I'm sure the C series is quite nearly APO as are most lenses made within the last 30+ years but they're not designated as such... not that it really matters in practical photography.
LINK
In lens design jargon, Apochromatic means color-corrected at 3 distinct wavelengths (like achromatic is color-corrected at two distinct wavelengths). Its source is in astronomical optics design.
Does it mean the same for you guys?
Newly made large format dry plates available! Look:
https://www.pictoriographica.com
Yes.
Jesus with the demand for wetplate lenses you'd make a killing manufacturing your own line of brass lenses.
That's not a Catch 22. That's a lesson in free markets: if you can't supply a demand then you don't have a business case.
Newly made large format dry plates available! Look:
https://www.pictoriographica.com
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