Quote Originally Posted by johnielvis View Post
if you want it for 4x5 or 5x7 then you may just want to get a real telephoto--say a 360 telexenar or telearton which are also cheaper and give you much less bellows draw and resulting blur danger from swaying--and they're both f5.6--so 2 stops brighter.
Definitely, I recently got my Tele-Arton 360/5.5 for some 150 Euro ($200) in a working shutter.