Hi @WDaland,
The lens in the first image has a focal length of 50mm and a maximum aperture of f 1:4.
The one in the bottom photo is 105mm f 1:5.6.
Apart from the lens, you have to think about which camera you intend to use it with.
In this forum we are several users using 50mm enlarger lenses to digitize Super8.
Specifically in my case, I use a Rodenstock Rodagon 50mm f 1:2.8 lens in conjunction with a Raspberry Pi HQ camera, which requires an approximate magnification of 1:1.
The maximum aperture of f 1:4 should not worry you. In my case, during captures I have the lens set to f 1:5.6, although f 1:2.8 maximum aperture lenses are said to give better image quality than f 1:4.
In my opinion, the 50mm lens can serve you perfectly to get the job done.
I leave you a link with examples of use of these lenses.
Regards.