Canon EF 50mm F/1.8 STM Lens Review

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Canon keeps bringing new lenses on the market to make photography more fun. They take customer reviews seriously and then introduce new lenses with the features that they demand.

This time around, Canon has come up with a fixed focal length lens.

The Canon EF 50mm F/1.8 STM is one of the most awaited lens on the market at the moment. 

It has the right focal length for a whole lot of photography situations. It has many other amazing features to offer its buyers as well. It has the same signature small size and weight that Canon lenses have with much more to help you. So, let’s have a look at what Canon EF 50mm F/1.8 STM is all about.

Canon EF 50mm f/1.8 STM Lens
  • 50 millimeter focal length and maximum aperture of f/1.8
  • Great for portraits, action, and nighttime photography; Angle of view (horizontal, vertical,...
  • Minimum focusing distance of 1.15 feet (0.35 meter) and a maximum magnification of 0.21x

Canon Ef 50mm F/1.8 STM

Canon EF 50mm f/1.8 STM Lens


  • Soft background for a dreamy bokeh
  • Has an easier mount with an electrical focus
  • Auto focus to help save your time and energy
  • Greater sharpness due to quick shutter closure
  • High-quality construction elements increase their reliability


  • Does not work well for videography
  • Hard to mount the lens on cameras
  • Light fall-off around the edges of images

Main Features

Canon EF 50mm f/1.8 has a lot to offer to you if you choose to buy it. The offerings extend from the compact and stylish appearance to the highly complex angles of view. Here are some of the major features that you are sure to get with it.

Focal Length

The focal length is one of the most important things about a lens. It helps you determine the range of distance that you can cover with it. It affects the focus on your subject and the clarity of background as well. This is why a moderate focal length is a must. The Canon EF 50mm F/1.8 STM has a fixed focal length of 50 mm. It enables users to continue working on a diverse range of subjects. And the fact that the focal length is fixed makes it easier for the users to set a focal point. 

Aperture Type

The aperture type has a direct effect on the amount of light that enters a lens. This influences the level of brightness and optical performance. This lens has an f/1.8 aperture that stands out from others on the market. The aperture is just perfect for outdoor and indoor photography. So, you are going to put it to a lot of work if you choose to get it.

Angle of View

The angle of view is another cool thing about this lens. The angles of view are wide enough to provide photographers a wider horizon through the lens. The range of vision that they offer is quite impressive in all directions. The horizontal and vertical angles of view are 40 and 27 degrees, respectively. Other than these, the diagonal angle of view is 46 degrees, which maximizes the range of vision. All of these make for a highly impressive lens on the whole.


The Canon EF 50mm F/1.8 STM lens is one of the most commonly used lenses by Canon. This is because of the remarkable ways in which it influences photography for people. It does not only improve optical performance but also helps photographers in polishing their skills. This is just the surface benefit of getting a Canon EF 50mm F/1.8 STM. Here are some of the pros that you will get after buying it.

EF Mount

The lens under review has an EF mount type. This is the standard mount for new Canon lenses that have better sensors. The EF mount or electric mount attaches directly to the film of the camera and needs no adapters. Meanwhile, other lenses come with a DF mount that needs an adapter. This improves the clarity of images as well as reduces the weight of the camera. 


One of the many perks of the Canon EF 50mm F/1.8 STM lens is the sharpness that it provides to images. The aperture is super-fast with the f/1.8, which has a swift closure. This makes the subject catch more light, and the image gets sharper. The crop effect of the images is also quite impressive due to the sharpness that it offers. 


The Canon EF 50mm F/1.8 STM lens is popular for its focusing ability. The focal length of 50 mm is more than enough to provide a better focus on even the distant objects. It has both auto and manual focus abilities, and this satisfies almost all photographers. The focus-by-wire is the operation principle for manual focusing, while the auto focus takes about 0.3 seconds. In addition, the minimum focusing distance is 1.15 feet, which further helps you in focusing better. 


The trick to having the most magical photographs is to have the right bokeh, isn’t it? This is proof of the Canon EF 50mm F/1.8 STM. It helps you achieve the exact bokeh that you want for an image. Whether it’s the background or the sides that you want to blur out, this lens will help you. The shutter speed and aperture width make the bokeh so dreamy that you will want in all images. 

Superior Construction

Another great thing about the Canon EF 50mm F/1.8 STM lens is its construction quality. Although it is quite cost-effective, its quality is just as good as an expensive lens. The multiple coatings on the glass surface make it scratch-resistant and weatherproof. Moreover, the body is not prone to rust or breakage too. So, you can have this one for a long time without having to worry about any damage.


