all images should have an alt attribute that describes the image, use keywords like "Apertus Axiom Beta open Hardware Camera"
be more creative than me!
i think SEO best practice is a short sentence with lots of keywords, but it should make sence for humans.
https://www.google.de/search?q=apertus+axiom&tbm=isch
this looks good, but the images should be displayed for more keywords.