Not applicable to a lens without an aperture ring, I know, but I thought I'd mention the type of tubes to avoid, in my experience, are the very cheap ones that screw together and have just one female lens socket to screw on at one end and one male connector for the other. If/when the threads jam, as mine have, the tubes are so flimsy that they distort when trying to get a good grip on them and simply will not unscrew
Other than that, I've used both contactless tubes and bellows on my cameras, using stop-down manual metering, and find it no real inconvenience ... and significantly cheaper than the asking price for most extension tubes with contacts
However, as the OP already has the lens I'd recommend keeping an eye open for poorly described tubes on eBay. Bargains are there to be had for those who know what they're looking for
Last edited by kypfer; 06-21-2018 at 12:04 AM.
Reason: afterthought