Pfocus A | a 3D printable DIY single focus solution

cults3d

The Pfocus A is a DIY single focus solution based on a Zunow WCX-80 (or Fujinon WCV-82SC) 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 A 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. If you already made the Pfocus before, you can still benefit from the features this housing offers as the glass is compatible. KEY FEATURES * Pfocus A can be calibrated for properly hitting infinity focus and features markings in either imperial or metric * improved mechanics deliver a much better focus-experience * a rudimentary dirt-preventation will help leaving your competition in the dust, but not your Pfocus * rich hard-stops for infinity and close focus * you can use two different wide-angle adapters with this housing: the Zunow WCX-80 as well as the good ol' Fujinon WCV-82SC (Fujinon will need some parts printed differently, which is explained in the manual) * focus gears are sperate from the helicoid and light path, now you can use a dope contrast colour fitting your setup! The Zunow WCX-80 can still be purchased today but is horribly expensive when bought new; however, getting good deals on them is not as hard as it seems. Optically, it's a tad worse than the Fujinon (I know right, I didnÄt thought so as well); to get a glimpse of what to expect from this glass, have a look at Titos review of the original Pfocus (which used the Fujinon glass): https://www.youtube.com/watch?v=VdiuNXBOR0o 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 A needs some additional hardware that you might need to order internationally this build is meant to be somewhat modular, therefore it can be made with different front filter threads, markings in metric and imperial and two (and a half) different mounting options - M75 like a Rectilux Hardcore DNA or Rapido FVD-16a, universal mount with lock-screws in 75mm and (with an additional, provided sleeve) 70mm for native scope use Pfocus A focusses internally, so it's non-protruding/non-rotating front for a consistent vignette as well as better mattebox use 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.