Canon MP-E 65mm 1-5x Macro Lens
The Canon MP-E 65mm Macro Lens is a tremendous macro lens and it is unlike any other Canon lens I have used to date. And I recommend that you read the manual for this lens - it will help you understand its individualities. I should perhaps tell you right up front that the Canon MP-E 65mm Macro Lens is a manual focus lens. This is not a bad thing for a macro-only lens as this is how macro lenses are regularly used anyway.
Turning the focus ring does indeed bring the subject into focus, but this effect zooms in and out on the subject (other lenses do also, but it is very noticeable). You can either set the magnification you want and move closer/farther away to focus (magnification priority), or you can change the magnification by turning the ring until your subject is in focus. Well, it will focus on your subject as long as you are within the Canon MP-E 65mm Macro Lens' tiny focus distance range. Starting at 1x, the MP-E subject is in focus at a little more than a 100mm working distance. By 2x, the working distance drops to 63mm. continuing on a distance curve, the MP-E allows only 41mm of working distance at 5x. You can forget trying to snap a portrait with this lens - unless the portrait is of an insect or something similar. With effective apertures this tiny, a huge amount of light and or a long shutter speed is required for sufficient exposure. Another issue is the handling of the camera at these magnifications. Principally, you will need a very stable tripod and a static subject or you need a flash. The Canon MP-E 65mm Macro Lens also enlightens you to a whole new world of sensor dust. Make sure your sensor is clean or plan to spend lots of time with Photoshop's healing stamp cloning! This Canon MP-E 65mm Macro Lens inspires creativity. I don't recommend this lens for beginner macro photography as it might inspire frustration. With patience however, you can create fabulous images! Then, which macro lens should you pick? Excellent question. Choosing the right focal length depends on the subjects that each photographer wants to shoot with it. Longer focal length macro lenses generally give you more distance-to-subject working space for the same subject framing. Insects will not hang around long at the Canon EF-S 60mm f/2.8 Macro USM Lens' 3.5" or so (9cm) 1:1 minimum working distance (MWD). The Canon EF 100mm f/2.8 Macro lens allows about 6" (15cm) and the Canon EF 180mm f/3.5 L USM lens allows about 9.5" (24cm) of working distance at 1:1 magnification.