Canon RF45mm F1.2 STM vs YNLENS YONGNUO YN50mm
Updated July 2026 — Canon RF45mm F1.2 STM wins on price and weight, YNLENS YONGNUO YN50mm wins on focal length and aperture.
The Canon RF45mm F1.2 STM lens offers superior optical performance and build quality, while the YONGNUO YN50mm 50mm f/1.8 lens is a budget-friendly option for beginners.
Why Canon RF45mm F1.2 STM is better
Optical Performance
Canon has a wider aperture for better low-light performance.
Build Quality
Canon lens is more durable and robust.
Versatility
Canon lens is suitable for a wider range of photography styles.
Why YNLENS YONGNUO YN50mm is better
Price
YONGNUO is significantly cheaper.
Weight
YONGNUO is lighter and more portable.
Ease of Use
YONGNUO is more beginner-friendly.
Overall score
Specifications
| Spec | Canon RF45mm F1.2 STM | YNLENS YONGNUO YN50mm |
|---|---|---|
| Autofocus | Yes | Yes |
| Manual Control | No | Yes |
| Bokeh | Excellent | Good |
| Compatibility | Canon RF | Nikon F |
| Lens Elements | 1 PMo Aspheric | 6 elements |
Dimension comparison
Introduction to the Canon RF45mm F1.2 STM and YONGNUO YN50mm 50mm f/1.8
The Canon RF45mm F1.2 STM lens and the YONGNUO YN50mm 50mm f/1.8 lens cater to different users with distinct needs in the photography realm. The Canon lens is priced at $469.00, while the YONGNUO lens is significantly cheaper at $102.00, making it about 78% less expensive. This comparison will delve into various aspects, including performance, build quality, and suitability for different photography styles, to help you decide which lens might be the better choice for your specific requirements.
Optical Performance
In terms of optical performance, the Canon RF45mm F1.2 STM lens offers superior low-light capabilities with its f/1.2 aperture, enabling faster shutter speeds in darker settings. This lens is designed to produce a three-dimensional look with beautiful bokeh, thanks to its large-diameter design. Conversely, the YONGNUO YN50mm 50mm f/1.8 lens, while it has a slightly narrower aperture of f/1.8, still delivers impressive results, especially for portraits with its 7-blade circular aperture that creates creamy background blur. The difference in aperture size results in the Canon lens providing greater light-gathering ability, which is essential for professional-quality images in challenging lighting conditions.
Build Quality and Design
When it comes to build quality, the Canon RF45mm F1.2 STM is designed with a robust construction that reflects its higher price point. It emphasizes durability while maintaining a compact size, ideal for creators on the go. On the other hand, the YONGNUO YN50mm 50mm f/1.8 lens is also lightweight, weighing only about 203 grams, making it easy to carry around. However, it employs a more budget-friendly design that may not withstand heavy use as well as the Canon lens. Users looking for a lens that combines strength with portability may prefer the Canon, while those seeking a cost-effective option may lean towards the YONGNUO.
Versatility in Use
The Canon RF45mm F1.2 STM lens is certainly versatile, suitable for a range of photography styles including portraits, lifestyle shots, and everyday narratives. Its wide aperture allows for stunning low-light photography and subject isolation, making it a great choice for creatives. In contrast, the YONGNUO YN50mm 50mm f/1.8 is also versatile, particularly for street photography and documentary work, thanks to its 50mm focal length that closely mimics human eye perspective. This lens excels in capturing detailed close-ups and is particularly suitable for food blogging and product photography. Both lenses serve different niches effectively, making the choice dependent on your specific photography needs.
Autofocus and Manual Control
The focus mechanisms of both lenses differ significantly. The Canon RF45mm F1.2 STM features a smooth autofocus system that is well-suited for both still photography and video. This lens's automated adjustments allow users to concentrate more on their creative vision rather than technicalities. The YONGNUO YN50mm 50mm f/1.8 lens also includes an autofocus feature but offers the option for manual control, allowing for greater flexibility in settings. This dual functionality can be particularly advantageous for photographers who prefer to have more direct influence over their depth of field and exposure settings.
Price Comparison
The price difference between these two lenses is stark, with the Canon RF45mm F1.2 STM retailing at $469.00 and the YONGNUO YN50mm 50mm f/1.8 available for just $102.00. This makes the YONGNUO lens approximately 78% cheaper than the Canon lens. While the lower price point makes the YONGNUO an attractive option for beginners or those on a budget, the Canon lens offers high-end features that justify its higher cost for serious photographers looking for professional results.
Target Audience
The Canon RF45mm F1.2 STM lens is ideally suited for professional photographers or serious enthusiasts who require excellent performance and versatility. Its advanced features make it a worthy investment for anyone looking to elevate their photography to a professional level. Conversely, the YONGNUO YN50mm 50mm f/1.8 is aimed at hobbyists or those who are just starting out in photography. Its affordability and ease of use make it a great option for casual shooters or those who need a reliable lens for everyday use without breaking the bank.
Which should you buy?
In conclusion, the choice between the Canon RF45mm F1.2 STM and the YONGNUO YN50mm 50mm f/1.8 largely depends on your budget and photography needs. If you are a professional or serious photographer seeking exceptional optical performance and build quality, the Canon lens is worth the investment at $469.00. However, if you are a budget-conscious beginner or someone who requires a reliable lens for casual photography, the YONGNUO lens at $102.00 is an excellent choice. Ultimately, both lenses serve their purpose well, making them valuable assets in their respective price ranges.

