Yesterday I finally got round to trying out the Cosina Voigtlander Heliar 75mm f/1.8 Classic on my Panasonic GH1.
The first thing to say is that this is a beautifully made lens. Voigtlanders are well put together generally but this one is especially good. Lovely smooth focus ring and aperture click stops. It feels substantial but not over heavy. Its a thin design and medium long. (From review with M9 at
/soundimageplus/2010/10/voigtlander-75mm-f18-classic-heliar-on.html) Since the GH1 is a smaller lighter camera than the M9 there is a different feel to the outfit. At 427g the lens is slightly heavier than the camera. However there's a nice solid feel to the combination.