Canon RF 50mm vs EF 50mm (November 2025) Ultimate Comparison

As a photographer who’s spent countless hours with both these lenses, I’m excited to share my comprehensive comparison between the Canon RF 50mm f/1.8 and the EF 50mm f/1.4. If you’re like me, you’ve probably found yourself staring at these two options, wondering which one deserves a spot in your camera bag. I’ve been there, done that, and I’m here to break down everything you need to know to make the right choice for your photography journey.

Table of Contents

Why This Comparison Matters?

I remember when I first started exploring the world of prime lenses. The 50mm focal length is often called the “nifty fifty” for good reason – it’s versatile, affordable, and can produce stunning images. But with Canon’s transition to mirrorless cameras and the RF mount, photographers now face an interesting choice: stick with the classic EF 50mm f/1.4 or embrace the newer RF 50mm f/1.8.

When I made the switch to Canon’s mirrorless system, I found myself asking the same questions you probably have right now. Which lens offers better value? Which one will give me that dreamy bokeh I’m after? And most importantly, which one will help me create the best images possible?

Quick Specs Comparison

Let me start with a quick overview of the key specifications I’ve discovered through my testing:

Feature	Canon RF 50mm f/1.8 STM	Canon EF 50mm f/1.4 USM
Price	~$199 USD	~$399 USD ($200 used)
Weight	160g	290g
Length	40mm	50.5mm
Filter Size	43mm	58mm
Aperture Blades	7 (rounded)	8
Minimum Focus Distance	0.3m	0.45m
Magnification	0.25x	0.15x
Autofocus Motor	STM	USM
Weather Sealing	None	None
Control Ring	Yes	No

Build Quality and Design: First Impressions Matter

When I first picked up the RF 50mm f/1.8, I was genuinely surprised by how it felt in my hands. Unlike the older EF 50mm f/1.8 versions that earned the “plastic fantastic” nickname, this RF version feels substantial and well-built. The plastic construction doesn’t feel cheap at all – in fact, I’d say it’s on par with many of Canon’s mid-range lenses.

The EF 50mm f/1.4, on the other hand, has that classic Canon feel. It’s noticeably heavier at 290g compared to the RF’s feather-light 160g, but that extra weight gives it a sense of solidity that I appreciate. The metal mount on both lenses is a nice touch, though I wish Canon had included weather sealing on either option.

One feature I absolutely love on the RF version is the control ring. I’ve set mine to control exposure compensation, and it’s become second nature to use it while shooting. The EF lens lacks this modern convenience, which is something to consider if you’re used to mirrorless ergonomics.

Image Quality: Where the Rubber Meets the Road

This is where things get really interesting. I’ve spent weeks testing both lenses in various conditions, and I’ve discovered some surprising results.

Sharpness Performance

I was shocked to find that the RF 50mm f/1.8 actually outperforms the EF 50mm f/1.4 in terms of sharpness, especially when shooting wide open. According to my tests and DxOMark data, the RF lens scores an impressive 29 P-MPix in sharpness, while the EF lens manages only 10 P-MPix.

In real-world shooting, this translates to noticeably crisper images from the RF lens, particularly at f/1.8 and f/2.8. I discovered this during a portrait session where I was shooting both lenses back-to-back. The RF lens captured every eyelash and skin texture with remarkable clarity, while the EF lens produced softer, more dreamy results.

However, here’s the catch: the EF 50mm f/1.4 is practically unusable at f/1.4 on high-resolution cameras. I learned this the hard way during a product shoot – the images were so soft that I had to stop down to f/2.8 to get acceptable results. The RF lens, by contrast, is actually quite usable at f/1.8, which is a huge advantage in low-light situations.

Bokeh and Background Rendering

Both lenses can create beautiful background blur, but they do it in different ways. The EF 50mm f/1.4, when stopped down to f/2.8 or f/4, produces that classic creamy bokeh that portrait photographers love. There’s something magical about the way it renders out-of-focus areas – it has character and depth that’s hard to quantify but easy to appreciate.

The RF 50mm f/1.8, while not quite as dreamy wide open, still produces very pleasing bokeh. I’ve found that it’s more neutral and technically correct, which some photographers might prefer. The rounded aperture blades help create smooth circular highlights, and I’ve been impressed with how well it handles complex backgrounds.

Chromatic Aberration and Optical Issues

This is one area where the RF lens clearly shines. I’ve noticed significantly less chromatic aberration with the RF version – only about 4 µm compared to the EF lens’s 12 µm. In practical terms, this means fewer purple and green fringes in high-contrast situations, which saves me time in post-processing.

The EF 50mm f/1.4 struggles with chromatic aberration when shot wide open, especially in backlit situations. I’ve had to spend extra time in Lightroom cleaning up these issues, which can be frustrating when you’re on a tight deadline.

Autofocus Performance: Speed and Accuracy

Autofocus is where these two lenses show their generational differences. The EF 50mm f/1.4 uses Canon’s older USM (Ultrasonic Motor) technology, while the RF lens features the newer STM (Stepping Motor) design.

In my experience, the EF lens focuses slightly faster and more decisively, especially in good light. The USM motor has that satisfying “snap” when it locks onto a subject, and it’s noticeably quieter than the STM motor in the RF lens.

However, the RF lens benefits from Canon’s latest autofocus algorithms in mirrorless cameras. I’ve found that while it might be slightly slower, it’s more accurate overall, especially in challenging lighting conditions. The eye detection on my EOS R6 works beautifully with the RF lens, making portrait sessions much more efficient.

One thing I don’t love about the RF lens is the STM motor noise. It’s not terrible, but it’s definitely noticeable in quiet environments. If you do a lot of video work, this might be something to consider.

Low Light Performance: When the Sun Goes Down

Both lenses are capable in low light, but they excel in different ways. The EF 50mm f/1.4 has that extra stop of light gathering capability (f/1.4 vs f/1.8), which theoretically makes it better for low-light situations.

In practice, though, I’ve found that the RF lens often produces better results in low light because it’s sharper at its maximum aperture. There’s no point having that extra f-stop if the images are too soft to use, right?

I discovered this during a night photography session in the city. I was shooting both lenses at their widest apertures, and while the EF lens let in more light, the RF lens produced cleaner, more detailed images that required less noise reduction in post-processing.

Versatility and Use Cases

After extensive testing with both lenses, I’ve identified specific scenarios where each lens shines:

When to Choose the RF 50mm f/1.8:

Travel Photography: At just 160g, this lens is a dream for travel. I can carry it all day without fatigue, and it takes up virtually no space in my bag.
Everyday Shooting: The control ring and modern autofocus make it perfect for daily use with mirrorless cameras.
Street Photography: Its compact size and quiet autofocus (relatively speaking) make it less conspicuous.
Product Photography: The superior sharpness and minimal chromatic aberration make it ideal for detailed product shots.
Video Work: While not completely silent, the STM motor is smooth enough for most video applications.

When to Choose the EF 50mm f/1.4:

Portrait Photography: When stopped down to f/2.8 or f/4, it produces beautiful, flattering portraits with that classic Canon look.
EF Mount Cameras: If you’re still using a DSLR, this is obviously the only choice of the two.
Low-Light Events: That extra f-stop can make a difference in very dark environments, provided you’re willing to stop down slightly.
Budget-Conscious Buyers: You can often find used EF 50mm f/1.4 lenses for around $200, making them a great value.

The Adapter Question: Using EF Lenses on RF Bodies

One important consideration I haven’t mentioned yet is the use of Canon’s EF-RF adapter. If you’re shooting with a mirrorless Canon camera, you can use the EF 50mm f/1.4 with the official adapter.

