WHICH MACRO IS BEST FOR YOU?
Macro lenses come in a number of focal lengths and it's important to understand how this can affect your photography. Shorter focal lengths like 50mm or 60mm are usually the most affordable and are good general- purpose macro lenses. Their working distance – in other words the distance between the lens and your subject – is shorter than with macros of longer focal lengths, meaning it's more likely to obscure light from the scene and, when shooting miniature wildlife, you run more of a risk of scaring them off.
Longer focal lengths, like 90mm and 105mm, have larger working distances so reduce the risk of these problems. They are larger, but still handle nicely and generally tend to be a little more expensive. There are also macro lenses boasting 150mm, 180mm and 200mm focal lengths, which offer the ultimate in close- up optics for nature photographers, but these are much heavier and far more expensive.
You may also come across some oddities too: Canon offers the MP- E 65mm f/ 2.8 – a manual focus lens that offers magnifications from one to five times life- size, as well as the recently- introduced EF 35mm f/ 2.8 macro, boasting an LED ringlight around its front rim.