I really enjoyed shooting with the Nikon 14-24mm AF-S f/2.8G ED lens which was released as part of Nikon’s foray into full-frame cameras along with the D3. It takes incredible images and was a pleasure to use. But for most of us it has several drawbacks which make it a difficult acquisition. First is price. At $1800 for the US version it is a large investment for a lens that typically gets used a lot less than a mid-range zoom. Second, it is large and heavy. If you lug your gear with you the 2.2 lb. weight and 4”x5” size create quite an impact on your photo pack. Finally the “domed” front makes it difficult and expensive to use filters with it (an expensive add-on adapter is needed).

Grand Prismatic, Midway Geyser Basin, Yellowstone National Park
Nikon D700, Sigma 12-24mm Lens at 12mm, f/22@1/250s, ISO 800
Going ultra-wide is the only way to get the full scene, as the moving steam rules out a pano

Even more important to excellent bird photography than having the right camera is having the right lens. There is no point in purchasing that dream camera body and crippling yourself with a cheap lens. In the 8 years I've been leading digital photo safaris I've had the chance to use or at least see used just about every likely lens made for Nikon and Canon camera bodies and have plenty of hopefully useful thoughts to share with you:

We just finished another successful Texas Bird Photo Safari. I'll be writing more later in the week but since so many of you are curious about the Sigma 120-400mm Telephoto Zoom lens I wanted to let you know that it was a complete success.