silvergphoto Posted November 22, 2010 Share #1 Posted November 22, 2010 Advertisement (gone after registration) I just acquired a genuine Leica leather case to fit my Leica IIIf camera but the fixing screw inside the case is a smaller diameter than the screw thread in the bottom plate of the camera. In every other respect the case fits the camera perfectly. I read somewhere about there being European vs American (?) thread sizes. If so, does anyone know if there is a screw in adapter that can be used to reduce the size of the thread on the camera? Thanks Quote Link to post Share on other sites More sharing options...
Advertisement Posted November 22, 2010 Posted November 22, 2010 Hi silvergphoto, Take a look here Different thread size Leica IIIf vs Leather Case. I'm sure you'll find what you were looking for!
bill Posted November 22, 2010 Share #2 Posted November 22, 2010 Welcome! There is. You just need a 1/4" to 3/8" adaptor. There are a number of manufacturers and sellers. Try this one. Regards, Bill 1 Quote Link to post Share on other sites More sharing options...
pico Posted November 22, 2010 Share #3 Posted November 22, 2010 I read somewhere about there being European vs American (?) thread sizes Strangely, the size and threads are American Standard. How did that happen? Quote Link to post Share on other sites More sharing options...
bill Posted November 22, 2010 Share #4 Posted November 22, 2010 (edited) They are not "American Standard" they are "Imperial". That's how it happened Regards, Bill Edited November 22, 2010 by bill 1 Quote Link to post Share on other sites More sharing options...
pgk Posted November 22, 2010 Share #5 Posted November 22, 2010 FWIW: British Standard Whitworth - Wikipedia, the free encyclopedia should explain everything you are likely to want to know (go to Current Usage for cameras) Quote Link to post Share on other sites More sharing options...
jaapv Posted November 22, 2010 Share #6 Posted November 22, 2010 Hama Tripod Converter Bush - Model 5120 Tripod Adapter Prices | Review Cheap Deals, Buy and Compare the Cheapest Online Quote Link to post Share on other sites More sharing options...
Peter Enkel Posted April 26, 2017 Share #7 Posted April 26, 2017 Advertisement (gone after registration) I just acquired a genuine Leica leather case to fit my Leica IIIf camera but the fixing screw inside the case is a smaller diameter than the screw thread in the bottom plate of the camera. In every other respect the case fits the camera perfectly. I read somewhere about there being European vs American (?) thread sizes. If so, does anyone know if there is a screw in adapter that can be used to reduce the size of the thread on the camera? Thanks The fixing screw in my leather case is larger than the thread in the bottom plate of my 111F. There appears not to be a bottom plate adaptor bush fitted since there are no slots to facilitate removal. Did Leica produce base plates with differing tripod bush threads? If so, it would seem that I have purchased a case that cannot be used with my camera bottom! Your comments will be much appreciated. Quote Link to post Share on other sites More sharing options...
TomB_tx Posted April 26, 2017 Share #8 Posted April 26, 2017 (edited) Yes, the cameras and cases were made with the different size threads for different world markets. I have cameras and cases with both, including M3s and cases of both types. I think the larger thread was standard in Europe, and I know the smaller was standard in the US. You might find a spare baseplate for your camera to match the case. Edited April 26, 2017 by TomB_tx 1 Quote Link to post Share on other sites More sharing options...
luigi bertolotti Posted April 26, 2017 Share #9 Posted April 26, 2017 (edited) Copying literally the Leitz Catalog of 1961... LEICA M3, as specified, without lens 10150A ditto, 3/8" tripod bush 10650P with the following lenses : ELMAR f 3,5 50mm 10155T ditto, 3/8" tripod bush 10655G .... and so on... (and same "dual coding" existed for lenses scaled in feet or in meters...before they were so smart to invent the currently used "dual scale") Edited April 26, 2017 by luigi bertolotti Quote Link to post Share on other sites More sharing options...
Michael Geschlecht Posted April 26, 2017 Share #10 Posted April 26, 2017 (edited) Hello Everybody, It would have been better for the Photo Industry to standardize on a 3/8 thread for cameras wherever possible. Having used both: The 3/8 diameter screw, with twice the surface gripping ability, holds cameras, etc, better in a number of situations. Because of this: I try to use tripods, ball heads & the like which have 3/8 connections whenever possible. And then connect to the 1/4 fitting(s) only when necessary. Best Regards, Michael Edited April 26, 2017 by Michael Geschlecht Quote Link to post Share on other sites More sharing options...
pico Posted April 27, 2017 Share #11 Posted April 27, 2017 (edited) Do you believe 3/8" x 16 thread creates more significant useful torque than 1/4" x 20? . Edited April 27, 2017 by pico Quote Link to post Share on other sites More sharing options...
skucera Posted April 27, 2017 Share #12 Posted April 27, 2017 The 3/8" x 18 can torque to about 218 in-lbs in silicon bronze; the 1/4" x 20 can torque to about 68.8 in-lbs, also in silicon bronze. Neither is a lot of torque, but there is a difference. However, I think it is more that the 3/8" socket was standard in Europe, and the 1/4" socket was standard in the US. Scott 1 Quote Link to post Share on other sites More sharing options...
pico Posted April 27, 2017 Share #13 Posted April 27, 2017 The 3/8" x 18 can torque to about 218 in-lbs in silicon bronze; the 1/4" x 20 can torque to about 68.8 in-lbs, also in silicon bronze. Neither is a lot of torque, but there is a difference. However, I think it is more that the 3/8" socket was standard in Europe, and the 1/4" socket was standard in the US. (Bold is is mine) That is interesting. Looking at my Super Ikontas, they are 3/8". Thanks for that. Quote Link to post Share on other sites More sharing options...
250swb Posted April 27, 2017 Share #14 Posted April 27, 2017 How did that happen? Alternative facts? Quote Link to post Share on other sites More sharing options...
richardHernandezi Posted August 31, 2020 Share #15 Posted August 31, 2020 I'm in the process of making my own half case for my Leica IIIf and bought the tripod thread adapter. I've read that the thread size on the camera is 3/8 so I bought a 1/4 "female" to 3/8 "male" but the 3/8 male part is too big for my IIIf. Did Leica make a different size thread for certain IIIf's? Quote Link to post Share on other sites More sharing options...
TomB_tx Posted August 31, 2020 Share #16 Posted August 31, 2020 IIIf intended for the US market use 1/4-20 thread, other markets used 3/8 thread. Quote Link to post Share on other sites More sharing options...
Matlock Posted September 2, 2020 Share #17 Posted September 2, 2020 On 11/22/2010 at 1:03 PM, pico said: Strangely, the size and threads are American Standard. How did that happen? Perhaps this can help. Most consumer cameras are fitted with 1/4-20 UNC threads. Larger, professional cameras and lenses may be fitted with 3/8-16 UNC threads, plus a removable 1/4-20 UNC adapter, allowing them to be mounted on a tripod using either standard. Historically, The Royal Photographic Society recommended the thread standard for attaching older cameras to tripods was 3/16-24 BSW (3/16 inch nominal diameter, 24 threads per inch), or 1/4-20 BSW for smaller cameras and 3/8-16 BSW for larger cameras and pan/tilt heads. In this application, the BSW and UNC thread profiles are similar enough that one can mount a modern camera on a legacy tripod and vice versa. The UNC threads are a 60-degree angle and flattened, whereas the BSW are a 55-degree angle and rounded crest. Quote Link to post Share on other sites More sharing options...
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