No, not really....
For "family" shots it works very well and achieves acceptable focus (The difference in focus with only one filter removed is only 0.3mm)
I actually removed both filters to achieve maximum coverage (380nm through to NIR) for spectroscopy.
I can add an Astronomik MC clip in filter for normal shots ( only works with EF lenses) and retain focus for objective grating spectroscopy.
You don't need the additional UV-IR filter for astro work.
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