03-18-2017, 12:07 PM
The problem with many APO-lenses is that they do not correct for secondary order aberrations, which means that under certain conditions there still are some fringes to eb seen. There are only few exceptions, and those are generally rather expensive, and not easily obtainable.
Kind regards, Wim
Kind regards, Wim
Gear: Canon EOS R with 3 primes and 2 zooms, 4 EF-R adapters, Canon EOS 5 (analog), 9 Canon EF primes, a lone Canon EF zoom, 2 extenders, 2 converters, tubes; Olympus OM-D 1 Mk II & Pen F with 12 primes, 6 zooms, and 3 Metabones EF-MFT adapters ....