Can you use a 127mm Ektar lens on a 4X5 camera?  If so, what size
mounting hole is needed?  What size filter does it take?  And how do
those danged "series" filters and lens hoods work, anyway?  

These questions and hundreds more are answered in this little 60-page
Kodak booklet, KODAK LENSES and SHUTTERS.   It's densely packed with
information, illustrations, charts, tables, graphs and tons of general
information on lens design and practice.  It was published in 1948
when Kodak was still making first-rate equipment -- the stuff still in
use today.   (Table of Contenets on auction page.)

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RK:MESE:IT