As far as Canon lenses go, the 50mm f/1.8 is probably the cheapest, smallest and lightest (130gr) lens in the Canon range. However, that doesn't mean it's not worth looking at!

It's a prime lens (ie, fixed focal length lens), with a maximum aperture of f/1.8. This makes it a great lens for low light situations, due to the large amount of light it'll let in at its maximum aperture.

This large aperture also provides a very short depth-of-field, which is great for portraits, allowing you to have the subject in focus, but the background blurred.



Here's some photos of the Canon EF 50mm f/1.8 II lens.

side view

front view

I've always believed that glass (ie, camera lenses) is more important than the camera body. When I bought my first DSLR, a Canon 350D, rather than buy the Canon EF-S 18-55mm f/3.5-5.6 II kit lens, I opted for the more expensive Canon EF-S 17-85mm f/4-5.6 IS lens. I didn't see the point in putting a ~AUD$150 lens onto a ~AUD$1000 body!

Bill Wadman recently wrote about this in a blog post titled Glass (part one). He introduces the subject by saying: Bill also goes on to discuss the benefits of prime lenses instead of zoom lenses.

Read Bill's article to see what else he has to say about choosing lenses.