Peter Moretti 2 Posted December 5, 2010 Does anyone know what the flange focal distance is for B4 mount lenses? I've searched the web pretty exhustively but have yet to find the number. I believe it is significantly longer than PL's 52mm. Thanks much! Quote Share this post Link to post Share on other sites
Brian Drysdale 161 Posted December 5, 2010 Checking, I came across 48mm being mentioned. http://imagelabs.com/tools/index.php Quote Share this post Link to post Share on other sites
Peter Moretti 2 Posted December 6, 2010 So this would seem to indicate that you can use PL glass on B4 cameras. I did not know that. I always thought the long back focus on 2/3rd's cameras prevented the use of PL glass w/ a straight mechanical adapter. But I could very well be mistaken. Quote Share this post Link to post Share on other sites
