I think they're great. You get a lot closer to your subject.
They are for macro shots. But you have to get close to your subject.
For my uses, I only use one tube at a time.
For 50$, it's worth getting the tubes.
They do have their limitations though:
- Gotta get super close to your subject if using the kit lens.
- Auto focus is useless so you should be manual focusing.
If you're coming through the San Mateo area feel free to stop by and check out my extension tubes.