Arca Swiss Field Rise/Fall Zero point

[magicord]

<p>I have an Arca Field with metric orbix and 141 rear standard. I understand that the orbix tilts the front along the mid point of the lens if the front standard is at the zero rise/fall point. But where is this zero point? My rise/fall scale doesn't show the zero point and there is not a detent.<br>

Could anyone help?</p>

<p>Thanks.</p>

[john tonai]

<p>Try contacting Rod Kuklas. He's THE source for Arca information</p>

[sheldonnalos]

<p>I always used the point at which the front standard centered up with the rear ground glass when the rear was all the way down. I think it was the fourth hash mark on the front standard.</p>