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! > > > > --- > > Rollei List > > > > - Post to rollei_list@xxxxxxxxxxxxx > > > > - Subscribe at rollei_list-request@xxxxxxxxxxxxx > > with 'subscribe' > > in the subject field OR by logging into > > www.freelists.org > > > > - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx > > with > > 'unsubscribe' in the subject field OR by logging > > into www.freelists.org > > > > - Online, searchable archives are available at > > //www.freelists.org/archives/rollei_list > > > > > > --- > Rollei List > > - Post to rollei_list@xxxxxxxxxxxxx > > - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe' > in the subject field OR by logging into www.freelists.org > > - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with > 'unsubscribe' in the subject field OR by logging into > www.freelists.org > > - Online, searchable archives are available at > //www.freelists.org/archives/rollei_list > > --- Rollei List - Post to rollei_list@xxxxxxxxxxxxx - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe' in the subject field OR by logging into www.freelists.org - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field OR by logging into www.freelists.org - Online, searchable archives are available at //www.freelists.org/archives/rollei_list