Observation Periscope is too dark

[OBarbas]

I've searched the forum for bugs relating to the observation periscope with no success. Two questions:

-- the view through my observation periscope is so dark - even at high noon - I can't see anything. Am I doing something wrong, or does this need a fix?

-- what is the depth at which I can raise and see through my observation periscope? I tried from normal periscope depth but the observation periscope didn't seem to clear the surface. However, maybe it was the fact that it was so dark I couldn't tell.

Thanks gentlemen!

OBarbas