thrumyeye wrote in post #2168802
What is a recommended lens for the 350D that will provide nice, sharp portraits?
Traditionally, photographers have preferred lenses of focal lengths 1.5-3 times the normal focal length for a given format. The idea is that this provides a pleasing perspective on the face. I've used lenses even longer without losing that perspective, but shorter lenses tend to pin the ears back and make the nose a bit more prominent.
It isn't the lens that controls this, of course, but rather the camera position. But the relatively distant camera position that provides a pleasing perspective will force you to crop your images significantly if you use too short a lens.
I use a lens that is at least 1.5 times normal in medium format for group portraits. That's 120mm for a camera whose normal lens is 80mm. My favorite lens for individual portraits and head-and-shoulders compositions is a little over twice the normal focal length, at 180mm.
For the small sensor, this is equivalent to lenses in the 50-85mm range. Thus, for individual portraits where you have some room to work the 85/1.8 is mighty hard to beat without spending real money. And the 50/1.4 is also good in this application, though the background rendering isn't quite as smooth as with the 85. You might even need something as short as 35 for group shots where you can't back up. The 135/2L lens can produce awe-inspiring results, but for the small sensor it will require very long working distances.
In general, for outdoors I'm able to use the 85 routinely, but inside the 50 is a little easier to manage. I think both are worthwhile to own, and both together cost much less than a zoom covering the same range that could approach their resulting speed and image quality.
For longer work outdoors, I have been quite pleased with the 70-200/4L, even though it isn't as fast and won't blur the background as much. At the 180-200 end, though, it will provide plenty of blur for tight head shots and the rendering is actually quite good.
Rick "whose favorite portrait lens is a 180mm Sonnar on medium format" Denney