16
General / Re: Sony A7rii for photogrammetry and lenses
« on: January 29, 2020, 04:20:53 PM »
Forgot to mention that in addition to the sensor moving freely when the camera is powered of, the lens also moves focus (to infinity I believe). When powered off and then back on the focus moves back to the previous setting, unless the battery is removed then it resets to infinity, but again the precision is unknown. It likely isn't the exact same position and my suspicion is that this creates an even greater error than a shift in sensor position. I would recommend using a fully manual lens and taping the focus ring if possible. If not consider my previous recommendation.