Pfocus B | a 3D printable budget DIY single focus solution

The Pfocus B is a DIY single focus solution based on a wide-angle converter.
While this has some downsides like soft edges, CA and a widening effect, it also has some benefits like low weight, multiple mounting options, a good wide-angle coverage as well as a short close focus distance. You can find comparative tech specs here: https://grabhole.de/pfocus/pfocusPfamily_techspecs.html
The widening effect can also be considered as a benefit: Pfocus B can deliver an image which is actually wider than what a scope might be able to cover on its own (in other words, wider than what the Rapido FVD-35a could deliver with the same scope).

A general overview about Pfocus units and its history can be found on my website: https://grabhole.de/pfocus/

I understand that charging money for these files is a sudden let down for many, but please also understand the countless hours, test prints, WA evaluations etc that do take a toll on me, not only of my spare time but also financially; I don't even expect to get even with the costs I put into these projects by selling the plans. But it would be cool if it could finance me a Pizza or two.

KEY FEATURES
* Pfocus B can be calibrated for properly hitting infinity focus
* improved mechanics deliver a much better focus-experience
* the used wide-angle converter is dirt cheap and widely available

The Nikon WC-E80 is not really the terrific glass I was looking for. But it has its appeal, especially the price. If you already own a printer, you will be able to build this thing under a hundred Euro.
The issues I see with this glass is CA even towards the center of the frame, a weird zoom-blur effect towards the extreme edges and a very unpleasing colour-fringe around the focus area.
However, I do consider it an ideal budget solution for tinkers and starters; the housing reflects this by delivering only barebones operation without extensive features.

• this build consists of mostly printed parts and is easy to assemble, the pitfall is the needed precision for the print as well as the post-processing of the parts.
• Pfocus B needs some additional hardware that you might need to order internationally
• this build offers three different mounting options - M75 like a Rectilux Hardcore DNA or Rapido FVD-16a, universal mount with lock-screws in 75mm or 70mm for native scope use
• Pfocus B focusses internally, so it's non-protruding/non-rotating front for a somewhat consistent vignette (note: Pfocus B goes the widest at close focus) as well as better (yet not ideal) mattebox use

To get an idea about the performance, you can have a look at this great example video kindly shared by Kapitan Hjerte: https://www.youtube.com/watch?v=CsuaauxR0x8

Please mind the .pdf manual for detailed instructions on how to print, post-process and build this variable diopter. It also contains detailed lists of all additional parts and tools needed for this build.

NOTE: even if this project needs precision, it is still a 3D printed device based on a repurposed wide-angle converter and not a precisely machined, properly calculated variable diopter. Don't expect mechanical or optical performance of an e.g. a Rapido FVD-16a or even Rectilux Hardcore DNA.

Please mind the supplied manual for detailed instructions