A numerics for our old lenses?

What do you mean by shade ?
Maybe this is that old lenses are not telecentric ?

Not a problem of lens, but of sunshade. It seems too "narrow" when used on the Sony with a normal 50mm lens: the four angles are a bit darkened. No more problem when the hood is removed. And no problem either when used on a Fed body.

I just wonder why. But a hood for 35mm will be perfect.

Jacques.

It seems it's just a problem with the A7.
Even with the manual lenses, it was in "automatic" between APS and APS-C formats. I obliged it to accept only full format (APS).
No more darkening now in the corners, even with a hood.

A discovery more. I supppose it's not the last!

Jacques.