Re: [ATM] TDE on a 6f6 mirror

[Mike Lockwood <melockwo@uiuc.edu>]

Hi,

Dale Eason wrote:
> There is the possibility that the camea lens is
> vignetting the right side of returning light cone. 
> That happens a lot with small cameras with zoom
> lenses. It can also happen if the camera lens is not
> close enough to the knife.

Good point.

> To know for sure back the knife out of the image and
> then take a picture.  If the mirror is not fully
> illuminated then that is indeed the case.  If the
> mirror is completly lit then then edge is turned.

Let me add to that - IF the mirror is completely lit then you have a 
rolled outer ZONE, as well as TDE.  You also have some astigmatism 
because the shadows are not symmetric, and/or possibly roughness or 
turbulent air in the testing room.

Let's hope that the mirror was not fully lit and the next set of 
photos is better.

I like the blue color.  :)

	Mike Lockwood

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