Postcard format
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| postcard format cameras Heag II Ser. II, Junior and Black Beauty |
Some exposure formats are also known as postcard format. These are
| Format | Aspect ratio | Centimetres |
| Common postcard formats | ||
| 10×15 cm | 3:2 | 10×15 |
| 3¼×5½ inch | 22:13 | 8¼×14 |
| Special postcard formats | ||
| 2½×3½ inch (tintype postcard, see Mandel-ette) |
7:5 | 6 1/3×9 |
These exposure formats are all resembling the common format of postcards or postal cards or were actually used for making postcard photo prints. Postcards became popular since 1875 when the postal card was accepted as international standard for lower rate message sending on un-enveloped rectangular pieces of cardboard, with postal cards mainly w/o picture as kind of prepaid letter, and postcards with image side and writing side. In the early 20th century the format was quite popular as photographic exposure format. Postcards could be made easily from the negatives as contact prints. Special photo paper in thin cardboard quality could be used, with the field for address and stamp on the back.
Links
- Postcard on Wikipedia
