Reviews and Problems with Sigma 20mm F1.8 EX DG ASPHERICAL RF
Showing 1-10 of 15
Not Top Notch, but Priced Well
8 January 2015
Summary: If I could, I'd rate it at 3.5/5 stars - but don't personally believe it's quite a 4/5. I got this lens because I wanted an ultrawide on full frame. Here's where it performs best: low light shots, video, af speed, depth of field.
Nice lens, disappointed that it isn't weather sealed
Marlin Beckfield "beckfield", Amazon
31 January 2014
Summary: This appears to be a very nice lens, but I'm a little disappointed to learn that it is not weather sealed. I purchased this lens specifically for photographing Northern Lights, so I'll have to take care when bringing this lens indoors from the cold.
Summary: I bought this lens strictly for shooting stars. Good (not great) value for the money. There aren't many wide lenses out there this fast. It works well for stars. I'm able to get 2 more stops of shutter speed compared to my f/2.8 lenses. A big plus in my opinion.
Great for price and allows for interesting effects
Scott W. Larson, Amazon
17 March 2013
Summary: I don't do much wide angle photography but I've had this lens for years and took it on a hike last summer with a Canon 5D Mark II. It has good center sharpness but even at f10 the corners are somewhat smeary. This is perfectly acceptable for a 20mm lens at this price.
Excerpt: I bought this lens, amongst other Sigma primes, for use on a Panasonic AF 102 4/3rds camera. The product reviews I had read about this lens complained of softness, aboration, and vignetting at the edges, but all the testing reports were performed with a full frame stills camera, and I thought the...
Pros: Manual Iris ring, No barrel movement, Well built
Excerpt: I bought this lens for a couple of very specific applications: to get landscape pictures at night without star trails and for some dramatic close-ups. It makes these well, but not spectacular.
Pros: Durable, Lightweight, Rugged, Strong Construction
Cons: Chromatic aberration, Not sharp for close focus
Summary: My copy of this lens gives good image quality, though it does have slight barrel distortion (things near the edge of the field of view bulge out very slightly). This is typical for this wide of a lens, and isn't noticeable unless viewing something with lots of straight lines near and parallel to the...
Summary: I bought this for use on my D3. It works pretty much as the reviews say (elsewhere). at f1.8 you do get a lot of vignetting but at f4 and higher its not a problem. Its all fixed very well with the lens profiles on Lightroom 3. Its sharp. I reckon just about as good as my Nikon 24-70.
Excerpt: Hankin tämän lasin aikoinaan jo filmirunkoon ja olin silloin ihan tyytyväinen sen kuvalaatuun, kun vain muisti himmentää edes f4:ään. Piirto oli hyvää jopa reunoilla. Siirtyminen croppikennoiseen digiin paljasti ettei piirto tahtonut enää riittää, vasta aukoilla 8-11 kuvien terävyys oli oikein hyvää...
Pros: + Tukeva rakenne., + Lyhyt tarkennusetäisyys., + Suuri valovoima helpottaa käsitarkennusta hämärässä.
Günstige Alternative - wenn man ein gutes Korrekturprogramm besitzt
18 November 2013
Summary: Ich hab's für Architekturaufnahmen gebraucht und bin erst ein bisschen enttäuscht gewesen. LR4 und auch PS 6 haben erst keine Objektivkorrekturprofile im Netz gefunden, so dass ich manuell korrigieren mußte - Was für 'ne besch*** Verzeichnung.