To buttress the going wide post, I'm interested in a telephoto design for my 5x7 Chamonix. I've never used the T type lenses. Are there any that you can particularly recommend? I have a 300mm 5.6 Caltar, so preferably a good bit longer that that. I've sort of gravitated to tele lenses lately for my landscape stuff. It's just so much easier to make a simplified composition without all that pesky foreground.