Help with Pentax PIF??? (1 Viewer)

[JerryLogan]

Can anyone help with the diameter of the eyecups on this rare model? I’m expecting that OEM replacements are unavailable so microscope or other eyecups might be good substitutes. I don’t have the binoculars in hand so I can’t just measure for myself.

Thanks for any help and best wishes,
Jerry

 

[henry link]

I have the 10x50 PIF. In photographs the 7x50 PIF eyepieces look like they're the same size, but I'm not certain about that.

The diameter of the flat top you see on the left eyepiece in the photo below is about 34mm. The area just below it is about 30mm and the diameter of the eyepiece housing below that is about 42mm. The eyecups have a unique design. In order to keep the eye shields easily aligned with the observer's face as the eyepieces are rotated for focusing there is a layer of what I suppose is slippery mineral oil between the rubber eyecup and metal eyepiece.

 

[JerryLogan]

Thank you so very much Henry! That is exactly what I needed to know.

Very best regards,
Jerry