Total noobie to 'proper' photography so apologies for my first question. Recently bought a EOS 350D from the market place and although I am still in learning mode I am really impressed with the picture quality compared to my usual compact cameras used to date. Not unexpected obviously. i am now looking to purchase a zoom lens and have spotted this http://www.simplyelectronics.net/mainproduct.php?pid=14624&sd=specs but am concerned about compatibility with my camera. Is there some easy way of confirming which lenses are compatible without having to ask a question before I buy or not?