I made two videos regarding a air test between automatic and manual ground balance:
This is the automatic test with a stable settings and discrimination at 4:
http://www.youtube.com/watch?v=pMRMdc0l91c
There a some slight interference going on, but here is the test results:
Tiny gold ring= 12,8"
Medium gold ring= 14,6"
Copper Finnish 1 penni= 13,2"
US clad dime= 13,6"
US clad quarter= 16,4"
Copper swedish 1/2
This is the automatic test with a stable settings and discrimination at 4:
http://www.youtube.com/watch?v=pMRMdc0l91c
There a some slight interference going on, but here is the test results:
Tiny gold ring= 12,8"
Medium gold ring= 14,6"
Copper Finnish 1 penni= 13,2"
US clad dime= 13,6"
US clad quarter= 16,4"
Copper swedish 1/2