Here's another one of my articles dealing with the only lens maker (at least so far) from Spain. Unfortunately they decided to call that company "Optical"... you can imagine that it's a pain in the ... to research with that name.
I tried my best to find some information about the company and their products but unfortunately there still are lots of open questions. Believe it or not, I wasn't able to find even a single ad or mention in any book or catalog... Perhaps someone who knows where to find anything like that is going to stumble upon the article in the future and let me know. I'm still surprised how a company managed to sell their lenses without any kind of advertisement.
One of the reasons might be that they seem to have been a subsidiary of Benoist Berthiot a notable manufacturer of projection lenses from France... so they likely were able to use their channels (sales people etc.) and didn't have to rely on publicity beyond that. Another reason might be that it was just too small scale to leave a lot of traces. I don't have any concrete evidence of production numbers, but it's nowhere close to the big names among projection lens makers, like ISCO, Schneider, Zeiss, Bausch & Lomb etc.
However in my eyes that doesn't make their lenses any less interesting or capable. They made some uniquely interesting lenses and I had a lot of fun using them. Here's the link to the article:
deltalenses.com/the-optical-story/
Here are a couple of sample shots taken with Optical lenses:
