I'd like to keep the connection between body and lens so, IF I'll get a tube, it will be with
the electronic communication included, so I will be able to control the aperture and the focus.
* Didn't try the manual focus but maybe in macro it's more applicable than in other cases - ie. for portrait.
This makes me think that an extension tube could be better.
Nice! I will not go that far, into extreme, because I only have a limited budget. But, I will take a look and maybe "steal" some ideas
This was my first thought BUT there is also a drawback to tubes: it's a bit difficult to mount/unmount them. You have to [detach the lens], [detach the tube] and [put lens back]. It's easier to get dust on your sensor, that's why I'm thinking that if i get a filter for my 35mm it will be easier to work with it.
Didn't try but, the aperture must be forced, without any electronic control + you expose inside of your lens to a lot of dust.
Did you understand why did that happen?