The first shot of the purple flowers is with a modified B3 mount Canon J13x9B lens, and the following shots are with a modified B4 mount Canon J13x9B lens. I put Nikon mounts on them and mount them on my Nikon-m4/3 adapter. Forgive the constant zooming - just showing how it holds focus throughout the range. No vignetting with the 2X extender on. These are f/1.6 lenses, but with the 2X extender it's more like f/3.0 - but that's not bad having a constant f/3.0 from 18-234mm!