If you want to provide a list of 50's 55's equivalent list of other formats, I can add them to the list.
Here is what is currentlty liosted in the choices of 50's you can select from if not picked up from EXIF.
Code:
id | lens | focallength
--------+----------------------------------------------------------+-------------
364 | 3.5/50MM ELMAR LTM | 50
71 | CANON 50MM F1.5 | 50
64 | CANON LTM 50MM F0.95 | 50
286 | CANON LTM 50MM F1.2 | 50
287 | CANON LTM 50MM F1.4 | 50
288 | CANON LTM 50MM F1.8 | 50
214 | FED 50 | 50
116 | JUPITER-3 50MM F1.5 | 50
120 | JUPITER 8 - 50MM F2 | 50
122 | KONICA HEXANON-M 50MM F1.2 | 50
123 | KONICA HEXANON-M 50MM F2 | 50
150 | LEICA 50MM F1.4 SUMMILUX 1ST VERSION | 50
290 | LEICA 50MM F1.4 SUMMILUX 2ND VERSION | 50
125 | LEICA 50MM F1.4 SUMMILUX 3RD VERSION 1997 (ROM CONTACTS) | 50
126 | LEICA 50MM F2.0 SUMMICRON 1ST VERSION 1964 | 50
1082 | LEICA 50MM F2.0 SUMMICRON 2ND VERSION | 50
127 | LEICA 50MM F2.0 SUMMICRON 2ND VERSION | 50
70 | LEICA 50MM F4 PHOTAR | 50
156 | LEICA APO SUMMICRON 50MM F2 ASPH | 50
53 | LEICA ELMAR 50MM F2.8 | 50
54 | LEICA ELMAR 50MM F3.5 | 50
380 | LEICA NOCTILUX 50MM F0.95 ASPH | 50
381 | LEICA NOCTILUX 50MM F1 | 50
382 | LEICA SUMMAR 50MM F2 | 50
324 | LEICA SUMMARIT 50MM F2.5 | 50
323 | LEICA SUMMICRON 50MM F2 | 50
334 | LEICA SUMMICRON 50MM F2 (RIGID) | 50
275 | LEICA SUMMILUX 50MM F1.4 ASPH | 50
222 | LEICA SUMMILUX 50MM F1.4 PRE ASPH (E43) | 50
1 | LEICA SUMMILUX 50MM F1.4 PRE ASPH (E46) | 50
201 | LEICA SUMMITAR 50MM F2 | 50
1091 | LEICA SUMMITAR 50MM F2 | 50
435 | LEICA TRI-ELMAR 28-35-50MM F4 ASPH | 50
216 | LEITZ SUMMICRON - M 1:2 / 50 (CANADIAN) | 50
924 | NIKON 24-50MM F3.3-4.5 AF | 50
925 | NIKON 24-50MM F3.3-4.5D AF | 50
887 | NIKON 25-50MM F4.0 | 50
889 | NIKON 28-50MM F3.5 MACRO | 50
1027 | NIKON 50MM F1.1 | 50
789 | NIKON 50MM F1.2 | 50
790 | NIKON 50MM F1.4 | 50
847 | NIKON 50MM F1.4 AF | 50
848 | NIKON 50MM F1.4D AF | 50
851 | NIKON 50MM F1.4G AF-S | 50
1039 | NIKON 50MM F1.4 MILLENIUM | 50
1029 | NIKON 50MM F1.5 | 50
791 | NIKON 50MM F1.8 | 50
849 | NIKON 50MM F1.8 AF | 50
850 | NIKON 50MM F1.8D AF | 50
1089 | NIKON 50MM F1.8G AF-S | 50
792 | NIKON 50MM F2.0 | 50
1031 | NIKON 50MM F3.5 MICRO | 50
1099 | PORST COLOR REFLEX MC 50MM/1.7 | 50
1058 | SIGMA 17-50MM F2.8 EX DC OS HSM | 50
1044 | SIGMA 18-50MM F2.8 EX DC MACRO HSM | 50
1129 | SIGMA 50MM F1.4 ART | 50
1051 | SIGMA 50MM F1.4 EX DG HSM | 50
1059 | SIGMA 50MM F2.8 EX DG MACRO | 50
1034 | SUMMILUX-M 1:1.4/50 ASPH. | 50
487 | SUMMILUX-M 50MM F1.4 ASPH. | 50
1050 | TAMROM SP 17-50MM F2.8 DI II | 50
1065 | TOKINA 16-50MM F2.8 DX | 50
187 | VARIO ELMARIT 14-50MM F2.8- 3.5 ASPH | 50
1121 | VARIO ELMARIT 14-50MM F2.8-3.5ASPH | 50
418 | VOIGTLANDER 50MM F1.1 NOKTON | 50
44 | VOIGTLANDER 50MM F1.5 NOKTON | 50
