If you're happy with your present lens then why change?
These articles will help you with your outdoor portraits:
http://www.shutterbug.com
Type 'get it right' (May 2008) and then 'improve your outdoor portraits' (May 2005) in the Search box. Both written by Steve Bedell. Pay especial attention to "Get It Right ..." since its about a model shoot at the beach in the late afternoon. What he has to say about setting your white balance might surprise you.
The Oct. 2009 issue of SHUTTERBUG is devoted to light and lighting equipment. You should get sufficient information from the articles and equipment reviews to decide what you need.
These articles will help you with your outdoor portraits:
http://www.shutterbug.com
Type 'get it right' (May 2008) and then 'improve your outdoor portraits' (May 2005) in the Search box. Both written by Steve Bedell. Pay especial attention to "Get It Right ..." since its about a model shoot at the beach in the late afternoon. What he has to say about setting your white balance might surprise you.
The Oct. 2009 issue of SHUTTERBUG is devoted to light and lighting equipment. You should get sufficient information from the articles and equipment reviews to decide what you need.