Lenses with Threaded Mount
mm , OD inch , OD Type Actual Common usage Flange- focal dist.           Note
          mm  
10 0.39 X mount M10 x 0.5 digital cameras?    
12 0.47 S mount M12 x 0.5 early 8mm movie cameras    
15.9 0.625 D mount .625 x 32 tpi early 8mm movie cameras 12.29  
24 0.945 Narciss M24 x 1.0 Narciss  (Narcissus?) 28.8  USSR submini SLR uncommon
25 0.984 Schneider 00 M25 x 0.5 European enlarging lens                    N/A  no focus capability
25.4 1 CS mount 1.0 x 32 tpi video cameras 12.5 short register version of C mt.
25.4 1 C mount 1.0 x 32 tpi 16mm movie cameras 17.526  
26 1.02 Robot Screw M26 x 0.75 Early Robot bodies                           ? Some later Robot screw M26x1.0
37 1.456 Asahiflex M37 x 1.0 Early Asahiflex bodies            uncommon
38 1.496 Opema M38 x 1.0 (?) Opema screw                           ? Mfg. by Meopta Czech.  - rare
39 1.535 Canon Screw M39 x 1.0 Early Canon RF Screw 28.8  Not the same as M39 x 26 tpi
39 1.535 Paxette M39 x 1.0 Paxette Reflex 44          uncommon
39 1.535 Zenit M39 x 1.0 Zenit 3M  SLR body 45.46          uncommon
39 1.535 Leica Screw M39 x 26 tpi Standard enlarging lens                    N/A  no focus capability
39 1.535 Leica Screw M39 x 26 tpi Early Leica bodies 28.8 Leica LTM  (Leica Thread Mount)
40 1.57 Practiflex M40 x 1.0 Early Practiflex bodies 45.5           uncommon
41.2 1.62 Wrayflex M41.2 x 26 tpi Wrayflex bodies 42.05           uncommon
42 1.65 T, T2 mount* M42 x 0.75 Interchangeable SLR 55   pre-set diaphragm
42 1.65 YS mount M42 x 0.75 Interchangeable SLR 55   auto diaphragm version of T, T2
42 1.65 Pentax Screw M42 x 1.0 Pentax Screw bodies 45.46  Pentax Praktica M42 mount
44 1.73 Miranda M44 x 1.0 Miranda Screw 41.5  Miranda bayonet + screw
44 1.73 Kalimar M44 x  0.75 Kalimar 660, Fujita 66                                 ?         6x6 SLR
57 2.244 Bronica S M57 x 1.0 Bronica S screw 101.7  Threaded inside of focus mount
60 2.3625 Hasselblad M60 x 2.0 Early Hasselblad  ** 82.1 1000F, 1600F only,  no shutter
* T mount has fixed solid ring, T-2 has adjustable ring insert.
** Hasselblad mount is a hybrid.  Screw mount, with bayonet type function.