|Posted: Sat Jan 07, 2017 5:02 pm Post subject: DIY new mount for novoflex pistol grip follow focus (A)?
|This is the mount end of my early version novoflex:
The silver collar holds the mount on. The mount rotates from landscape to portrait, you can see the ball bearing that clicks. The mount is 2 piece, three small M2 bolts secure it, when these are loosened or removed the 2 halves unscrew. The thread is M42x0.5 (measured ID of female end = 42.3mm, OD of male = 41.9mm using cheap vernier calliper which may not be very accurate).
So my plan is to use an old M39 t-mount:
Cut off the circumference with the grub screws A leaving flat surface B on which cheap M42 adapters for PK, sony A etc can be attached. The nub of it is adapting the M39 screw to M42x0.5, so that this can be screwed in. I was thinking of filling the gap with steel epoxy putty, using WD40 to prevent that sticking to the M42 thread so it will unscrew. But a bit of a rim on the LH side of the middle piece means that won't be so easy to do. Any ideas - is an adaptive piece M42x.0.5 to M39 an off the shelf thing from an engineering works? Is that something a 3D printer could do?
pentax ME super (retired)
Pentax K5; Samsung NX 20; Lumix G1;
Adaptall collection (proliferating!) inc 200-500mm 31A.
Primes inc takumar 55mm; smc 28mm, 50mm; sigma superwide II; helios 58mm, Tamron Nestar 400mm, novoflex 400mm, Vivitar 135mm close focus, 90mm macro; Jupiter 11A; CZJ 135mm.
A classic zoom or two: VS1 (komine), Kiron Zoomlock...