> On 21 Apr 2020, at 15:43, Ralf R Radermacher <[email protected]> wrote: > > Am 20.04.20 um 22:34 schrieb Bob Pdml: > >> When the time comes to scan individual negatives for high quality output I >> will try and learn how to do this properly. It may be that I can never do it >> - certainly not by eye as I’m colourblnd - in which case the neg will have >> to go to a lab. > > What about these...? > > https://www.youtube.com/watch?v=nG3-SypqqI0
I don’t think they would help with this. They are not individualised. I just did the test on the supplier’s website and it said ‘strong red/green colour blindness’, which I know of course, and recommended a particular range which are supposedly good for people with weak, medium or strong red/green colourblindness. I don’t see how that could bring every wearer’s colour vision up to some reference standard, which is what would be required for critical colour work. Something that might work, if it were possible, would be the equivalent of digital hearing aids. My hearing tests provide a profile of my hearing shown as a graph of the differences from a reference hearing standard. The hearing aids are programmed to receive the sound from the world and change them based on my individual profile so that they enter my ears at the level of the reference standard. Non-digital hearing aids simply amplify everything, which is very crude. These glasses appear to be something similar to analogue hearing aids. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
