Originally posted by MJKoski I do not know why I would insert an inverted periscope behind viewfinder to see at bad angle. Do you drive a car and turn your steering wheel at 90 degree angles?
There are times when such a finder attachment is very useful.
a) Camera is at low elevation and it is not practical to squat or lie on your stomach to look through the finder.
b) Copy stand work where the camera is pointed down but too high for you to get your head over the set up to look down into the finder. In this case, the inverted image helps.
c) Astro or microphotography where the camera is mounted onto a telescope or microscope and orientation is less important.
On my Nikon F3HP when shooting film, I have and use not only my high point finder, but also a waste level finder (image is flipped) and a right angle finder too. An articulating back is essential if the camera does not have alternative viewfinders which the photographer values. For example, shooting candids in the street from ʻthe hipʻ is much more discreet with the camera held near your waist instead of raised at eye level to shoot.
The car steering wheel analogy.....you mean like the old VW microbus?