Of greater concern is the fact that a lot of this will be over many photographer’s heads. I don’t have the time to spend hours on end trying to refine focus. This isn’t great news for a lens reviewer like myself that has lenses for a limited period of time.
SIGMA 30MM 1.4 CANON REVIEW SOFTWARE
Unfortunately there is no actual calibration component as a part of the software it is trial and error. I started playing with the values only at that distance. I recognized that while the lens was delivering good focus results at closer distances, the medium distance shots were front focusing. I worked at using the USB dock to tweak this value. The Sigma USB dock helps somewhat here as it allows you to tune the lens at that specific distance, but the bigger issue is when the AF system delivers inconsistent results. The medium distance has been the weak point for many of the ART series lenses I’ve tested. Want to watch your review instead? Take a look here for my thorough video review on YouTube: Has Sigma managed to create an extreme yet useful lens here? The answer to that is a little complicated, but there is no question that in many ways Sigma did succeed. Often pushing the boundaries too far produces a very niche product that doesn’t prove overly practical (I’m looking at you, Canon 50mm f/1.0L!).
There’s often a reason why traditions exist. An f/1.4 maximum aperture in a 20mm focal length easily bests what was previously possible (or at least done) and provides a strong alternative to a lens like the Zeiss Distagon 2.8/21mm (I reviewed that lens here).
This newest addition to the ART series, the Sigma 20mm f/1.4 DG HSM ART now pushes the boundaries of how wide an aperture can be successfully engineered into a lens wider than 24mm.
SIGMA 30MM 1.4 CANON REVIEW FULL
They have pioneered innovative zoom lenses with wider apertures than what has been done ( 18-35mm f/1.8 ART and 50-100mm f/1.8 for APS-C 24-35mm f2 for full frame) and have successfully built strong competitors to the traditional 24mm, 35mm, and 50mm f/1.4 lenses. Sigma has emerged from the third party lens manufacturer abyss with a new identity – the company that pushes the boundaries of what can be done with wide apertures.
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