extension tube question

[MHB]

looking to get an extension tube for my Nikon D3100. are there any that i can change my aperature AND autofocus with?

 

[Overread]

Kenko brand extension tubes in Nikon mount are generally one of the most affordable quality options on the market. Giving you very good build quality along with the metal contacts that let you retain lens control (aperture and auto focus).

That said whilst you'll use the aperture changing ability a lot you might find that its easier to use manual focus instead of auto focus for very close up work done with extension tubes.