What are the differences between these various lenses ?
I'm looking at a used Pentax 400mm A F/5.6 for 549usd. Is this a good buy ? I already have : 50mm F/2 35-80mm F/4-5.6 70-210mm F/3.9 28-105mm F/2.8 - 3.8 I'm looking at the 400mm for nature shots. I dont have an AF body. I'm thinking of getting the 1.4 teleconverter also sometime in the near future. I do have a Vivitar x2 btw. Thanks Chris - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .

