I tried everything, including a wireless remote. From what it seemed, the tripod foot on the lens was quite narrow for such a lens. I think the FP shutter was still causing vibrations. I tried quite a few things. Believe me, I tried hard as, like Bill, I was trying to avoid the Tech Cam money pit
One of the the things I did when I had an extremely anal day, was to get a laser pointer - secure it in the hot shot, mount everything on the tripod - do MU with 7 sec delay. Aim the camera at a white wall - about 30 - 40 feet. Trigger the shutter, and then walk to the wall and watch to see it the laser dot moves, when the shutter moves.
I think this gives a pretty good qualitative idea if there is a vibration, Then you can go to the next stage of trying to isolate it and remedy the problem.
Also for example on my 300, (which has a lens foot) I still clamp the camera, I think the Digital back is heaver than the lens, at least more mass.
I remember Jack, did a study on some lenses that has certain shutter speeds to avoid, interesting because it was not - speeds below a certain speed, but something like 1/15 was bad, yet 1/4 and 1/60 were fine for 300mm.
I know for me - I find a world of difference when shooting the DF on a monopod. Which by the way once you develop techniques is really not a big deal, I am talking shooting on the street. You get good and fast- I use a hand strap on the camera, the Gitzo 5 series monopod , RRS tripod head, Gitzo fat foot, and the smart flex plate. I should also mention - when I have time (not trying to catch a fleeting moment) I will use MU on the monopod - The key is technique and practice - practice.
The Tech is a different type of shooting, don't avoid it, if you already have a DB, get one lens (a 40 is my favorite) and a board (Camera) used, you will love it. Look on this forum on the FS / WTB posts, or call Capture Integration (that's what I did)
Thanks
Phil
PPS Since this is Dantes Inferno, after the tech you can get an Arca Swiss F line :watch: