Some help please.
I'm trying to use a depth micrometer to establish the register of the
groundglass focusing screen in an old camera. The glass is held by spring
clips so it's quite difficult to tell when the micrometer's rod has just
touched the glass surface. If I can establish this dimension, I'll try a
similar measurement on the film holder. In this case the surface is thin,
ribbed metal sheet which again could flex slightly before my fingers are
aware of any resistance. (I don't have any problem using the depth
micrometer against hard, unflexing objects.)
Any ideas please - many thanks.
(I've googled but the examples seem to concentrate on checking the
micrometer against hard steel reference pieces. I also have a small clock
gauge but no means of holding it firmly.)
17 years ago