Originally Posted by sirhc_1
I own the EF 100 f2.8. It's a great lens. I also have a Tamron 1.4X TC that works well to add even more reach and magnification. I have used this lens and lens combination on both the 40D and the 5D. It works well.
I am glad that I didn't spend a ton of money for a macro. I dabble, but don't shoot a lot of macro. The EF 100 f2.8 is a really good portrait lens. A little long on the 40D, really nice on the 5D. I shoot macro in manual focus only. When the working distance is down to 6-8 inches all you have to do is rock back and forth slightly to bring the subject into focus. It then becomes a matter of technique. At f11 on the 40D and f16 on the 5D, hand hold shooting with natural light at lower than ISO 800is pretty much impossible. You will want a twin flash or macro ring light setup. I use strobist setups as much as possible.
So, if you think you're going to dabble, I'd highly suggest starting simple and as inexpensively as possible. You can always sell and upgrade if you find yourself shootingmacro a lot.
Here's a couple of samples from last year.
Canon EOS 5D, <span class="nowrap"]f/16 @ <span class="nowrap"]100 mm, <span class="nowrap"]1/200, <span class="nowrap"]ISO 400, <span class="nowrap"]Flash (with home made 6 x 6 diffuser)
Canon EOS 40D, <span class="nowrap"]f/2.8 @ <span class="nowrap"]100 mm, <span class="nowrap"]1/200, <span class="nowrap"]ISO 320
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