Lens Reviews

Being in general a wide to moderate tele-zoom kind of guy, I have found myself occasionally frustrated by lacking a long zoom or tele prime when shooting in the great outdoors. There are some scenes and places that cry out for a longer focal length, and it’s not from laziness but more accessibility that creates the need.

Beauty is as beauty does. A Leica M with a 50mm APO Summicron attached is the iconic archetype of modern digital cameras with retro design. Using it is a prodigious experience comparable to, let’s say, playing a concert Steinway grand piano, or maybe setting the hands on a Patek Philippe timepiece. I’m only guessing here, ‘cause I’ve done neither. But I did use a Leica M and 50mm APO Summicron for a week. Did they perform? Read on…

Considering that this opticis only a tad slower than the Nikkor 200-400mm f/4, with a drop of a stop when you zoom out, has a 5x zoom range, is lighter, and costs about half of the near $7000 price tag of the 200-400mm f/4, it is certainly worthy of consideration for those who can appreciate what it has to offer in both range and versatility.

Sigma’s 18-35mm f/1.8 DC HSM is part of their DC series of lenses designed for APS-C-sized sensors so the imaging circle is matched to the size of the sensor. For this assignment, I used a Canon EOS 60D with a 22.3x14.9mm sensor, producing an equivalent angle of view of a 28-56mm lens. Shooters of Nikon, Pentax, Sigma, and Sony cameras, the other mounts for which the lens is available, will achieve an angle of view equivalent to 27-52mm. Unlike other lens manufacturers, Sigma priced the different mounts the same ($799) so don’t feel you’re going to be paying a premium for your camera choice. Bucking a trend with camera manufacturers’ lenses, the Sigma 18-35mm f/1.8 DC HSM includes a lens hood at no extra charge.

A tilt-shift lens can be thought of as a flexible visual tool in the many ways it allows you to image the world. Unlike a standard lens, even a zoom, with a set point of view enforced by stance, elevation, focal length, and, within certain limits, depth of field, the tilt-shift lens opens visual doors a “fixed” lens will not. By tilting the lens within the mount you can enhance or greatly diminish depth of field beyond the “normal” abilities of the focal length and aperture setting. By shifting the lens you can “fix” perspective distortion or exaggerate it for “trick” effects.

The 70-200mm focal length has been the standard tele-zoom choice for many years, offering near normal to a good tele range that suits many practical purposes. Yet, quite a few stock-in-trade 70-200mm lenses had been slow or lost significant aperture as soon as you left the shortest zoom setting, making them a real challenge for handheld, low-light, or even max focal length shooting. Certainly, improvements in sensors and processors in terms of the high ISO/image quality ratio have helped. If you’re too slow on shutter speed with a variable aperture zoom you can always jack up the sensitivity. But that’s not always a great choice and it seems to force you to compromise image quality just to make up for the lens losing “speed” just when you need it most.