420 | VOIGTLANDER 50MM F2.0 HELIAR | 50
488 | VOIGTLANDER 50MM F2.5 SKOPAR | 50
500052 | VOIGTLANDER 50MM F2 APO LANTHAR VM | 50
186 | VOIGTLANDER 50MM F3.5 HELIAR | 50
1098 | YASHINON DX 50MM/1.4 | 50
468 | ZEISS C DISTAGON 50MM F2.8 | 50
396 | ZEISS CF DISTAGON F4 50 | 50
219 | ZEISS C/Y CARL PLANAR 50 F1.4 | 50
500045 | ZEISS CY CARL PLANAR 50 F1.4 | 50
3 | ZEISS C/Y PLANAR 50MM F1.4 | 50
500012 | ZEISS CY PLANAR 50MM F1.4 | 50
2 | ZEISS C/Y PLANAR 50MM F1.7 | 50
500011 | ZEISS CY PLANAR 50MM F1.7 | 50
170 | ZEISS F DISTAGON 50MM F2.8 | 50
99 | ZEISS IIA/IIIA OPTON SONNAR 50MM F1.5 | 50
252 | ZEISS JENA FLEKTOGON F4 50MM | 50
459 | ZEISS JENA PANCOLAR MC 50MM F1.8 | 50
351 | ZEISS JENA PRAKTICAR 50MM F1.4 | 50
345 | ZEISS JENA TESSAR 50MM F2.8 | 50
72 | ZEISS LOXIA 50MM F2 PLANAR T* | 50
244 | ZEISS MAKRO PLANAR F2.0 50MM | 50
78 | ZEISS MILVUS 50MM F1.4 | 50
79 | ZEISS MILVUS 50MM F2 | 50
471 | ZEISS N PLANAR 50MM F1.4 | 50
512 | ZEISS PLANAR F1.4 50MM | 50
456 | ZEISS PLANAR FE 50MM F1.4 ZA | 50
350 | ZEISS ROLLEI-HFT PLANAR 50MM F1.8 | 50
302 | ZEISS TESSAR 50MM F2.8 TLR | 50
442 | ZEISS TOUIT F2.8 50MM MACRO | 50
360 | ZEISS ZA PLANAR 50MM F1.4 | 50
1004 | ZEISS ZF-II MAKRO-PLANAR T* F2.0 50MM | 50
1000 | ZEISS ZF-II PLANAR T* F1.4 50MM | 50
990 | ZEISS ZF MAKRO-PLANAR T* F2.0 50MM | 50
986 | ZEISS ZF PLANAR T* F1.4 50MM | 50
410 | ZEISS ZM C SONNAR F1.5 50MM | 50
87 | ZEISS ZM C SONNAR T* F1.5 50MM | 50
409 | ZEISS ZM PLANAR F2.0 50MM | 50
83 | ZEISS ZM PLANAR T* F2.0 50MM | 50
416 | ZEISS ZS PLANAR F1.4 50MM | 50
(105 rows)
And here is the list of 35's for 35mmimages.com
Code:
id | lens | focallength
--------+--------------------------------------------------+-------------
239 | CANON LTM 35MM F1.5 | 35
65 | CANON LTM 35MM F1.8 | 35
285 | CANON LTM 35MM F2 | 35
98 | CARL ZEISS JENA VARIO-PANCOLAR 2.7-3.5/35-70 M42 | 35
114 | JUPITER 12 - 35MM F2.8 | 35
480 | LEICA 35–70 F4.0 VARIO ELMAR | 35
327 | LEICA 35MM F1.4 SUMMILUX | 35
328 | LEICA 35MM F2.0 SUMMICRON 1ST VERSION 1970 | 35
329 | LEICA 35MM F2.0 SUMMICRON 2ND VERSION 1976 | 35
146 | LEICA 35MM F2.8 ELMARIT 1ST VERSION 1964 | 35
343 | LEICA 35MM F2.8 ELMARIT 2ND VERSION | 35
147 | LEICA 35MM F2.8 ELMARIT 3RD VERSION | 35
503 | LEICA 35MM F4.0 PA CURTAGON (SCHNEIDER) | 35
52 | LEICA ELMAR 35MM F3.5 | 35
1115 | LEICA ELMAR 35MM F3.5 COLLAPSIBLE | 35
159 | LEICA ELMAR 35MM F3.5 COLLAPSIBLE | 35
331 | LEICA SUMMARIT 35MM F2.5 | 35
223 | LEICA SUMMARON 35MM F2.8 | 35
224 | LEICA SUMMARON 35MM F3.5 | 35
321 | LEICA SUMMICRON 35MM F2. | 35
199 | LEICA SUMMICRON 35MM F2 1ST VERSION | 35
241 | LEICA SUMMICRON 35MM F2 ASPH | 35
225 | LEICA SUMMILUX 35MM F1.4 | 35
274 | LEICA SUMMILUX 35MM F1.4 ASPH | 35
130 | MS SUPER TRIPLET PERAR F3.5 35 MK I | 35
