optics-sept-8

A focus sweep with the SBIG camera. The focus number was read off of the dial gauge and appears to be

4mm positive relative to the PreCam focus values. The large scale donut shape changed very, and there

was no change to the astigmatism and in focus donuts.

"focus setting" is defined as 10,000 - dial. Dial is the dial indicator of focus on the tip-tilt box.

We concur with the label: remove the secondary