The Dictionary Of Photography
A True Historic Record Of The Art & Practice Of Photography 100 Years Ago.
|
Fixed Focus |
||
|
|
||
 |
||
|
|
||
|
Then  Taking of an inch as the permissible error, we have worked out from Mr. Cheyney's rule the following table, which may be useful: - |
||
|
Point Beyond «which All Objects will be in Focus. |
||
|
|
||
 |
||
|
|
||
|
We may also give Miethe's table of fixed foci: - |
||
|
|
||
 |
||