I have fair knowledge of photography and undertake normal product /portrait photography with strobe lights. I want to know how to do focus racking of products with strobe lights. I have four strobes, macro lens and Canon 6D with remote trigger. Most of the tutorials are about focus stacking under continuous lights. For the photography with strobes, my camera settings are 1/160, f/7 and ISO 100. There is nothing visible in the EVF and/or LCD.