View previous topic :: View next topic |
Author |
Message |
gdi
Joined: 27 Jun 2010 Posts: 26 Location: ct
|
Posted: Wed May 11, 2011 12:06 am Post subject: Question in Speed Graphic Optical ViewFinder |
|
|
I was getting ready to go out with my Speed Graphic today and as I was packing it up the rotating ring on the viewfinder fell off. This is the ring that has the distance settings for adjusting parallax. I think I was lucky that this happened at home and not in the field - both of the screws that run in the slot in the body had fallen out.
My questions is - does anyone know the size of these screws? They are threaded into plastic and I want to try to prevent stripping them with the wrong thread. If I know the size and thread I can probably get them at the hardware store.
Thanks |
|
Back to top |
|
|
45PSS
Joined: 28 Sep 2001 Posts: 4081 Location: Mid Peninsula, Ca.
|
Posted: Wed May 11, 2011 4:07 am Post subject: |
|
|
Screw, machine special. Part number 33805.
All measurements in inches; made with a digital caliper accurate to 3 decimal places.
Know a good machinist?
The screw pitch tables show measurement D to be middle of the range for a #2-56 or a #2-64 major diameter of the thread but the number of threads in measurement E match 48 tpi. _________________ The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU. |
|
Back to top |
|
|
gdi
Joined: 27 Jun 2010 Posts: 26 Location: ct
|
Posted: Wed May 11, 2011 10:19 am Post subject: |
|
|
45PSS wrote: | Screw, machine special. Part number 33805.
All measurements in inches; made with a digital caliper accurate to 3 decimal places.
Know a good machinist?
The screw pitch tables show measurement D to be middle of the range for a #2-56 or a #2-64 major diameter of the thread but the number of threads in measurement E match 48 tpi. |
Darn, I guess I can forget that, eh? I guess lustig would have them, but require me send the thing to him to screw them in.... |
|
Back to top |
|
|
|