454 | MS SUPER TRIPLET PERAR F3.5 35 MK II | 35
949 | NIKON 16-35MM F4G ED AF-S VR | 35
915 | NIKON 17-35MM F2.8 ED-IF AF-S | 35
1128 | NIKON 18-35MM 3.5-4.5G | 35
923 | NIKON 18-35MM F3.5-4.5D ED-IF AF | 35
917 | NIKON 20-35MM F2.8D IF | 35
784 | NIKON 35MM F1.4 | 35
1049 | NIKON 35MM F1.4G AF-S | 35
1024 | NIKON 35MM F1.8 | 35
1143 | NIKON 35MM F1.8G AF-S | 35
963 | NIKON 35MM F1.8G AF-S DX | 35
785 | NIKON 35MM F2.0 | 35
845 | NIKON 35MM F2.0 AF | 35
846 | NIKON 35MM F2.0D AF | 35
1025 | NIKON 35MM F2.5 | 35
786 | NIKON 35MM F2.8 | 35
1026 | NIKON 35MM F3.5 | 35
751 | NIKON PC 35 3.5 PERSPECTIVE CONTROL | 35
756 | PC-NIKKOR 35 3.5 | 35
1081 | SAMYANG 35MM F1.4 AE | 35
500054 | SCHNEIDER-KREUZNACH 35MM F3.5 | 35
1133 | SIGMA18- 35MM F1.8 ART | 35
1134 | SIGMA 24-35MM F2 ART | 35
1127 | SIGMA 35MM F1.4 ART | 35
1084 | SIGMA AFD 17-35MM F1:2.8/4.0 EX IF | 35
1123 | SIGMA ART 18-35MM F1.8 DC | 35
1126 | SIGMA ART 18-35MM F1.8 DC HSM | 35
103 | SUMMARIT 35MM F2.5 ASPH | 35
483 | T3 ZEISS 35MM F2.8 SONNAR | 35
1043 | TAMRON 17-35MM F2.8-4 | 35
1145 | TAMRON 35MM F1.8 SP | 35
1074 | TOKINA 35MM F2.8 DX MACRO | 35
294 | VOIGTLANDER 35MM F1.2 NOKTON | 35
182 | VOIGTLANDER 35MM F1.4 NOKTON | 35
463 | VOIGTLANDER 35MM F2.5 COLOR SKOPAR CLASSIC | 35
500051 | VOIGTLANDER 35MM F2 APO LANTHAR VM | 35
33 | ZEISS 645 DISTAGON 35MM F3.5 | 35
490 | ZEISS C/Y DISTAGON 35MM F1.4 | 35
500001 | ZEISS CY DISTAGON 35MM F1.4 | 35
491 | ZEISS C/Y DISTAGON 35MM F2.8 | 35
500006 | ZEISS CY DISTAGON 35MM F2.8 | 35
492 | ZEISS C/Y PC-DISTAGON 35MM F2.8 | 35
500007 | ZEISS CY PC-DISTAGON 35MM F2.8 | 35
433 | ZEISS DISTAGON 35MM F1.4 FE ZA | 35
256 | ZEISS DISTAGON F1.4 35MM | 35
514 | ZEISS DISTAGON F2.0 35MM | 35
403 | ZEISS FE 35MM F2.8 ZA | 35
104 | ZEISS G PLANAR 35MM F2 | 35
339 | ZEISS JENA BIOGON 35MM F2.8 | 35
348 | ZEISS JENA FLEKTOGON 35MM 2.8 | 35
250 | ZEISS JENA FLEKTOGON F2.4 35MM | 35
251 | ZEISS JENA FLEKTOGON F2.8 35MM | 35
73 | ZEISS LOXIA 35MM F2 BIOGON T* | 35
80 | ZEISS MILVUS 35MM F2 | 35
42 | ZEISS N VARIO SONNAR 17-35MM F2.8 | 35
304 | ZEISS TESSAR 35MM F2.8 TLR | 35
74 | ZEISS VARIO-TESSAR T* FE 16-35MM F4 ZA OSS | 35
415 | ZEISS ZA VARIO-SONNAR F2.8 16–35MM | 35
359 | ZEISS ZEISS SONNAR 35MM F2 | 35
95 | ZEISS ZEISS TESSAR F3.5 35 | 35
988 | ZEISS ZF DISTAGON T* F2.0 35MM | 35
995 | ZEISS ZF DISTAGON T* F2 35MM ZF-I | 35
1075 | ZEISS ZF-II DISTAGON T* F1.4 35MM | 35
1002 | ZEISS ZF-II DISTAGON T* F2.0 35MM | 35
1009 | ZEISS ZF-II DISTAGON T* F2 35MM ZF-I | 35
408 | ZEISS ZM BIOGON F2.0 35MM | 35
268 | ZEISS ZM BIOGON T* F2.0 35MM | 35
257 | ZEISS ZM C BIOGON F2.8 35MM | 35
272 | ZEISS ZM C-BIOGON F2.8 35MM | 35
91 | ZEISS ZM DISTAGON F1.4 35MM | 35
88 | ZEISS ZM DISTAGON T* F1.4 35MM | 35
89 | ZEISS ZS DISTAGON F2.0 35MM | 35