Sigma 18-50mm f/2.8 DC DN : Specifications and Opinions

The Sigma 18-50mm f/2.8 DC DN is a standard lens for APS-C, manufactured from 2021. The focus is done by Stepper Motor, it does not have image stabilization. The average price, when it has been added to the JuzaPhoto database, is 549 €;

20 users have given it an average vote of 9.4 out of 10.

MOUNT

This lens is available with the following mounts:

Canon RF: this lens is compatible with mirrorless APS-C Canon RF.

Sony E: this lens is compatible with mirrorless APS-C Sony.

L-Mount: this lens is compatible with mirrorless APS-C L-Mount.

Fujifilm X-mount: this lens is compatible with mirrorless APS-C Fuji.

Specifications
Focal lenght	18-50 mm
Angle of view	76.3 - 31.6° (equivalent to a 27-75mm in Fullframe 24x36mm format)
Format	APS-C
Max. aperture	f/2.8
Aperture blades	7
Lenses/Groups	13 elements in 10 groups
Min. focus distance	0.12 meters
Reproduction ratio	0.35x
Features
Zoom type	Ring, external
Stabilization	No
Focus	Stepper Motor
Internal Focus	Yes
Built and notes
Tripod ring	No
Extenders	No
Filters	55 mm
Lens hood	Yes, supplied
Weather sealing	Yes
Weight	290 g
Dimensions	65 x 74 mm
Buy
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Reviews

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The following opinions have been automatically translated with Google Translate.

Giampaolo Masserano

sent on 02 Ottobre 2025

Pros: Build quality, compactness, f2.8 from 18 to 50, sharpness.

Cons: All defects are corrected in-room

Opinion: The lens is very small but, weighing it, you realize that you are in front of a really well built object (miles away from the various 18-55 Canon that seem empty so light and plasticky ...). Properly sliding rings and patience if the diaphragm ring is missing, which I adjust with the wheel on the body. Ideal marriage with my Sony A6700: a mix of unparalleled quality and robustness, to put in my backpack on every mountain outing without having space problems. It is amazing that Sony itself does not produce a similar lens, forcing you to mount much more voluminous lenses (which nullify the compactness of the camera bodies) or throw yourself on the poor (according to many) E 16-50. Those who talk about aberrations, vignetting or distortion at 18mm may forget that nowadays all cameras are equipped with very effective corrective automatisms in the menu: so why complain? The same goes for the lack of stabilization: the one on the sensor is enough to get very sharp photos since the balance is excellent ... and 75mm equivalents I don't think create major vibration problems.

Giobanni

sent on 04 Aprile 2025

Pros: Lightweight, compact, eye-catching, crisp satisfying

Cons: chromatic aberrations sometimes evident

Opinion: Kept for a few months but after finding that the chromatic aberrations, in some cases a little more extreme, jumped out at the eye (green and red on the blurred keys of the PC keyboard for example) I replaced it. I also got the cash back discount even if late to the 2 months declared but in the end I preferred the 28-60 of sony for my street. For 500 euros I expected more than a little more brightness which you are forced to give up using at least an f4 to avoid the defect

Nouhanda

sent on 21 Marzo 2025

Pros: Very light and compact, smooth dials, image quality

Cons: Chromatic aberrations

Opinion: I analyzed at length whether to take the Fuji 16-55 mk1, the Fuji 16-50 or the Sigma. Embracing the philosophy of portability, I excluded the Fuji 16 55 mk1 for its weight and size, I don't consider the mk2 because it is too expensive, while I preferred it to the Fuji 16 50 because of the constant aperture. If you are also wondering which one to get, consider this: if you don't necessarily care about having Fuji lenses, if chromatic aberrations are a negligible defect and if you can tolerate the absence of the aperture ring, go easy on the Sigma. The portability is exceptional combined with the XS10 and the quality is more than good.

user207727

sent on 23 Ottobre 2024

Pros: Excellent lens (see features)

Cons: none (see features)

Opinion: That it's compact, lightweight, constant f2.8, tropicalized, no aperture ring and no stabilization can be seen from the lens specs, so these above can't be considered either pro or con. These are things that you know before you buy the lens. For the use I make of it, on Sony, I didn't have any surprises: the lens seems very good to me, it responds perfectly to the advanced AF of the 6700 and a little vignette, which for me is not a big problem but it is certainly noticeable. I don't express myself on sharpness because I am not able to evaluate it but it seems to me that it is ok, as well as on the rendering of colors which seems to me all in all neutral. A true all-rounder, compact, lightweight, f2.8, quality, at a fair price, which restores justice to the APSC system.

Wilier86

sent on 16 Ottobre 2024

Pros: Small size, f/2.8 throughout focal length, price, sharpness, portability

Cons: Non-premium materials, lack of aperture selector.

Opinion: Bought to complement the Fuji XT5. I was looking for an optic with constant f/2.8, in the end I was undecided between three, Fuji f.2.8, in Tamron and Fuji. In the end my choice fell on him for the sharpness factor, size and cost. The Tamron has a longer focal length but weighs twice as much and also in size it is much longer so I discarded it. The Sigma qualitatively has more valuable materials but it also weighs a lot and costs twice as much as the sigma and then Fufji announced the new II version which apparently decreases in size but should cost around 1600 euros (too expensive). Let's go to the Sigma, I recommend it to those who need a light optic, it is of excellent quality, it has a scary sharpness almost as much as the Fuji at half the weight, size and cost. it is an excellent lens to always carry with you, it fits in a pocket, really small, I still wonder how Sigma managed to make such an optical at constant f2.8 with these dimensions. the only negative drawback, the materials a bit plastic, but guys at this price and with this quality in such a small size you can accept, another factor that is missing is the aperture selector, but I don't see it as a very negative influential factor because you can select them with the wheel in the dedicated camera body, so nothing special. In conclusion, I highly recommend it for those who travel, or do street or reportage and need a constant focal length range from 18 to 50 2.8 with an excellent quality of sharpness rendering in very small dimensions and a ridiculous very light weight.

There are 7 more reviews. Show all »

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Sigma 18-50mm f/2.8 DC DN : Specifications and Opinions

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Photos taken with Sigma 18-50mm f/2.8 DC DN