<P> The specifications for 120 and 220 film are defined in the ISO 732 standard . Earlier editions of ISO 732 also provided international standards for the 127 and 620 film formats . </P> <P> 120 film allows several frame sizes . </P> <Table> 120 frame sizes <Tr> <Th> Name </Th> <Th> Aspect ratio </Th> <Th> Nominal size (mm) </Th> <Th_colspan="2"> Exposures </Th> </Tr> <Tr> <Th> 120 </Th> <Th> 220 </Th> </Tr> <Tr> <Th> 6 × 4.5 </Th> <Td> 1.35: 1 </Td> <Td> 56 × 41.5 </Td> <Td> 15 or 16 </Td> <Td> 30--32 </Td> </Tr> <Tr> <Th> 6 × 6 </Th> <Td> 1: 1 </Td> <Td> 56 × 56 </Td> <Td> 12 or 13 </Td> <Td> 24--27 </Td> </Tr> <Tr> <Th> 6 × 7 </Th> <Td> 1.20: 1 </Td> <Td> 56 × 67 </Td> <Td> 10 </Td> <Td> 21 </Td> </Tr> <Tr> <Th> 6 × 8 </Th> <Td> 1.37: 1 </Td> <Td> 56 × 77 </Td> <Td> 9 </Td> <Td> 19 </Td> </Tr> <Tr> <Th> 6 × 9 </Th> <Td> 1.50: 1 </Td> <Td> 56 × 84 </Td> <Td> 8 </Td> <Td> 18 </Td> </Tr> <Tr> <Th> 6 × 12 </Th> <Td> 2.1: 1 </Td> <Td> 56 × 118 </Td> <Td> 6 </Td> <Td> 12 </Td> </Tr> <Tr> <Th> 6 × 17 </Th> <Td> 3: 1 </Td> <Td> 56 × 168 </Td> <Td> </Td> <Td> 9 </Td> </Tr> <Tr> <Th> 6 × 24 </Th> <Td> 4: 1 </Td> <Td> 56 × 224 </Td> <Td> </Td> <Td> 6 </Td> </Tr> </Table> <Tr> <Th> Name </Th> <Th> Aspect ratio </Th> <Th> Nominal size (mm) </Th> <Th_colspan="2"> Exposures </Th> </Tr>

How many shots on a roll of 120 film
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