P3D Belplasca shades and close up attachments

["Franklin J. Flocks" <fjf@xxxxxxxxxx>]

       Belplascas have deeply recessed lenses; as a result, I have 
       never felt the need for lens shades - Moreover, because of the 
       deeply recessed lenses, I would worry that many shades would 
       cause vignetting.  - Regarding filter sizes, Belplascas use 
       a bayonette type filter - not a screw in. - Filters (and 
       perhaps lens shades) designed for Contaflex cameras will fit. 
       I believe they are 27.5 mm in diameter, but at the moment I 
       don't remember for sure.

       And now I have question:  Has anybody here ever used the 
       Belplasca closeup attachment?  I was wondering how it works.
       How close can you get?  Does it cause convergence (toe in) - by 
       the use prismatic lenses.) I have two sets of Contaflex close 
       up lenses. (+ .5, +1, +2 and +3)  Would these be just as good 
       as the fancy Belplasca close up attachment?