Ben-71
TPF Noob!
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[Ben-71]
I agree with you that 'APO' is sometimes used "loosely" for marketing To the best of my knowledge, no other lens does this.
I'd be glad to learn something new.
Please point to a lens that does it, and which does it as well
as the Coastal Optics' 60 mm f/4 UV-Vis-IR APO Macro does.
I'd be glad to learn something new.
Please point to a lens that does it, and which does it as well
as the Coastal Optics' 60 mm f/4 UV-Vis-IR APO Macro does.
[Alpha]
Shady marketing. At infinity, wavelength is negligible. Did you
notice that all of their graphs of UV and IR light are for focusing
at infinity?
It's just like statistics. Easily manipulated "data" that appear
valid to the untrained eye.
Shady marketing. At infinity, wavelength is negligible. Did you
notice that all of their graphs of UV and IR light are for focusing
at infinity?
It's just like statistics. Easily manipulated "data" that appear
valid to the untrained eye.
reasons.
However, even if focus shift (from UV to IR) at infinity was negligible,
then we're talking about the '60mm f/4 UV-Vis-IR APO Macro' lens,
which is specifically made to meet critical sharpness demands, with
any two - or all three - frequency ranges (UV-visible-IR), in the same
photograph.
However, even if focus shift (from UV to IR) at infinity was negligible,
then we're talking about the '60mm f/4 UV-Vis-IR APO Macro' lens,
which is specifically made to meet critical sharpness demands, with
any two - or all three - frequency ranges (UV-visible-IR), in the same
photograph.
I didn't find any other lens that does this.
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