versatile, may yield softer images at its maximum focal lengths, especially in low-light conditions.
Versatility and Use Cases
The EF 75-300mm f/4-5.6 III is more versatile in terms of focal length, making it suitable for a broader range of photography styles, from sports to wildlife and even portraits at a distance. Its zoom capability allows photographers to adjust their composition without needing to change locations, which can be advantageous in dynamic shooting environments.
On the other hand, the RF45mm F1.2 STM excels in scenarios that require a fast lens, particularly in portrait photography where subject isolation is key. Its standard focal length makes it ideal for everyday use, capturing lifestyle shots and candid moments. While both lenses have their strengths, the choice ultimately depends on the photographer's specific needs and shooting style.
Build Quality and Design
Both lenses are built by Canon, ensuring a level of quality in construction. The EF 75-300mm features a robust design, measuring 2.8 inches in diameter and weighing 16.8 ounces, which adds to its portability. However, it does not include image stabilization, which may affect usability in various conditions.
In contrast, the RF45mm F1.2 STM, while being a prime lens, offers a compact design that is ideal for travel and street photography. The large-diameter mount and short back focus enhance its usability and performance. The RF lens's build quality reflects modern standards, aiming for durability and ease of use, particularly in demanding shooting conditions.
Autofocus Performance
The EF 75-300mm utilizes a DC motor for autofocus, which, while effective for general use, may not be as quick or precise as the USM motors found in higher-end models. This could be a disadvantage for photographers needing rapid focusing, especially in fast-paced environments.
In comparison, the RF45mm F1.2 STM benefits from modern autofocus technology that is designed for quick and accurate focus acquisition. This is particularly advantageous for portrait photographers who require precise control over their focal points. The enhanced autofocus capabilities of the RF lens may make it a more appealing choice for those who prioritize speed and accuracy in their photography.
Price and Value
With the EF 75-300mm priced at $199.99 and the RF45mm at $469.00, the price difference is significant, with the RF lens costing about 134% more. This price disparity reflects the differing capabilities and target users of each lens. While the EF 75-300mm offers a budget-friendly option for those venturing into telephoto photography, the RF45mm provides professional-level features aimed at serious creators.
The value proposition of each lens varies based on the photographer's needs. The EF 75-300mm is an excellent value for those who need flexibility without a hefty investment. In contrast, the RF45mm F1.2 STM represents a worthwhile investment for photographers seeking high-quality imagery and superior performance in low-light conditions.
Which should you buy?
Choosing between the Canon EF 75-300mm f/4-5.6 III Telephoto Zoom Lens and the Canon RF45mm F1.2 STM ultimately boils down to your photographic needs and budget. If you require a versatile lens for various shooting scenarios and are on a budget, the EF 75-300mm is a solid option. However, if you prioritize exceptional low-light performance, stunning bokeh, and are willing to invest more for professional-quality results, the RF45mm F1.2 STM is the lens for you. Each lens serves its purpose well, catering to different types of photographers and their unique styles.

