PIER-14 Out of focus frames

Hi Steve, 

Just looked at job 1692 for wr132. Might I suggest that you too have a look at that job when you get the chance.

From looking at those subs it doesn't appear to be a problem of gradually losing focus over time with tube shrinkage, more a case of the focusing failing. All the blue subs are out of focus so it's not the case that focus slipped during the exposures, it failed to focus at the start. Green is also a problem, however, to me the red frames looked decent. In the case of the oxygen they started off okay, but at around one hour in and presumably when it refocused, the following subs were out of focus. Just refocusing on a more regular basis would not necessarily cure the problem, but could cause loss of focus upon refocusing to occur more frequently. 

As I said perhaps you could have a look and draw your own conclusions.

Cheers, 

Ray 

mmmmm

Looking into it now but it looks like the 1 hour imaging blocks we reverted to over the Autumn/Winter/Spring period are suffering during the summer intense heat

I think we may have to revert back to 30 minute blocks to allow for the "FSQ" cool down tube shrinkage effect

Leave it with us

Steve