My R3 Viewfinder Cleaning

[pridbor]

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I  have recently observed that there is some "dirt" around the edges when I look through the viewfinder. I thought and hoped that it was dirt on the mirror but after a thorough cleaning the "dirt" was still there.

 

I first observed it with a lens attached so I swapped for another, and then tested without a lens and lo and behold it was still there.

 

So my question is this: is the viewfinder "lens" (the lens with prisms etc, can't come up with a name for it) be removed for cleaning???

 

I have removed/installed this lens in my R4 but I can't seem to find anything about the R3, despite my recollection that one could get the R3 with different "lenses"

 

Thanks in advance 

 

Preben