Thanks Fred, I've got one around here that needs your surgery. This method looks much safer to me. No crumbs in the lens! Regards, Bob S.
On 2/11/06, Fred <[EMAIL PROTECTED]> wrote: > Well, I've removed the excess K-mount flange "collar" from a number of > Vivitar Series 1 gems of the 1970's, either by masking off the collar > completely, leaving everything in place, or by removing the K-mount flange > and then masking off the collar. In either case, it's a pretty simple task > to cut away the excess collar material, remove the masking, blacken the > shiny cut areas (and, if necessary, put the K-mount flange back). I've > posted here (with image links) info on these previous operations. > > Well, instead, I decided this time to just simply remove the collar > assembly itself in order to remove the collar from it (i.e., to perform a > "collarectomy") - this is sort of half way between the previous methods > I've described. This post documents this method, as carried out on a VS1 > 90-180/4.5 Flat Field Zoom. > > First, remove the three ~very~ small screws securing the collar assembly - > http://www.cetussoft.com/pentax/vs1/collarectomy01.jpg > > Then remove the assembly for surgery (leaving the innards of the K-mount > temporarily exposed, so you might want to cover the K-mount to keep dust > out) - http://www.cetussoft.com/pentax/vs1/collarectomy02.jpg > > Here is the assembly, showing the collar, most of which is to be removed - > http://www.cetussoft.com/pentax/vs1/collarectomy03.jpg > > Don't lose those three little screws - they're tiny !!! > http://www.cetussoft.com/pentax/vs1/collarectomy04.jpg > > Make a small almost-vertical cut, separating the end of the collar near the > diaphragm lever that can be left attached (mimicking a jen-you-wine Pentax > K-mount) from the collar area to be removed - > http://www.cetussoft.com/pentax/vs1/collarectomy05.jpg > > Start cutting horizontally from the other end of the collar towards that > first almost-vertical cut - > http://www.cetussoft.com/pentax/vs1/collarectomy06.jpg > > Keep cutting until the two cuts meet - > http://www.cetussoft.com/pentax/vs1/collarectomy07.jpg > > This is how the assembly will look after the collar is all the way off - > http://www.cetussoft.com/pentax/vs1/collarectomy08.jpg > > File smooth and flat the cuts (removing any burrs that remain), and then > cover the shiny exposed aluminum with something black (I use a black > permanent "magic marker") - > http://www.cetussoft.com/pentax/vs1/collarectomy09.jpg > > Replace the modified assembly and its three retaining screws - > http://www.cetussoft.com/pentax/vs1/collarectomy10.jpg > > And then mount your old classic on your newer Pentax body and play - > http://www.cetussoft.com/pentax/vs1/collarectomy11.jpg > > Enjoy !!! > > Fred > >
