It's get confusing as some wrote in this old
LFPF thread.
Bob often suggests the
Rodenstock Depth of Field Calculator which is available at that link, but seemingly out of production back in 2007 as indicated in the early post.
I cannot find out how big the circular slide rule is, one says it's made of plastic. Any thoughts on durability?
I may have difficulty reading the fine print on the slide rule in the field.
As I recall from my brief Sinar P experience there are scales on a P to use for deciding ideal focus directly on GG the near and far points.
Does a Norma have this function also?
The slide rule costs
more than my reliable new Walmart iPhone SE which has zoom to read fine print enabling an App to be read anywhere, even in the dark.
Plus, having the slide rule instructions seems very important.
I grew up using slide rules...the only one I have now calculates compound interest and mortgages.
So we ask for more discussion.
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