The table for photo threads is not a thread table in the classic sense. Although threads in the photographic sector are standardized, they cannot be summarized under a single standard. The exception to this is the tripod thread, which is standardized under DIN 4503. Our photo thread table therefore offers you a compilation of the thread types that are used for cameras and their accessories across all manufacturers. In the photo thread table you will find all common threads that enable the attachment of lenses and tripods.
The tripod thread standardized according to DIN 4503 can be found in the photo thread table in form A and form B. Form A is a UNC thread with a 1/4″ diameter and 20 threads per inch pitch, or a UNC thread with a 3/8″ diameter and a pitch of 16 threads per inch. These two thread sizes from the photo thread table describe the internal threads. Form B refers to the external thread with also 1/4″ or 3/8″.
Another DIN-standardized thread from the photo thread table is the Dr wire release thread in accordance with DIN 19004. It has a flank angle of 60° and is available in both conical (form A) and cylindrical (form B) versions. The Dr thread is a metric thread of size M 3.4 x 0.5.
In addition to the threads standardized according to DIN 4503 and DIN 19004, the photo thread table also includes connection threads for camera lenses. The most common representatives here are the C-mount, S-mount and D-mount threads. While C-mount and D-mount are imperial threads, the S-mount thread is represented in the photo thread table with the metric size M 12 x 0.5. There are also other metric threads, but these are largely historical and no longer play a significant role in the photographic sector. Of these, we have only included the Leica thread M 39 x 26 in our photo thread table, as this was particularly widespread and is perhaps still used by one or two enthusiasts today.