In article <5f2uhr$muj@postman.riken.go.jp>, hcampenh@postman.riken.go.jp says...

>does anybody have experience using the Mamiya 645 shift lens? Is it
>worth the money?

I have not used it, but I sure use the 35 and 28mm PC Nikkors,
and will probably eventually wind up with the Mamiya 50mm PC...

>Are there any other ways to shoot at high angle avoiding bending of
>vertical lines?

One: shoot a vertical frame with a super-wide (camera leveled), crop
out the unwanted end of the frame... (which is basically how a PC
lens works).
Hope This Helps