On mine it is not, double spike on mine is "in focus", if I dont have them then I notice I am out of focus.
http://www.iceinspace.com.au/forum/a...se.php?a=87453
Again, like Adam, it is only on really bright stars. You will notice in the attached link that one spike on each side is stronger than the other and the diagonally adjacent spike is weaker than the stronger one
Double parallel spikes like a # are of course out of focus.
Here is an exaggeration of what I mean. It means my spider is slightly out of shape ....... and something I should work on
.