Does what it should. Beautiful design. Focusing is more difficult than 24mm and image quality can be less clear. There will be some distortion near the corners (walls/ceiling/lights etc) but 17 is 17 so you're done. Construction of the highest quality. Mine fell off (scratched the steel case) and it still works great. I usually use my 24mm when I can, but in a pinch this thing is perfect.
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