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Sigma AF 18-50mm f/2.8 EX DC Macro : Specifications and Opinions


Sigma AF 18-50mm f/2.8 EX DC Macro

The Sigma AF 18-50mm f/2.8 EX DC Macro is a standard lens for APS-C, manufactured from 2006 to 2010 (discontinued). The focus is done by Lens AF motor (non-ultrasonic), it does not have image stabilization. The average price, when it has been added to the JuzaPhoto database, is 400 €;
12 users have given it an average vote of 8.5 out of 10.


If you have used this item, you can add your vote:  


SpecificationsReviewsCompareBuySample Photos





 Specifications
 Focal lenght   18-50 mm
 Angle of view   77.3 - 32.1°  (equivalent to a 27-75mm in Fullframe 24x36mm format)
 Format   APS-C
 Max. aperture   f/2.8
 Aperture blades   7
 Lenses/Groups   15 elements in 13 groups
 Min. focus distance   0.20 meters
 Reproduction ratio   0.33x

 Features
 Zoom type   Ring, external
 Stabilization   No
 Focus   Lens AF motor (non-ultrasonic)
 Internal Focus   No

 Built and notes
 Tripod ring   No
 Extenders   No
 Filters   72 mm
 Lens hood   Yes, supplied
 Weather sealing   No
 Weight   450 g
 Dimensions   79 x 86 mm

 Buy

Sigma AF 18-50mm f/2.8 EX DC Macro, buy on Ebay Ebay

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Reviews



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avatarjunior
sent on November 19, 2024

Pros: Quite Sharp, constant F2.8 aperture, build quality if compared to kit zooms

Cons: I did not like the colours, AF is not the fastest, no stabilizer

Opinion: I bought it long ago with the intention to replace both a Canon 18-55 IS and a 50 mm F1.8 prime in one lens. Although its sharpness was better than that of the 18-55 mm IS at the same apertures and similar to the 50 mm prime at F4 and above it never became one of my favourite lenses. Colours were to cool and lifeless for my taste, AF was a bit slow and noisy. Other than that it had a nice build quality and gave no reasons to complain. I nevertheless sold it again and kept the prime and 18-55 IS, because the stabilizer was more helpful than one or two stops aperture for static objects and I preferred the character of the prime for shooting people. Today I would probably buy a Tamron 17-50 F2.8 VC to have the best of both worlds (then it was quite expensive).

Google Translate  The following opinions have been automatically translated with Google Translate.


avatarjunior
sent on April 14, 2024

Pros: Cost in Used, Focal Range, Constant 2.8, Weight, Macro

Cons: Construction, sharpness from f/4 down, slow and noisy, sometimes inaccurate autofocus. Unusable in low light.

Opinion: Taken to replace the 18-55 kit on my Canon 70D. For a novice photographer it is a good lens, especially if we consider the fact that you can now find even under 250, which for a standard 2.8 lens for aps-c is a great price. In addition, the size and weight are quite small. The strengths, however, end there. In my opinion, this is not a lens that can be used at a professional level due to the outdated, slow, noisy and inaccurate autofocus, especially in low light. Not very good sharpness below average apertures. The build isn't that of high-end lenses, and it doesn't feel like you're holding a particularly solid lens. The macro function is good and allows you to take home pretty photos.

avatarjunior
sent on February 17, 2024

Pros: Good lens to replace the kit one. Good brightness at all focal lengths Robust construction

Cons: It's a bit poor in backlight, not very precise and noisy focus, barrel distortion especially at the minimum focal length

Opinion: I've owned it for many years now and it still does its job with my dated Canon EOS 50D, which is also very old but for now I wouldn't replace it with the new Canon M system that still doesn't convince me. It is a very good lens both for its brightness at all focal lengths, and for its versatility on almost all occasions. It's sharp and quite defined throughout the frame, although in my opinion it looks much better at medium apertures, especially between f/4.0 and f/8, A f/2.8 has a really nice blur and therefore suitable for portraits. It gave me some problems in backlighting, but not being very fond of this type of photography, it is certainly my fault. Don't expect high performance on the autofocus, as the lens is not ultrasonic, the slow speed and noise are noticeable. The front lens is quite exposed. It must therefore be protected to avoid scratches or worse, better with a rigid lens hood, especially if those like me who do not like to add other glass in front of the lens such as UV filters etc. I recommend it both for the price, and for the fact that when compared to the kit lenses it is definitely the top (even if the kit lenses should not even be compared to certain lenses)

avatarjunior
sent on September 16, 2019

Pros: Construction,Robustness,definition,general yield,constant opening f2.8,blurred pleasant.

Cons: On some occasions, there is little resistance to backlights. Focus a little noisy. Focus that rotates in AF.

Opinion: Optical taken for "two lire" to be mounted on a Pentax K3. I didn't expect much, given the age of the project and knowing the past Sigma reliability. Well... I soon had to think again!! Used on a number of occasions and, really, never let me down. Almost certainly, I was lucky with this specimen,but the sharpness, the definition on the whole frame (even at TA), is really remarkable. The ACs, there are, but they're correctable. An 18mm hair of distortion, but nothing dramatic or unrecoverable. The zoom dial flows smoothly, without hinting. In landscape photos, it behaves well from f4 onwards. In portraits, 2.8 is really SUPERB. Details in large quantities and a really nice detachment of the floors. Generally, in the backlights, it does not create problems (I love to take portraits in the light of sunset), but I happened to take some landscape photos at a sunset and I noticed that in some image, or rather, in some angle, a very bad reflection appears impossible to correct. But given the age of the project and the cost, I think it's more than acceptable to have some compromise. The focus, well... it does not have an AF engine, so its speed and partly its silence, depend on the reflex on which it is used. Pentax, you know, certainly doesn't shine on the AF side, yet it's quite quiet and precise on all occasions. Even the most difficult ones, like a backlight or the like. On average, the percentage of shots lost is 2%. Like the other photographic systems I had previously (Canon,Nikon,Fuji) and used in a very similar way. The construction, it's solid. Robust. The only negative note,is the opaque coating,which personally, I do not like very much; gives me the impression that it "attracts" the dust. But maybe it's just suggestion. The weight, of course, is compared (for example) to a Fuji 18-55 2.8-4. But we're looking at a zoom optics f2.8 FIXED... Many builders don't know how to do much better. I mean, dated optics, sure. But definitely valid to replace the classic kit lens... and make an abysmal leap in quality, because with kit optics, nothing has to be shared (if not focal), as it is much superior. He plays it quietly with more emlasic optics. Honest dimensions; he's fine on a slad. Beautiful to see,fluid ghiere, great sharpness,blurred pleasant.... for that little money it costs, to have absolutely!!

avatarjunior
sent on October 26, 2017

Pros: Brightness, robustness

Cons: Focusing on low light difficulty (coupled with external flash), failure to stabilize

Opinion: I have this lens for more than a year and with the passing of days I'm getting more and more defects. By doing a substantial use with low light the shutter 8 times out of 10 is out of focus. Instead, for optimal light conditions it is also great at maximum aperture and the focus though not being ultrasonic is very accurate. Recommended for those looking for an economical substitute for the base kit.




Photos taken with Sigma AF 18-50mm f/2.8 EX DC Macro

Foto
Looking for the grain
by Vanni T.
26 comments, 5600 views  
HI RES 21.3 MP

Foto
Moved that I take the sun
by Vanni T.
21 comments, 3814 views  
HI RES 24.0 MP

Foto
A chat on the pier
by Maurog74
27 comments, 866 views  
HI RES 18.9 MP

Foto
Want to leave
by Alessandro1124
25 comments, 3851 views
Foto
Among the branches
by Vanni T.
17 comments, 2416 views  
HI RES 24.0 MP

Foto
Yet beneath the river flows
by Alessandro1124
39 comments, 2882 views  
HI RES 3.2 MP

Foto
Ostia Blue Hour
by Claudio Ricci
78 comments, 1635 views  
HI RES 11.7 MP



RCE

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Foto
Macchia plays and jump: D
by Vincenzospoglia
11 comments, 1844 views  
HI RES 12.2 MP

Foto
Evening Alpe di Siusi
by Alessandro1124
19 comments, 5116 views
Foto
Magic moment
by Vanni T.
14 comments, 311 views  
HI RES 24.0 MP

Foto
Red Shadows
by Claudio Ricci
30 comments, 761 views  
HI RES 12.2 MP

Foto
W The Nature 2
by Bfasuper
12 comments, 2390 views
Foto
The launch
by Paola76
23 comments, 1764 views  
HI RES 12.2 MP

Foto
Lost in thought
by Vincenzospoglia
3 comments, 2977 views
Foto
The river enchanted
by Alessandro1124
27 comments, 2383 views
Foto
The Last Journey...
by Andreaf948
11 comments, 450 views  
HI RES 16.4 MP

Foto
The Lodge and the rain
by Maurog74
27 comments, 1473 views  
HI RES 3.8 MP

Foto
Aurora
by Vincenzospoglia
4 comments, 2971 views  
HI RES 12.2 MP

Foto
Untitled Photo
by Alessandro1124
10 comments, 1896 views
Foto
Sunset at Diamante #2
by Andreaf948
18 comments, 557 views  
HI RES 18.0 MP

Foto
Autumn blaze of color ....
by Vanni T.
11 comments, 1505 views  
HI RES 23.4 MP

Foto
The plot
by Vanni T.
13 comments, 1447 views  
HI RES 24.0 MP

Foto
Granny photographer ...
by Marpe1962
12 comments, 1911 views  
HI RES 8.0 MP

Foto
Falls the world
by Vanni T.
6 comments, 1699 views  
HI RES 15.1 MP

Foto
Mountain reflections
by Maurog74
27 comments, 1022 views  
HI RES 3.8 MP

Foto
Lying on the railing
by Vincenzospoglia
7 comments, 2651 views
Foto
Sailing in a sea of dunes
by Champlain
5 comments, 997 views
Foto
A moment before ...
by Alessandro1124
12 comments, 1892 views
Foto
Isle Of Bitches
by Bfasuper
11 comments, 1660 views
Foto
Endless Pink
by Maurog74
35 comments, 1101 views  
HI RES 3.8 MP

Foto
Roots
by Alessandro1124
7 comments, 1351 views
Foto
Untitled Photo
by Paola76
9 comments, 1833 views  
HI RES 12.2 MP



RCE

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Foto
Pola
by Paola76
3 comments, 1483 views  
HI RES 12.2 MP

Foto
The Blue hour Piazza San Carlo
by Maurog74
20 comments, 809 views  
HI RES 3.8 MP

Foto
Fiuzzi Tower and Dino Island at sunset.
by Andreaf948
7 comments, 266 views  
HI RES 17.0 MP

Foto
Waiting for the rain
by Alessandro1124
12 comments, 1580 views
Foto
1000 miles 2019
by Maurog74
4 comments, 611 views  
HI RES 3.8 MP


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