Determining exposure time
Set your light meter to the film's ASA/DIN
Take a reading
Locate the line that your reading is on
Read across to the right hand column for your exposure time.
Add time for reciprocity failure

                                                                                                                           PinHolga
       f 2.8                     f 8                        f 16                  f 64                              f 215

1/128000 Secs     1/16000 Secs       1/4000 Secs           1/250 Secs                1/30 Secs
1/64000 Secs       1/8000 Secs         1/2000 Secs           1/125 Secs                1/15 Secs
1/32000 Secs       1/4000 Secs         1/1000 Secs           1/60 Secs                  1/8 Secs
1/16000 Secs       1/2000 Secs         1/500 Secs             1/30 Secs                  1/4 Secs
1/8000 Secs         1/1000 Secs         1/250 Secs             1/15 Secs                  1/2 Secs
1/4000 Secs         1/500 Secs           1/125 Secs             1/8 Secs                    1 Secs
1/2000 Secs         1/250 Secs           1/60 Secs               1/4 Secs                    3 Secs
1/1000 Secs         1/125 Secs           1/30 Secs               1/2 Secs                    6 Secs
1/500 Secs           1/60 Secs             1/15 Secs               1 Secs                       12 Secs
1/250 Secs           1/30 Secs             1/8 Secs                 2 Secs                       23 Secs
1/125 Secs           1/15 Secs             1/4 Secs                 4 Secs                       46 Secs
1/60 Secs             1/8 Secs               1/2 Secs                 8 Secs                       2 Mins 32 Secs
1/30 Secs             1/4 Secs               1 Secs                    16 Secs                     3 Mins 4 Secs
1/15 Secs             1/2 Secs               2 Secs                    33 Secs                     6 Mins 8 Secs
1/8 Secs               1 Secs                  4 Secs                     1 Mins 5 Secs         12 Mins 17 Secs
1/4 Secs               2 Secs                  8 Secs                     2 Mins 10 Secs       25 Mins 34 Secs
1/2 Secs               4 Secs                  16 Secs                   4 Mins 21 Secs       49 Mins 8 Secs
1 Secs                  8 Secs                   33 Secs                   9 Mins 42 Secs      2 Hrs 38 Mins
2 Secs                  16 Secs                 1 Mins 5 Secs       17 Mins 24 Secs    3 Hrs 17 Mins
4 Secs                  33 Secs                 2 Mins 10 Secs     35 Mins 49 Secs    7 Hrs 33 Mins
8 Secs                  1 Mins 5 Secs      4 Mins 21 Secs     1 Hrs 10 Mins         13 Hrs 6 Mins
16 Secs                2 Mins 10 Secs    9 Mins 42 Secs     2 Hrs 19 Mins         26 Hrs 12 Mins
32 Secs                4 Mins 21 Secs    17 Mins 24 Secs   5 Hrs 39 Mins         52 Hrs 25 Mins
1 Mins 4 Secs     9 Mins 42 Secs    35 Mins 49 Secs   9 Hrs 17 Mins        105 Hrs 49 Mins
2 Mins 8 Secs     17 Mins 24 Secs  1 Hrs 10 Mins       19 Hrs 35 Mins      210 Hrs 38 Mins