macro ring question

[Youstolemyname]

I am interested in adding macro capabilities to my lenses. I really want to shoot close up shots of insects and other random objects.

However, I don't have the budget for a new macro specific lens. I am therefore looking at macro rings but do not have the foggiest where to start.

I currently own:

A nifty fifty
A 55-250 IS
A sigma 10-20

Which lens would be best suited to macro work and are there any rings, or other solutions, that people would recommend?

Thanks in advance

 

[Youstolemyname]

Im looking for 1:1 magnification if possible and it seems that the cheap tubes on the bay wont cut the mustard with no appature control, leaving my lens locked at the lowest f-stop of 1.8

Only alternative is a screw in filter type one I guess. Anyone used these?

 

[Youstolemyname]

looks a good plan