RichardM, PeterK

A few pictures were taken of ETMY in order to see if any dust particles could be spotted prior to Rai's vacuum test.  The pictures were taken from the viewport under the beam tube as this appeared to offer the best view and allow some manner of support for a camera.  A number of shots were taken with a 30 sec exposure.  The illuminator was on for these photos.

Even when zooming in on the images, it is not clear if there are any dust particles present because of the images becoming pixelated.  One of the images shows a black spot near the centre of the optic but I think this is an artifact of using a smaller aperture.