From: "Jean-Guy Moreau" 
To: "Jon Bishop" , "'ATM
'" 
Reply-To: "Jean-Guy Moreau" 


Hello Jon, my light setup is a maglite shining on a small prism with one of
its face fine ground. Not so much brighter than a high intensity LED.
I am able to see the Foucault image on the the screen at the back of the
camera before tripping the shutter. I made a bracket and use a cable
release to avoid vibrations. I adjust the tester as normal for viewing,
place the camera as close as possible behind the knife , and move it around
until i see the image on the screen, then shoot.( flash off )

Hope this helps,

Jean-Guy




> I am also using a slitless tester. In other words the led is half covered
> with a knife edge (actually a utility knive blade) and I use the same blade
> to cut the returning rays.
>
> I have been polishing for over 4 hours. I still see some pits so I am
> planning at least a couple of more hours of polishing. Of course it is way
> too early to be testing under the knife, but I thought it would be
> interesting to see. The mirror is very reflective at this time so I don't
> think that is the problem.
>
> Maybe my led is way too dim. What light source are you using?

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