contact_me   index   photographs   equipment   photography   darkroom   links
These links take you to various articles relating to using press cameras

Depth of Field Table
135mm Optar on Pacemaker '45' Graphics

Note: These are for an 8x10 print or larger viewed at the usual distances.
For a cropped print close down one stop.
For a contact print open up one stop.

F-Stop Hyper-
focal 		Near
dist. 		Far
dist. 		           F-Stop Hyper-
focal 		Near
dist. 		Far
dist.
                 
Focus  Dist. = 6'     Focus  Dist. = 25'  
4.7 93 5.64 6.41   4.7 93 19.71 34.18
5.6 78 5.57 6.50   5.6 78 18.94 36.76
8 55 5.41 6.74   8 55 17.16 46.05
11 40 5.21 7.07   11 40 15.35 67.31
16 27 4.92 7.69   16 27 13.06 291.67
22 20 4.61 8.59   22 20 11.08 INF
32 14 4.17 10.69   32 14 8.84 INF
                 
Focus  Dist. = 8'     Focus  Dist. = 50'  
4.7 93 7.37 8.75   4.7 93 32.53 108.02
5.6 78 7.26 8.91   5.6 78 30.49 138.89
8 55 6.98 9.37   8 55 26.12 583.33
11 40 6.66 10.01   11 40 22.15 INF
16 27 6.19 11.31   16 27 17.68 INF
22 20 5.70 13.38   22 20 14.23 INF
32 14 5.05 19.28   32 14 10.74 INF
                 
Focus  Dist. = 10'     Focus  Dist. = 75'  
4.7 93 9.03 11.20   4.7 93 41.53 386.03
5.6 78 8.87 11.47   5.6 78 38.27 1875.00
8 55 8.45 12.24   8 55 31.63 INF
11 40 7.99 13.36   11 40 25.99 INF
16 27 7.32 15.77   16 27 20.04 INF
22 20 6.65 20.11   22 20 15.72 INF
32 14 5.78 37.23   32 14 11.56 INF
                 
Focus  Dist. = 15'     Focus  Dist. = 100'  
4.7 93 12.92 17.88   4.7 93 48.21 INF
5.6 78 12.58 18.56   5.6 78 43.86 INF
8 55 11.77 20.67   8 55 35.35 INF
11 40 10.89 24.08   11 40 28.46 INF
16 27 9.69 33.23   16 27 21.47 INF
22 20 8.55 61.05   22 20 16.59 INF
32 14 7.15 INF   32 14 12.03 INF

This table is based upon an MS Excel Spreadsheet I did a few years back. The distances match the focus scale on my camera.