Thanks, I'll check that article out.
Fwiw, the TS-E lenses do work with teleconverters (unofficially), but EXIF data is screwed up I think.
Anyhow, I've settled on renting 45mm and 90mm TS-E lenses for my 5D Mark III and keeping my view camera and two lenses (135mm and 210mm) and shooting mostly 6x12 with it (Velvia is still available in 120 and more affordable than Velvia 100 for 4x5). I'm not shooting very well with digital for whatever reason (just poor compositions) and 6x12 is a nice format.
My view camera work still suffers from technical issues. Occasionally I won't get everything in deep focus (hard to know where to place focus and how far to stop down) and sometimes my exposures are way off. Anyone have any advice on fail proof techniques? For very simple shots (infinity focus and minor swing and rise) should I even worry about exposing longer to compensate for lens movements? Is it worth checking exposure on a dSLR, and if so, how fast would you rate the dSLR? I rate Velvia at 40 ISO recently but still get the occasional underexposure. I usually rate highlights so they're no brighter than 1.5 stops over and shadows so they're no darker than 1 stop under with a spot meter, but usually that leads to me overexposing way beyond what my incident meter suggests, but the scene is still a little dark. Maybe I just shoot dark scenes.
Anyone recommend any good cheap drop cloths? I'm using the hood of an old jacket atm.