I am told that the remarkable focusing mechanism on the Arca Rm3d will allow standardizing the focus at discreet distances according to the published tables that Arca provides with each lens they mount. A laser distometer is used for measuring distance. I'm putting a lot of faith in Arca's engineering and the opinions of other Arca owners and dealers (my milage usually varies). I will post results when I have the camera and lenses in hand. (? estimated 6-8 wks)
+1
With careful handling of your gear (long tele lenses should be wrapped carefully when placed in your bag to avoid torquing pressure on the end element) and careful controlled testing beforehand (e.g. finding the offset for your back is 2.4 focus points) you can repeat very accurate focus with an RM3Di using the setup he describes.
Doug Peterson
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