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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 €;
9 users have given it an average vote of 8.8 out of 10.


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


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 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 AF   No
 Full Time MF   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
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Reviews



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


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.

avatarsenior
sent on January 18, 2014

Pros: Good build quality from f.9 is perfect to f2.8 is good, even at night

Cons: focus ring is difficult to operate, the rest is a great lens to replace the kit

Opinion: I took this view for two months and I must say it is a good quality lens, I replaced the 18-55 kits, the difference is more accurate af, at f2.8 allows fuzzy good night behaves well, neutral color, it offers a nice yield from f.9 already, I recommend it as a first lens in place of the kit is located at good prices.

avatarjunior
sent on April 24, 2013

Pros: robust, good quality if prepunched (f 8-11), the overall yield acceptable to f2.8.

Cons: distortion "barrel" very obvious focal length 18, is corrected only in PP, there is the possibility to correct the focus manually while in AF, (the ring is locked), AF slow (non-USM).

Opinion: I have this light for 6 years and use it regularly, is solid and robust as Sigma has accustomed us. Good overall performance for sharpness at f2.8 at all focal lengths, even the good macro. Unfortunately, at least my copy, has back focus problems with my 30D, Canon unsolved problem from assistance that does not even come into the lab Canon lenses do not, I'll keep that. Aberration decided to "barrel" to the focal length 18, which decreases as you go up the focal impractical for photos of architecture and interiors, autofocus is not fast and noisy, due to the fact that it is not USM.rnSostanzialmente good alternative to the kit plasticone , at least it was in production until, well as a handyman and reportage, good for portraiture.

user24002
avatarsenior
sent on April 08, 2013

Pros: brightness and sharpness

Cons: front lens against dust too exposed to the impact and scratches

Opinion: goal is a relatively inexpensive but quality ', the images are very sharp at all focal lengths f 2.8 even while there is some reflection in the light, partially solved with the lens hood supplied with the lens front is a bit exposed to shock and scratches therefore recommend a filter uv permanently mounted Great price performance

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

Foto
Looking for the grain
by Vanni T.
23 comments, 4123 views  
HI RES 21.3 MP

Foto
Moved that I take the sun
by Vanni T.
20 comments, 2536 views  
HI RES 24.0 MP

Foto
Want to leave
by Alessandro1124
25 comments, 3095 views
Foto
Among the branches
by Vanni T.
17 comments, 1560 views  
HI RES 24.0 MP

Foto
Yet beneath the river flows
by Alessandro1124
39 comments, 2010 views  
HI RES 3.2 MP

Foto
Evening Alpe di Siusi
by Alessandro1124
19 comments, 4314 views


RCE

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Foto
A second color of fire
by Vanni T.
17 comments, 952 views  
HI RES 24.0 MP

Foto
Macchia plays and jump: D
by Vincenzospoglia
11 comments, 1274 views  
HI RES 12.2 MP

Foto
W The Nature 2
by Bfasuper
12 comments, 1866 views
Foto
The launch
by Paola76
23 comments, 1088 views  
HI RES 12.2 MP

Foto
The river enchanted
by Alessandro1124
27 comments, 1629 views
Foto
Lost in thought
by Vincenzospoglia
3 comments, 2256 views
Foto
The Lodge and the rain
by Maurog74
27 comments, 551 views  
HI RES 3.8 MP

Foto
Untitled Photo
by Alessandro1124
10 comments, 1366 views
Foto
Autumn blaze of color ....
by Vanni T.
11 comments, 899 views  
HI RES 23.4 MP

Foto
Falls the world
by Vanni T.
6 comments, 1069 views  
HI RES 15.1 MP

Foto
Aurora
by Vincenzospoglia
4 comments, 1625 views  
HI RES 12.2 MP

Foto
Sailing in a sea of dunes
by Champlain
5 comments, 344 views
Foto
The plot
by Vanni T.
13 comments, 852 views  
HI RES 24.0 MP

Foto
Granny photographer ...
by Marpe1962
12 comments, 1293 views  
HI RES 8.0 MP

Foto
A moment before ...
by Alessandro1124
12 comments, 1428 views
Foto
Lying on the railing
by Vincenzospoglia
7 comments, 2020 views
Foto
Fuego
by Vanni T.
0 comments, 431 views  
HI RES 24.0 MP

Foto
Isle Of Bitches
by Bfasuper
11 comments, 1176 views
Foto
Endless Pink
by Maurog74
35 comments, 421 views  
HI RES 3.8 MP

Foto
Untitled Photo
by Paola76
9 comments, 1254 views  
HI RES 12.2 MP

Foto
Pola
by Paola76
3 comments, 958 views  
HI RES 12.2 MP

Foto
Roots
by Alessandro1124
7 comments, 981 views
Foto
Waiting for the rain
by Alessandro1124
12 comments, 1102 views
Foto
Gran Paradiso C.Reale
by Massimo Morrocchi
5 comments, 809 views  
HI RES 4.8 MP

Foto
The Blue hour Piazza San Carlo
by Maurog74
20 comments, 264 views  
HI RES 3.8 MP



RCE

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Foto
Mountain reflections
by Maurog74
23 comments, 213 views  
HI RES 3.8 MP

Foto
The walkway
by Paola76
8 comments, 851 views  
HI RES 11.5 MP

Foto
The White dressed in pink
by Alessandro1124
9 comments, 935 views
Foto
Brivio ... the moon and 'a light bulb
by Alessandro1124
11 comments, 1580 views
Foto
Sestri Levante ciappa du lu
by Fabiob72
2 comments, 1204 views  
HI RES 16.0 MP

Foto
The sky above the Val d'Orcia
by Alessandro1124
8 comments, 824 views

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