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Old 6th December 2021, 08:50 PM
Mike O'Pray Mike O'Pray is offline
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Join Date: Oct 2008
Location: Daventry, Northants
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Terry, I have seen this mentioned before and in theory it sounds sensible to use the same method for both test strips and final print but in practice does the interval method say 3 strips of 4 secs to get to the 12 secs strip differ enough from then using one 12 sec exposure for the final print to make enough of a difference to be detected by the average( that's me ) printer's eye?

I think it was Ralph Lambrecht who said that he can see a 1/12th of a stop difference in a print. I doubt I can but assuming this is the average to good printer's ability then from the fstop tables it looks as if 1/12th of 12 secs exposure is 0.7 secs so even with good "printer's eyes" the difference in say 3 or 4 intervals of 4 or 3 secs compared to one straight 12 sec print has to be more than 0.7 secs to be noticeable so is it more than 0.7 secs? It doesn't seem likely to me

That's sounds to be more of a fine difference than I can see

Mike
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