Speaking about the 60th chamber, I would like to say that it was released to close the hole between the initial class and the semi-professional. The body has been simplified to make the camera understandable to the average user. Speaking frankly, 60d is the same 550th, the only difference is only in the case and a larger working iso. This is probably something in between for those who do not want to take a simple DSLR with a minimum of buttons, but are not ready for something serious (7d, 5d). I have a Sony a330 camera myself, but after the new year I’m going to switch to this camera, since Sony can’t offer anything like that yet.
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