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While using the 28/1.5, I found it frustrating several times and wasn't overly happily. Both in terms of IQ, but also because it was nearly impossible to acquire focus with either shimmering or magnified view outside the frame center. Maybe better EVF's would largely mitigate this.
With Fred's crops at infinite, the CV 28/2 looked close to the 28/1.5 when both at f2. When I did my shooting tests earlier this thread, placing the focal spot at the intersection of the vertical and horizontal rule of 1/3rds at one meter, the difference was large. I want to know when and where it's safe to place my subjects if shooting at 1.5 or f2. For my kind of shooting, this is important.
Today, at 2 meters, I checked the lenses against each other again at the intersection of 1/3rds. The difference is also large. I guess the plane of focus evens out more after 3 meters. But given a 28mm FL, and from MFD to 2 meters, you're not getting very good performance at the rule of 1/3rd and further out--so midzone to extreme corners--it helps me understand the limitations of the lens, therefore I can get better results and will enjoy the lens more as well. If you look at the 2 meters crops, the focus is on the bird feeder, but on the rest of crop, you can see the FC takes its toll all over. Really, there's a pretty centralized sweet spot I'd want to place my subjects in.
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The CV 28/1.5 has more axial CA when both are shot at f2.
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The CV 28/2 has a bit more bite when shot centrally and both at f2. Not a large difference though.
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I was unable to do a flare resistance test when we got a rare sunny day here. I believe the 28/2 Ultron will show better flare resistance, both in terms of ghosting and flare. If someone else wants to check, that would be great.
The more I shoot the 28/1.5 the more I learn and like it.
