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Canon EF 50mm f/1.8 STM : Specifications and Opinions

The Canon EF 50mm f/1.8 STM is a standard lens for FF and APS-C, manufactured from 2015. The focus is done by Stepper Motor, it does not have image stabilization. The average price is 150 €;

274 users have given it an average vote of 9.2 out of 10.

MOUNT

This lens is available with the following mounts:

Canon EF: this lens is compatible with reflex fullframe and APS-C Canon EF.

Specifications

Reviews (126)

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Specifications
Focal lenght	50 mm
Angle of view	46.8°
Format	FF, APS-C
Max. aperture	1.8
Aperture blades	7
Lenses/Groups	6 elements in 5 groups
Min. focus distance	0.35 metri
Reproduction ratio	0.21x
Features
Zoom type	-
Autofocus	Stepper Motor
Internal Focus	Yes
Stabilization	No
Built and notes
Tripod ring	No
Extenders	No
Filters	49
Lens hood	Yes (not supplied)
Weather sealing	No
Weight	160 g
Dimensions	69 x 39 mm
Production	2015
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Reviews

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Ecka

sent on 17 Settembre 2018

Pros: Interesting bokeh at F1.8, kind of sharp enough in the middle, which is fine for portraits, but rather soft overall wide open. Quite usable though. Not much CA. Sharp from F2.5, excellent from F4. STM - silent and faster AF than in the older EF 50F1.8 II lens. Now with 7-blade aperture and closer focusing distance. Small. Weights almost nothing. CHEAP!

Cons: Odd 49mm filter thread, down from 52mm on the older one. STM is focus by wire, which means that when the battery dies, you cannot "park" the lens front element back inside and it will be sticking out. Flares badly, but some (?many) people like it very much.

Opinion: This one is simply the best value lens, period. A must-have Canon prime with good old (traditional) Double-Gauss optics in a new plastic barrel. Well, why fix something that isn't broken ... Right? :). Unless you want to compromise it somehow. Some say that this new STM version has worse vignetting than the older lens. I didn't check it myself, because I don't find it to be a problem really. Still, it might be worth mentioning. If I had to choose between 35L on APS-C and this 50 STM on FF, I would take the 50+FF.

The following opinions have been automatically translated with Microsoft Translate.

Icedtea

sent on 3 Ottobre 2026

Pros: price, blurry. sharpness, weight/dimensions, colors, aperture

Cons: Pathetic AF, perceived as decidedly cheap

Opinion: For the price it costs it is absolutely a must have, you use it as 50 on FF and as 80 on aps-c so versatile and it is definitely a blade at f5.6, the speech changes from 1.8 up to f4 but acceptable anyway. Too bad for the af that despite being STM is woody, noisy and complicated to use unless you use only the single center point, nothing special about the manual focus ring, indeed a bit narrow I would say ... anyway beautiful colors, decent final yield grade 8

Zio Raffy

sent on 18 Dicembre 2025

Pros: Sharpness, size, yield, price

Cons: Af a bit iffy

Opinion: A gem. Taken a while ago around 100€, it is practically the lens that I have mounted on my camera 90% of the time. It has a very good image rendering and with a not very large machine it is a pleasure to transport. The AF sometimes, especially with low light, does not give the best of itself but in most cases I have never had major problems in this respect. Ultimately, at that price there are very few (logically new) targets of this level

Edoardovisuals

sent on 6 Settembre 2025

Pros: Price - sharpness - build quality - aperture - size

Cons: Autofocus sometimes inaccurate - chromatic aberration (but for what it costs, sometimes under 130€ on Amazon, I would say it may not have flaws...)

Opinion: I did everything, practically everything. Initially taken as a portrait lens, a bit attracted by the advantageous price of the period, in the end I can say that I always carried it with me and used it for purposes such as street, portraiture, landscape and even sports photography (I took it to Imola and Monza and, among all the other photographers with L-series lenses or other much more expensive ones, in my opinion he gave everyone my "fifty" to drink). Why all this? In my opinion it is a versatile lens if you get used to the fact that on APS-C it is practically an 80mm. You have to think differently and find different compositions than usual. Instead, for sports photography it seems like a favorite: if you go to the racetrack and shoot from the grandstand, with an 80mm you look great! A few tips: never shoot at TA, even if that f/1.8 attracts you, to have a nice bokeh f/2.8 is already fine. For sharpness, on the other hand, already at f/5.6 it is excellent. The autofocus sometimes plays tricks on me (but it will definitely be my camera's fault) and is relatively noisy, in videos you will certainly hear it a little, but if you use a nice external microphone in my opinion it is not a problem. However, if I let you try my first gen 35-80. surely you would say that the fifty in comparison is very quiet! Shooting on a 2000D (I'm sorry, it's not my fault...) I can practically not make videos, so I can't give you tips on this aspect, for me on this camera body not being able to connect an external microphone is limiting without considering that there is no continuous focus... Coming back to us, and I conclude, it is a lens definitely to have in your photographic kit and, for its price, it is fantastic.

Francesco Redaelli

sent on 5 Maggio 2025

Pros: Razor-sharp, priced, robust, autofocus

Cons: It doesn't have the particularly nice colors and three-dimensionality of higher-end lenses

Opinion: I used it on Canon 550D, 1D mark IV and R6. My sample is very sharp already from F1.8, in some light conditions it has chromatic aberrations at full aperture that are resolved by closing the aperture by a couple of stops. I found the focus quite fast like all Stm lenses (slower than usm), it is great for portraits in motion or for fairly fast sports such as basketball. The accuracy of the AF depends a lot on the camera, but even on the 550D on the central point it was very precise. I find the colors similar to those of the 18-55 Stm, the greens are very saturated and there are fewer shades of colors than the higher-end lenses. F1.8 allows you to have a lot of blur and it is a beautiful blur as you can also see on the portraits that are here on Juza. After this lens I switched to the Leica Summicron R 50mm which costs much more and I found a sharp lens the same but with more beautiful colors, more three-dimensional and with an even more beautiful blur. For 100€ among the autofocus lenses I think that the Canon 50mm 1.8 stm is the best choice to have a very sharp lens that can be used in low light and that has a very good blur.

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