Just thought I'd share this pretty fun and cheap way to do some macro. It's definitely a little finicky and not for insects or anything that moves quickly! But I got "macro bellows" for Christmas from a family member, and I'm pretty impressed with how well it works for $40. I just actually got it yesterday and there's a bit of a learning curve, but here are some of my attempts with it. The shots aren't fantastic, but they do show what this thing can do.
The finicky part about it is that there is no proper camera connection, so you have to set your aperture prior to putting the lens on the bellow, and given that the depth of field is so shallow, it is hard to predict a reasonable aperture for what you're shooting. The candy shot is an example; I thought f/14 would be adequate but it clearly wasn't enough to get a whole single piece of candy in focus at that angle. So if you have to change the ap, you need to take the bellows off, put the lens back on the camera body, change the ap, then remove it and reattach it to the bellows. Also, it requires manual focus, and fully extended it would generally require a tripod since the focal length is so long.
Anyway, just thought I'd share, because it's kind of a fun toy for that price, and if you're interested in macro stuff, a much cheaper "entry" into that type of photography than a $1000 macro lens! Definitely not a replacement for a proper macro lens, but a fun toy nonetheless.