Karlphoto asked a good question (below) about the impact of the Voigtlander VM-E close adapter on the 90 Elmarit lens.
Below are 'normal' vs 'close' examples when using this adapter on a Sony A7S. Incidentally, I really like the rendering of the 90 Elmarit on both the A7R and A7S cameras.
For the uninformed the VM-E adapter has a helicoid which moves the lens away from the sensor acting a bit like a macro tube. It shortens the focussing distance but the benefit varies - the wider the angle the closer the focus.
I don't find much benefit from the adapter but I will state that it is beautifully made and equal if not better than my Novaflex adapter - both of which are high quality adapters for M-bayonet lenses for the Sony NEX/Alpha systems.
Normal close focusing distance on Leica Elmarit 90/2.8
With close focus adapter engaged on Leica Elmarit 90/2.8
Normal close focusing distance on Leica Elmar 50/2.8
With close focus adapter engaged on Leica Elmar 50/2.8
Normal close focusing distance on Voigtlander Ultron 21/1.8
With close focus adapter engaged on Voigtlander Ultron 21/1.8