Canon EF 75- vs Canon RF
Updated July 2026 — Canon EF 75- wins on focal length and weight, Canon RF wins on price and build quality.
The Canon EF 75-300mm lens is a more economical choice for versatile telephoto photography, while the Canon RF 50mm lens excels in low-light performance and portraiture.
Why Canon EF 75- is better
Price
$169.00 is cheaper than $219.00
Zoom Range
75-300mm offers more versatility
Weight
Lighter for travel compared to bulkier options
Why Canon RF is better
Aperture
f/1.8 allows better low-light performance
Autofocus
STM motor provides faster and quieter focusing
Image Quality
Better sharpness and background blur for portraits
Overall score
Specifications
| Spec | Canon EF 75- | Canon RF |
|---|---|---|
| Brand | Canon | Canon |
| Lens Type | Telephoto Zoom | Prime |
| Max Aperture | f/5.6 | f/1.8 |
| Autofocus | Micromotor | STM |
| Image Stabilization | No | No |
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 $169.00, making it the more economical choice compared to the Canon RF 50mm F1.8 STM Lens, which retails for $219.00. This telephoto zoom lens is designed for versatility, offering a focal length range of 75-300mm, which is particularly useful for capturing distant subjects, whether in sports photography or wildlife.
This lens features a front group rotating extension system with a micromotor for focus adjustment, allowing users to get close to subjects with a minimum focusing distance of 1.5m (4.9 ft.). Its construction includes 13 elements arranged in 9 groups, providing a diagonal angle of view ranging from 32° 11' at 75mm to 8° 15' at 300mm. This lens is an excellent option for photographers looking for a budget-friendly solution for telephoto photography.

Overview of the Canon RF 50mm F1.8 STM Lens
The Canon RF 50mm F1.8 STM Lens is a compact and lightweight lens priced at $219.00, which is about 30% more expensive than its competitor, the Canon EF 75-300mm. This lens is tailored for creative photography, particularly portraits, with its wide f/1.8 aperture allowing for impressive background blur and sharp image quality.
Equipped with an STM motor, this lens delivers smooth, fast, and near-silent autofocus, making it ideal for both still photography and video work. It also features an aspheric lens element and Super Spectra Coating, which help reduce flare and ghosting. The RF mount design ensures compatibility with EOS R-Series cameras, making it a versatile choice for modern photographers.

Image Quality Comparison
When it comes to image quality, the Canon RF 50mm F1.8 STM Lens stands out with its wider f/1.8 aperture, which allows for better low-light performance and shallow depth of field effects. This feature makes it particularly advantageous for portrait photography, where a soft background blur can significantly enhance the subject's appearance.
In contrast, the Canon EF 75-300mm lens, with its variable aperture of f/4-5.6, offers decent image quality across its focal range but may struggle in low-light situations compared to the RF 50mm. The 75-300mm lens is more suited for outdoor shooting or well-lit environments where its telephoto capabilities can shine, particularly in capturing distant subjects with clarity.
Autofocus Performance
Autofocus performance is crucial for capturing sharp images, and the Canon RF 50mm F1.8 STM Lens excels in this area. It utilizes an STM motor, which is designed for fast and quiet focusing. This feature is particularly beneficial for videographers who need to avoid distracting sounds during filming.
On the other hand, the Canon EF 75-300mm lens employs a micromotor for focus adjustment. While it is efficient, it may not match the speed and quietness of the RF 50mm’s STM technology. Photographers focusing on action shots or video recording may prefer the RF 50mm for its superior autofocus capabilities.
Versatility and Use Cases
The Canon EF 75-300mm is a versatile telephoto lens that is ideal for a range of photography styles, including wildlife, sports, and landscape photography. Its ability to zoom in on distant subjects makes it a valuable tool for outdoor shooting, allowing photographers to maintain distance while capturing detailed images.
Conversely, the Canon RF 50mm F1.8 STM Lens is more suited for portrait and street photography. Its compact size and lightweight design make it easy to carry around, while its wide aperture opens up possibilities for artistic shots and low-light conditions. Each lens caters to different needs, emphasizing the importance of selecting the right lens based on the intended shooting scenario.
Build and Design
In terms of build and design, the Canon RF 50mm F1.8 STM Lens is compact and lightweight, making it an excellent choice for photographers who prioritize portability. Its simple design and RF mount compatibility allow for a seamless experience with EOS R-Series cameras.
In contrast, the Canon EF 75-300mm lens is bulkier due to its zoom capability. While it is still manageable for most users, those who frequently travel or shoot on the go may find the RF 50mm more appealing due to its lightweight nature. Both lenses are designed with Canon's quality standards, ensuring durability and reliability in various shooting conditions.
Price Comparison
The price difference between the two lenses is significant, with the Canon RF 50mm F1.8 STM Lens costing $50 more than the Canon EF 75-300mm, which is priced at $169.00. This price difference of about 30% may influence buyers who are budget-conscious and looking for a telephoto option.
While the RF 50mm offers advanced features, such as a wide aperture and superior autofocus, the EF 75-300mm lens provides excellent value for those needing a versatile zoom lens without breaking the bank. This pricing aspect should be a key consideration for potential buyers when making their choice.
Which should you buy?
Choosing between the Canon EF 75-300mm f/4-5.6 III Telephoto Zoom Lens and the Canon RF 50mm F1.8 STM Lens ultimately depends on your photography needs. If you require a versatile telephoto lens for capturing distant subjects, the EF 75-300mm at $169.00 is a more affordable option that provides solid performance. However, if you are focused on portrait photography, creative shots, and low-light performance, the RF 50mm, with its superior aperture and autofocus capabilities, justifies its higher price of $219.00. Consider your primary photography style and budget when making your final decision.