I’ve tested this combination extensively, and while it works well, there are some compromises. The adapter adds bulk and weight to an otherwise compact setup, and I’ve noticed that autofocus performance isn’t quite as good as native RF lenses.

That said, if you already own the EF 50mm f/1.4 and are transitioning to mirrorless, the adapter is a perfectly viable solution. I used it for several months before deciding to invest in native RF lenses, and it served me well.

Value for Money: The Bottom Line

Let’s talk about value, because at the end of the day, that’s what matters most to most photographers.

The RF 50mm f/1.8 at $199 is an absolute steal. I’m consistently amazed by the image quality it produces for the price. It’s one of those rare products that punches way above its weight class, and I recommend it without hesitation to anyone shooting with Canon’s mirrorless system.

The EF 50mm f/1.4 at $399 new is more of a mixed bag. At full price, I’d have a hard time recommending it over the RF lens, especially for mirrorless shooters. However, the used market changes everything. At around $200, it becomes a compelling option, particularly for DSLR users or those who specifically want the f/1.4 aperture and classic Canon rendering.

My Personal Experience and Recommendation

After months of shooting with both lenses, I’ve settled on the RF 50mm f/1.8 as my go-to 50mm lens. The combination of excellent sharpness, compact size, and modern features like the control ring make it perfect for my style of photography.

I do miss the extra light gathering capability of the EF lens sometimes, but I’ve learned to work around it by pushing my ISO a bit higher or using a slightly slower shutter speed. The trade-off in sharpness and portability is worth it for me.

That said, I still keep the EF 50mm f/1.4 in my bag for specific situations. When I want that classic, dreamy look for portraits, or when I’m shooting with my older DSLR bodies, it’s still a valuable tool in my arsenal.

Pro Tips for Getting the Most from Your 50mm Lens

Whether you choose the RF or EF version, here are some tips I’ve learned that will help you get the best results:

Stop Down for Sharpness: Both lenses perform better when stopped down slightly. I usually shoot the RF lens at f/2.8 or f/4 for critical sharpness, and the EF lens at f/4 or f/5.6.
Focus Carefully Wide Open: When shooting at maximum aperture, take extra care with your focus point. I use single-point autofocus and magnify the image to ensure perfect sharpness.
Embrace the Focal Length: 50mm is incredibly versatile. I use it for everything from portraits to landscapes to street photography. Don’t limit yourself to just one type of shooting.
Experiment with Distance: The minimum focus distance on the RF lens is surprisingly close. I’ve discovered some great macro-like shots by getting as close as possible to my subjects.
Use the Control Ring: If you go with the RF lens, take time to customize the control ring to your shooting style. I have mine set to exposure compensation, and it’s become second nature to use it.

Final Verdict: Which One Should You Buy?

After all this testing and real-world use, here’s my honest recommendation:

Choose the Canon RF 50mm f/1.8 if:

You shoot with Canon mirrorless cameras
You prioritize sharpness and modern features
You want a lightweight, portable lens
You’re on a budget but still want excellent quality
You do video work alongside still photography

Choose the Canon EF 50mm f/1.4 if:

You shoot with Canon DSLR cameras
You specifically want f/1.4 aperture capability
You prefer the classic Canon rendering and bokeh
You can find a good deal on the used market
You don’t mind stopping down for sharpness

For most photographers entering the Canon mirrorless ecosystem, I believe the RF 50mm f/1.8 is the clear winner. It represents the future of Canon’s lens lineup and offers incredible value for money. The EF 50mm f/1.4, while still a capable lens, is showing its age and is better suited for those with specific needs or existing EF mount systems.

Save This for Later

Photography gear decisions can be overwhelming, and I know how valuable it is to have reliable information when making these choices. I’d recommend bookmarking this article for future reference, especially if you’re considering upgrading your gear in the coming months.

Camera technology evolves quickly, and I’ll be updating this comparison as new lenses and cameras hit the market. Make sure to check back regularly for the latest information and recommendations.

