1.85 is a projection format created by masking the print image in the projector gate. In video transfers, it is created by letterboxing the transfer.
Regular 16mm and 4-perf 35mm are both around 4x3 and can be composed for masking to 1.85. Super-16 negative has a full aperture of 1.68 : 1 (some say 1.66 : 1.)
1.85 or 1.78 (which is 16x9 full-frame) is achieved by composing for that in the viewfinder and then transferring to that aspect ratio by cropping / letterboxing (depending on whether you are transferring to 4x3 or 16x9 video.)
The advantage of using the wider Super-16 frame is that you have to enlarge it less / crop it less, to achieve 1.85 or 1.78 (16x9), compared to 4x3 16mm.
All you need is a Super-16 camera -- and normal spherical lenses -- with 1.85 framelines in the viewfinder, although 16x9 ( 1.78 ) framelines would be close enough.
Typical anamorphic cine lenses have a 2X squeeze, which is too much even for standard 16mm let alone Super-16 -- the unstretched image is wider than 2.40 : 1. For example, a 2X anamorphic cine lens on a Super-16 camera creates a 3.36 : 1 image ( 2 x 1.68 ). On a 35mm 4-perf camera, the anamorphic camera gate is almost square, about 1.20 : 1, hence why with the 2X squeeze, the unsqueezed image becomes 2.40 : 1.
