Quote Originally Posted by cepwin View Post
Ah yes! I see what you're doing Matt. That makes a lot of sense as it's based on "stop" which is what we base everything else in exposure on
Essentially, what I do is what Gerald suggested to you, because that progression is actually logarithmic in nature.

Here is another suggestion - do your test strips by progressively covering more of the print.

For example, you expose the whole print for 4 seconds, then cover over a portion for 2 seconds, then cover a bit more for 2 more seconds, than a bit more for 3 more seconds, etc.

Here is the table, which gives results out to a total of 64 seconds for the part of the test print with the most exposure: