I'm enjoying a Voigtlander 35mm f/2.5 on my OM-D, but I'm finding that the Rainbowimaging M mount adapter I'm using was a little over zealous in their aim at allowing for infinity focus. I have infinity focus and then some. And that's great, but their caution has also resulted in a much longer minimum focusing distance than the 70cm that the lens is supposed to have. It's more like 90cm...which is nearly an 8 inch loss. And that's unacceptable to me. Any suggestions for an alternative...?