Excerpt from Scott Kelby's Digital Photography book, Chapter 3, The Truth About Lenses—When Should You Use a Tilt-Shift Lens?
Now that is a specialty lens! This lens is used mainly for architectural photography. Because you can shift part of the lens, it prevents buildings from appearing distorted toward the top.
Dedicated architectural photographers swear by it, and without that lens many of them would not even attempt to photograph buildings. Like any specialty lens, these lenses are not inexpensive, of course.
Make Sure the Filter Fits the Lens
When you buy a filter make sure you get one that fits your lens. Some lenses have a larger diameter than others, so check that the filter has the same diameter (in millimeters) as the lens you will use it on. For example, for my 18-200mm lens I use a 72mm filter, but my 70-200mm lens accepts only a 77 mm filter.
Want a quick way to find the right size? Go to the B&H Photo website (www.bhphotovideo.com), look up your lens, and a list of filter accessories will automatically appear below it. The site shows only the size suitable for that lens. If you have a filter you want to use on a slightly larger or smaller lens, adapters are sometimes available to make the two fit together. They work just fine.
Read more in Scott Kelby's Digital Photography book.
