Nikon Pro Loupe 4x - diameter?

[-chrille-]

Anyone here knows what the diameter of Nikon Pro Loupe 4x is?

 

[Bushcat]

The physical diameter of the loupe, or the size of the image circle? The latter is around 46 mm on the 7911 model.

 

[-chrille-]

The physical diameter. I need a smaller loupe for my 4x5 camera. My Pentax 5.5x loupe, with a diameter of 70mm, is too big for the 4x5 ground glass.

 

[Bushcat]

The metal body is 64mm diameter, on the 7911 version.

 

[-chrille-]

Thank you, Bushcat