For Minolta Maxxum 7D,5D Dimage 5,7,7i,7Hi,A1,A2
The Minolta FS1100 flash shoe adapter modified with an
isolation circuit for camera protection.
For use with flashes with higher than recommended trigger voltages.
This circuit does not work reliably with some older Vivitar 283 units
because they cause the SCR to latch on. Possibly because the trigger circuit
in the flash is close to pure DC. SCRs are AC devices.