Try using an ordinary old age reading magnifying lens to get greater magnification on the image. I find that this works better than filters. Make a bracket that moves an ordinary mini torch 12 LED light onto the image at +- 20 deg angle at fairly close range (+- 6 inch) This should give an aperture of +- f18 at +- 200`th sec , making the shot easier to do in the field. Background will be more in focus due to fstop, but depth of field better. I use an old magnifying glass set in a plastic Marmite lid to hold it to the 52 mm dia lens with a friction fit , and a homemade plywood bracket, with a cheap Chinese LED torch rubber banded on for the job. Focus is set on manual, much easier to focus on what matters by moving the camera back and forth a couple of inches. Whole setup cost a couple of pounds, and does possibly an equal job that an expensive lens does? Disadvantage is that it focuses about 6 inches from subject, maybe causing it to fly / run away.