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#11
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Rob, I mainly stick to the Les McLean one which covers most of the films I use. Sorry I haven't got a link as it was a few years ago. However, have a look on the net and you will find a good selection of these charts / tables. Also there are charts from the film manufactures. Neil.
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"The aim of art is to represent not the outward appearance of things, but their inward significance." Aristotle Neil Souch |
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Rob, Ilford have certainly simplified its reciprocity advice. I have never needed to use it so my examination of this subject may not be wholly reliable but I think that if you have an Ilford film all you might need is a very small card to give you the info you need
Neither am I an app user but if it is possible to store info on a phone then the info might be easily stored Mike |
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Ilford Technical Information sheet Film Reiprocity Failure Compensation gives the details for Ilford Films.
https://www.ilfordphoto.com/wp/wp-co...mpensation.pdf You need to read the instructions carefully when applying the factor as you need to use the Xy button on the calculator. Tony Last edited by Tony Marlow; 14th March 2020 at 09:47 AM. |
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In my experience the only manufacturer's recs you have to watch with reiprocity is Foma - but only on very long exposures.
The long Foma times tend to be too generous . Ian Grant has advised on this several times on FADU and he provides some good advice on Foma. But at the end of the day some testing / adjusting of times for your own style and equipment shoild be expected. Neil.
__________________
"The aim of art is to represent not the outward appearance of things, but their inward significance." Aristotle Neil Souch |
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Mike |
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looking at the data published by ilford the times are not the same. For example a reading of 4secs on the app gives 8secs where when you calculate 4 sec with ilfords factor of 1.31 you get 6.14 seconds. i would presume ilfords data would be more trustworthy than the app. Wish i found the datasheet from ilford earlier |
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Good news to know, Dave. Most people should be OK then. I do not possess this kind of a technological wonder. Until my son left his scientific calculator with me, having left school many years ago himself and no longer having any need for it, I thought that everything was contained in tables in a book such as logs, tans, sines etc
Mike |
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Ilford published the revised reciprocity tables last year. The Reciprocity Timer app seems to use the old recommendations. I don’t know if there’s any plan to update it. The times for other manufacturers films presumably remain as before.
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