Vivitar VI and 356 enlarger accessories

1. Lensboard for the Vivitar VI enlarger and 39mm lenses.
   
   You'll need a retaining ring, and depending on the printing material, you might need to spray flat black paint once or twice to avoid translucency.
   4-5 top and bottom layers in black PLA+ worked fine to avoid translucency
   Sanding of the holes might be needed to match your enlarger and allow easy install of the board
   1A - 2025-06 due to request I have added several other diameters of lensmounts (holes), 50mm, M42
    
2. Filter holder for 89mm (3-1/2") multigrade filter to go between the condensers
   2025-08 version E is a 2 piece print to hold the filters securely
   I made this one for split printing to avoid fumbling with the gel filters in the dark.
    
3. A holder for a 52mm round red filter as safety filter for focusing.  
   Mount in the screw holes behind the bellows by the lens mount with 6-32 (M3.5) screw at least 2" long or an extension post and 2 bolts
   2025-10 Mk2 of the safety filter was made after using the 1st for some time.  It is more stable and easier to mount as seen in the picture, you'll need:
   1. a 6-32 (M3.5) long screw (About 3" or 70mm). 
   2. 2 matching nuts, and 
   3. heat shrink tubing to mask the metal (optional) 

All these models might need some sanding and drilling to match your enlarger and printer tolerance