I wanted to buy a Tokina 124, but I got a slightly used Canon 10-22 with a good discount. I don't regret one bit! The minimum aperture, by the way, is 22 at the wide end and 29 at the long end. And the minimum focusing distance (0.24 m) is apparently considered from the optical center - in practice, you can focus on an object 13-15 cm from the front lens. With such a wide angle in the room, it is sometimes difficult to control the light. and you have to more carefully monitor the verticals and the point of shooting so that furniture or houses do not fall into the frame.
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