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Search: Posts Made By: Bob
Forum: Photography in general 23rd February 2021, 06:39 PM
Replies: 29
Views: 4,656
Posted By Bob
OK - I see what you are saying, but the figures I...

OK - I see what you are saying, but the figures I have calculated suggest that that is not the case in practice.

Yes, armed with a densitometer you will measure more accurate density increments...
Forum: Photography in general 23rd February 2021, 05:05 PM
Replies: 29
Views: 4,656
Posted By Bob
Sorry Marty, I'm not 100% sure I follow you. I...

Sorry Marty, I'm not 100% sure I follow you. I am not familiar with the timer (and I had to stop watching the video because of the very annoying "music").

To take the absolutely worst-case...
Forum: Photography in general 23rd February 2021, 04:08 PM
Replies: 29
Views: 4,656
Posted By Bob
Just think of "log scaling" as another term for...

Just think of "log scaling" as another term for f/stops but applied to time instead of aperture. Add 1 stop = twice the time, add 1/2 a stop = 1.4 times the time etc.

Also, if people want buttons,...
Forum: Photography in general 19th February 2021, 09:51 PM
Replies: 29
Views: 4,656
Posted By Bob
10 seconds to 11 seconds is approx 1/7th of a...

10 seconds to 11 seconds is approx 1/7th of a stop (10s + 1/7th-stop = 11.04s). 1/6th of a stop would be 11.2s so 11s is 0.2s out, which is some silly fraction of a stop. [OK, I had to calculate it...
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