The Carl Zeiss Makro-Planar T* 2/100 ($1,843 list) is a fast telephoto lens with macro focusing ability, available for Nikon and Canon cameras. It's expensive, but fans of manual focus optics will be very happy with the lens. Its focusing action is as smooth as butter, and the metal construction gives the lens the feeling of a precision instrument. The lens is available for Nikon and Canon mounts?the former features a physical aperture ring, but the latter omits it as all Canon EOS bodies support electronic aperture control. It's pretty compact given its speed and focal length. It measures 4.5 by 3 inches (HD), but is quite heavy for its size at 1.5 pounds. The lens is compatible with 67mm screw-in filters.
Most 100mm macro lenses only open to f/2.8, but this one opens up all the way to f/2?which captures twice as much light. According to Imatest the lens already hits 1,976 lines per picture height of sharpness at its widest aperture?better than the 1,800 lines required for a sharp photo. It tops 2,000 lines at f/2.8, 2,200 at f/4, 2,400 at f/5.6, and 2,500 at f/8. As you'd expect from a macro lens, distortion is virtually nonexistent. All of the tests were performed using the full-frame Canon EOS-1Ds Mark III?.
The lens can focus as close on objects as close as 0.44 meters from its front element, which produces a 1:2 magnfication ratio. When photographing an object at the closest focusing distance, its projection onto the camera's image sensor will be exactly half of its real-life size. You'll be able to capture more detail with a macro lens that supports 1:1 magnification, like the Sigma 150mm F2.8 EX DG OS HSM APO Macro ?lens.
Even though it doesn't offer 1:1 magnification, there aren't any lenses that will beat the Carl Zeiss Makro-Planar T* 2/100 in terms of aperture speed. Manual focus can be a challenge with modern D-SLRs, but Canon and Nikon both offer swappable screens for several of their full-frame D-SLRs that will make it easier, and aftermarket vendors like KatzEye produce screens for cameras for which OEM solutions are not available. Of course, Live View is also available for critical manual focus. If you're the type of shooter that prefers to take control of focus you'll be very happy with this lens?the optics and handling are both top-notch. But if you're more of an autofocus person, this one's not for you.
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