I want to magnify the smallest of smallest bugs. I'm new at macro photography and I find that I derive great joy in magnifying the smallest of smallest bugs. These bugs are so small and they just sit still. I'm not interested in chasing butterflies and fast moving ants. I make all my photos using a tripod and macro focusing rail. I've been shooting all my photos with a Tamron 90mm lens and 3 extension tubes (13mm, 21mm and 31mm) attached to the back of the lens but I still need more magnification. I need more magnification still. Will a 2x teleconverter help my cause? Will a 2x teleconverter eat into DOF? What about a 2-element close focus filter? Would it be ridiculous to use a 2x teleconverter + 3 extension tubes?