Hi Romina,
The questions you have ask yourself is
1). How I am going to attach it to the telescope, can the camera's lens be removed and replaced with an adapter that fits into the telescope focuser. ( Probably unlikely)
2). What image format does the camera produce, i.e RAW or Jpeg. If it is only Jpeg which is 8 bit format then processing the image will be frustrating. If it does save in RAW format (12 bit) is this supported by any of the common astronomy stacking and processing software.
I see you have a Canon 1100D, you would be better off getting a T ring adapter for that. It has Live View which makes focusng a lot easier than looking through the viewfinder, and there are lots of astronomy software that supports Canon.
Regards
Bill
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