Hi I am currently using the 100 mm l f2.8 on a 7d but I'm abit confused with telecovertor and extension tubes, I want to increase magnifications to 2:1 2x lifesize so what should I buy in order to achieve that?
Teleconverters gives you magnification by "extending your focal length" and also increase your working distance.
Extension tubes and bellows gives you the ability to focus closer, so your camera/lens can get physically closer to the subject, thereby giving you greater magnification by letting you get closer.
Some macro folks use both at the same time.
howdy! since that other members answered your questions already. I just want to share my setup for my macro. well im using 5dm2, 100mm f2.8L, kenko 25mm ET and a raynox 250 which gives a good output.for flash im using a small flash for your case use your popup flash and a diy diffuser. pm me for questions.cheers