I want to highlight another contribution by Marc Lacoste, of Nantes, FR. Marc has pointed out a number of very significant items of interest to readers of this blog. His comment on the last post that referrers to the wide-angle lens tests on www.16-9.net . These tests are a real gem! Very detailed and complete. A valuable resource for real estate photographers purchasing a wide-angle lens. I think Marc has referred to these tests before but I didn't pick up on the significance of the site. I've added this link to the right sidebar. Thanks again Marc.