How bad is this photo, which is a Kodachrome slide from 1986
I have approx 40 000 of these slides, almost complete coverage of Norwegian FLora
Arild, The value and quality of the photo(s), really only you can decide. Considering the effort, time and expense you incurred creating the collection.
What I would say is a collection such as you describe, an almost complete national Flora, of my own, would to ME be priceless.
The example you offer isn't pictorially great in my view, BUT it shows the habitat, the form and habit of the plant and there is a nice view of one of the flowers. A few more in focus would have been nice but in the field that isn't always easy... My guess is also the later photographs are probably better than the early ones? There are probably some gems among them too. Ones own criticism comes into play and techniques improve over time. This is a Flora collection, made in the field, not an exhibition of perfect studio prints.
Having digitised them... They need to be made available for others to view, Adobe Portfolio or similar perhaps? The good the bad and even the ugly, if it has Flora merit. In my view.
On the slide scanning side, my collections are modest. I have made pretty acceptable copies using my D1, (now D3) PB4 copy bellows and a flash bouncing off a whiteboard for lighting. Doing it tethered to my Mac I can repeat, adjust and fine tune each exposure from my desk. I also have a friend with a Noritso? scanner, a very expensive high quality tool. He will scan individual negatives or slides for me with very high quality at about the same price of processing an equivalent roll of film. Roughly £10 for 36 - 35mm slides or negatives. For a limited number that's not bad, occasionally, but for 40,000... According to my calculator thats about £11,000.