Re:High speed Tesla spark photographs

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Original poster: Russell L Thornton <Russell.L.Thornton@xxxxxxxx>


Thanks Gary and Terry.  I am a little more informed but just 
barely.  Gary, what is a FRES?  I could not find a def that fit on the web.
Also, I can see a little better why the streaking is minimal.  I 
think you are assuming that you are catching just one spark strike 
since more than one in a single pass of the mirror at 5000 RPM ( = 
1/83 second shutter speed) would show parallel sparks along the 
smear.  I have seen photos of lightning where the camera is 
rotated  in azimuth during a single exposure and the film captures 
multiple strikes.  That being the case now that you have convinced 
yourself that at a single mirror RPM of 5000 delivers you a single 
strike the shutter speed is now basically somewhere between 1/60 and 
1/125.  Why don't you just shoot direct and eliminate the mirror and 
smearing? Or am I still confused?

Russ