[rollei_list] Re: ?? True Sizes of Tripod Mounting Holes
- From: John Jensen <jwjensen356@xxxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Tue, 28 Aug 2007 09:03:23 -0700 (PDT)
Regarding your Praktiflex comment, I found this on the
photonotes.org website:
Tripod mount.
A threaded socket in the base of most cameras to
which a screw can be attached.
These sockets are used to attach camera bodies and
lenses to tripod heads, flash brackets, monopods, etc.
They come in two sizes - 1/4 inch (with 20 threads per
inch pitch, or 1/4-20) for smaller cameras such as
nearly all 35mm cameras and 3/8 inch (with 16 threads
per inch pitch, or 3/8-16) for larger cameras. Even
most European and Japanese manufacturers use these
non-metric sizes for historical reasons, though tripod
mounts with incompatible thread counts are sometimes
found on European and Russian equipment.
cf. flash bracket, monopod, studio pedestal, tripod,
tripod collar.
John
--- Peter J Nebergall <iusar4s@xxxxxxxx> wrote:
> Thank you for clarifying this point! Ever since my
> old Praktiflex (in
> 1966!) I've wondered why my many 3/8 equipped
> pieces didn't work on 3/8
> thread......
>
> Peter Nebergall
>
> On Mon, 27 Aug 2007 16:12:55 -0700 (PDT) John Jensen
> <jwjensen356@xxxxxxxxxxxxx> writes:
> > Marc, I don't see that there is an equivalence to
> the
> > Unified thread and to a standard metric thread.
> For
> > the 3/8-16 thread the pitch distance is 0.0625".
> This
> > is equal to 1.5875 mm. The 3/8" (0.375") thread
> size
> > is slightly smaller than an M10 which has a thread
> > size of 0.3937" and a pitch of 1.5 mm.
> >
> > If there were a hypothetical M9.5 thread (0.374")
> with
> > a 1.5 mm pitch, it would come quite close to
> matching
> > the 3/8-16 thread size. But I don't see that
> there is
> > such an animal.
> >
> > John
> >
> > --- Marc James Small <marcsmall@xxxxxxxxxxx>
> wrote:
> >
> > > I would like to know the true specifications of
> > > the two common tripod threads. I believe that
> > > the larger thread has a Metric measuremetn which
>
> > > works with an SAE thread. I would appreciate
> > > your help in providing the SAE and Metric
> > > measurements for both the smaller and the larger
>
> > > mounts. Extra points to those who can identify
> > > the actual pitch of the thread (DIN, SAE, or
> > > Whitworth, or whatever).
> > >
> > > Enquiring Camera Lore Fanatics Want to Know!
> > >
> > > Marc
> > >
> > >
> > >
> > > msmall@xxxxxxxxxxxx
> > > Cha robh bàs fir gun ghràs fir!
> > >
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