What was the shortest lens ever made for a Kodak slide projector?

[williaty]

I have a widget that uses Kodak Ektagraphic/Carousel slide projector lenses. What is the shortest effective focal length lens ever made for this system? I currently have a Buhl 1.4" (35mm) EFL Superwide lens for it. Was there ever anything sold that was wider/shorter?

As sort of a follow on to that, I find a lot of Kodak brand lenses around 100mm and then my Buhl Superwide down at 35mm along with a few others just above that EFL. Why is there a big gulf in between? What were the uses back in the day that produced two such different groups of focal lengths?

 

[darkroommike]

The super shorties were used in projection "study carrels" for interactive learning using slides. I think Kodak made a 36mm and Golden Navitar made a shorty, too. Slightly longer lenses were nice when trying to film a big screen. And the fixed focal length lenses, as a rule, were faster than the zooms.

 

[AgX]

I do not know such booths. But slide projectors were also used for shows to a small group, with a miniature screen entrolled on a desk. Here a wide-angle lens might have been useful.