I've been seriously considering getting a flash bracket also, and have researched a few options and really like the Newton design. But, I have 2 concerns I'd like some feedback on from users..(I use: 580 EX & 580 EXII on 20D & 40D with Canon L IS 70-200mmf2.8, Canon L IS 24-105mm f4, Sigma 17-35mm EXDG and Sigma 12-24mm EXDG):
1; When using Newton brackets and supporting the lens with your left hand, how much clearance is there for your fingers/ can you operate the zoom comfortably (esp on wider lenses)? To my mind, it does look a bit tight,esp if wearing gloves, and I think I'd prefer an extra inch in each direction!?!
2; When the camera is oriented for portrait format shooting and the flash is rotated to sit above the lens, the flash (to my mind) isn't going to give the 'appropriate' spread of light, ie. the long side of it's rectangular reflector is at 90 degrees to the camera sensors rectangle. Does this not result in noticable light fall-off at the top and bottom of images (esp. with wider lenses) in portrait format? if it does, at approx what focal length does this begin to become noticable?!?
Flash Bang, What a Picture! What a Picture! What a Photograph!?! (Tommy Steele)