Hi, I have read some reviews stating that the version II of the voigtlander 25mm just adds clickless for video but retains the same optical formula as version I. However what has also been observed by a number of reviewers is that the version II of the lens is noticeably sharper with more contrast wide open - perhaps there were revisions to the optical formula or difference in glass used to account for the weight difference between the two? I've seen no mention of improvements such as floating elements similar to a Noctilux or anything exotic like that added. What I would like to know though, is if anybody here has tried both side by side and what your opinions were ? Is this likely sample variation or actual improvements in optical design? http://www.ephotozine.com/article/voigtlander-25mm-f-0-95-nokton-version-ii-lens-review-25344 Thanks, Tom.