Frequently Asked Questions

Can I use the EF 50mm f/1.4 on Canon mirrorless cameras?

Yes, you can use the EF 50mm f/1.4 on Canon mirrorless cameras with the official EF-RF adapter. I’ve tested this combination extensively, and while it works well, you’ll notice some compromises in size, weight, and autofocus performance compared to native RF lenses.

Is the RF 50mm f/1.8 weather sealed?

Unfortunately, no. Neither the RF 50mm f/1.8 nor the EF 50mm f/1.4 features weather sealing. This is something to keep in mind if you frequently shoot in challenging weather conditions. I recommend being cautious with both lenses in rain or dusty environments.

Which lens is better for video?

The RF 50mm f/1.8 is generally better for video work. While its STM motor isn’t completely silent, it’s smoother than the EF lens’s USM motor. The control ring is also very useful for video, allowing you to make smooth adjustments to exposure or audio levels while recording.

How does the build quality compare between the two lenses?

The RF 50mm f/1.8 has surprisingly good build quality for its price point. While it’s made of plastic, it feels substantial and well-constructed. The EF 50mm f/1.4 also has a plastic body but feels more solid due to its extra weight. Both feature metal mounts, which is a nice touch at their respective price points.

Which lens produces better bokeh?

This is subjective, but I find that the EF 50mm f/1.4 produces more characterful bokeh when stopped down to f/2.8 or f/4. The RF 50mm f/1.8 has technically good bokeh but it’s more neutral and less distinctive. If you love that classic creamy Canon look, the EF lens might be more to your taste.

Is the extra cost of the EF 50mm f/1.4 worth it?

At full retail price ($399), I’d say no for most photographers. The RF 50mm f/1.8 offers better sharpness and modern features for half the price. However, if you can find a used EF 50mm f/1.4 for around $200, it becomes a much more compelling option, especially if you specifically need the f/1.4 aperture.

Can I achieve professional results with these lenses?

Absolutely! I’ve used both lenses for professional work with excellent results. The RF 50mm f/1.8, in particular, is capable of producing stunning images that hold up to professional scrutiny. Don’t let the affordable price fool you – these are serious photographic tools in the right hands.

Which lens is better for portraits?

Both lenses can produce beautiful portraits, but they have different characteristics. The EF 50mm f/1.4, when stopped down to f/2.8, produces that classic dreamy look that many portrait photographers love. The RF 50mm f/1.8 is sharper and more modern-looking, which can be great for detailed portraits where you want to capture every texture.

How do these lenses compare to more expensive options like the RF 50mm f/1.2L?

The RF 50mm f/1.2L is in a completely different league in terms of build quality, wide-open performance, and overall image quality. However, it’s also significantly more expensive (around $2,300). For most photographers, the RF 50mm f/1.8 offers 90% of the performance for 10% of the price, which makes it an incredible value.

Should I upgrade from the EF 50mm f/1.8 to either of these lenses?

If you’re currently using the EF 50mm f/1.8 and have moved to a mirrorless camera, I’d definitely recommend upgrading to the RF 50mm f/1.8. The improvements in build quality, autofocus performance, and image quality are significant. If you’re still using a DSLR, the upgrade to the EF 50mm f/1.4 might be worth considering if you need better low-light performance and don’t mind stopping down for sharpness.

I hope this comprehensive comparison has helped you make an informed decision about which 50mm lens is right for your photography needs. Both lenses have their strengths and weaknesses, but I believe the RF 50mm f/1.8 represents the better choice for most photographers entering the Canon mirrorless ecosystem.

Remember, the best lens is the one that inspires you to get out and shoot. Whichever you choose, I encourage you to spend time getting to know its characteristics and pushing its limits. That’s where the real magic happens in photography!

Happy shooting, and feel free to drop any questions in the comments below. I’m always happy to help fellow photographers on their journey.