Impression of 1650S
I bought this lens last month on ebay, and brought it with me during a 11 day trip. Actually I took 12-24, 1650s and 85mm with me, and it seems I used 1650s the most. The sharpness is acceptable (at least to me), even though it is easy to see that the corner is some kinds of soft at 16mm wide open. At 16mm, it suffers serious distortion. I don't know how to measure the exact percentage of distortion, but I think probably it is higher than 3.x%, a little bit disappointed at this....The OIS is effective, but I don't know if it is better than other samsung lens, as all my other samsung lens don't have OIS.
The build quality is very good, I think maybe even better than my 85mm. This lens does not has a real distance scale like 85mm, but the scale will display on the screen of the camera. The AF speed is very fast, one of the fastest samsung lens.
About the max aperture:
I remember I took some pictures to compare between this lens and 30mm&12-24mm, but unfortunately, I can't find them any longer when I return from the trip. So just post several photos from the trip instead.;-)
Camera NX300Focal Length 18mmAperture f/2Exposure 1/2000sISO 100
Camera NX300Focal Length 22mmAperture f/5.6Exposure 1/500sISO 100
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