Even the best of the best have some issues, and this holds true for Canon EF 50mm F/1.8 STM lens too. It has some of the most attractive features, but it has some downsides as well. Let’s have a glance at them too before you go ahead and buy it. 

Light Fall-Off

Light fall-off is something that you do not expect from a Canon lens, isn’t it? But the Canon EF 50mm F/1.8 STM lens does have a minor fall-off of light around the edges. This happens only when the aperture is open at the maximum width point. The light fall-off is not something too extreme, so it will not cause any major problems for you. 

Still Photography Only

The Canon EF 50mm F/1.8 STM lens is one of the best photography lenses on the market. But, it is good only for still shots. If you want to make short films or documentaries, then it will not help you. This is due to the shakiness in videos that have been observed by users. You can still overcome it if you have a tripod to steady the vision.

Tricky Mounting

One of the perks of getting a Canon EF 50mm F/1.8 STM lens is its EF mount type. But it can be problematic too. It makes screeching noises when you try to mount it on a camera. 

What is the Canon EF 50mm F/1.8 STM Lens Best For?

The Canon EF 50mm F/1.8 STM lens is a widely liked lens and rightfully so. It has some of the coolest features that users love. Here are some of the things that this lens is best for.


Portraits are usually close-up shots, and they need you to have a better focus on the subject than on the background. This can be a little tricky for even professional photographers, as there are different textures. But Canon EF 50mm F/1.8 STM lens helps in capturing some of the best portraits.

Night Photography

Now, night photography is something that not all camera lenses are good at. The Canon EF 50mm F/1.8 STM lens has a great low light performance due to a wide aperture. This makes it capture more light even at night. So, you can use it for night photography easily. You can even use it for astrophotography if you have a magnifier in your photography kit. 

Nature Photography

Nature photography is a passion of many photographers as it brings a variety of subjects. But getting the perfect landscape shots is hard when there are several colors. This is where the bokeh of Canon EF 50mm F/1.8 STM lens helps in keeping the shots perfect. 

What Do I Need To Know Before Buying?

Buying the right lens is the most critical step in photography. It has to be great in terms of things you do with it and the pricing policy. So, you have to be very careful about the following aspects while you are buying a lens.

Ease of Use

Ease of use of a lens affects your photography to a great extent. This is because if you feel comfortable enough, you will take perfect shots. But if the camera or lens is hard to handle, you will not like it. The size of the lens should be small, and the weight has to be low too. 

Frame Dimensions

The dimensions of the frame of a lens are important as they determine its size. The size then has an impact on the mounting and use of the lens, both. So, make sure that you go for a compact lens like Canon EF 50mm F/1.8 STM.

Chromatic Aberration

Chromatic aberration can ruin an image completely as there is a distortion of light. This causes the image to look all blurry and out of focus, which kills the purpose of a lens. Thus, you should go for a model that has a minimum chromatic aberration in it.

Bottom Line

Keeping it all in mind, we can say that the Canon EF 50mm F/1.8 STM lens is one of the most economical and high-quality lenses. It has the right size for you to stay invisible and blend with the crowd. This, then, makes it great for street photography too. The focal length, aperture, and other technical features are quite impressive and bring customers great satisfaction. 

As the lens has active controls on light distortion, it keeps the images realistic and intact. So, this is a must for all the photographers who have newer models of cameras.

People Also Ask

The Canon EF 50mm F/1.8 STM lens has served a lot of photographers well. This is why they recommend it to others too. But new buyers do not have much information about this lens, and they ask many questions. Here are the answers to those questions to help them out. 

Does the Canon 50mm 1.8 Lens Zoom?

Yes, you can zoom the Canon 50 mm 1.8 lens. It has a fixed focal length, but it can magnify the object. This helps you in focusing on all the right details in a subject. The presence of both manual and auto focus makes zooming it quite easy.

Does Canon 50mm 1.8 Work on Full Frame?

Yes, the Canon 50 mm 1.8 works on full-frame. It has such a sleek construction and low weight that it adjusts well to the full-frame. The filter size is also quite practical, so you won’t have any issues in using it on a full-frame. 

What is the Difference Between USM and STM Lens?

USM or Ultrasonic motor lenses are for professional users while STM or silent motor lenses are for beginners. USM lenses are tricky to handle, while STM ones do not need any complex techniques for use. Moreover, STM lenses are more suitable for videography, while the USM ones are for still shots.