FoV Measurement and an Anomoly (1 Viewer)

[tenex]

Eyepieces of this focal length offering >65° AFoV and 19 mm eyerelief would be very complicated by binocular standards and take up a lot of space.
Low close focus values can be achieved by either a poweful focussing lens or a long travel of the focussing lens.

They are complicated, as also in NL 32. In the Swaros it's FOV that doesn't quite match their 42, but they did get the close focus, so it would seem there was room for that travel.