10x De-Luxe Achromat loupe/comparator lens mount_Mamiya RB which is panchromatically sensitized

which is panchromatically sensitized

5 Tominon won't cover 4x5 at infinity- but it will cover up close (at 2:1 or higher magnifications)

Got a Leitz UZEOO

A super-fast wide angle lens with professional image quality- even wide open

10x De-Luxe Achromat loupe/comparator lens mount_Mamiya RB which is panchromatically sensitizedWell, I don't know who made this loupe, but it's pretty nice: it's a clean 10x achromat with excellent sharpness, and it includes two comparator discs if you're planning to use it as a pocket comparator. It's an excellent loupe, with a transparent skirt that makes it suitable for reflective or transmissive materials. Includes case.