Thanks Barry, that too is true.
APS-C standard lens would be 35mm-ish (equiv. 52.5mm) or 31mm (46.5mm) although in the latter case it was a lens designed originally for film, so that wasn't the reason for its odd focal length.
The 560mm is interesting as a 400mm with 1.4 TC would be 560mm. Co-incidence or revealing how it was designed?
Photographic Illusions: The Walkabout Lens
Re: Photographic Illusions: The Walkabout Lens
Best regards
John
John