Comments:
As expected, the result is very similar an almost indistinguishable to the 720nm filter.

This test revealed a RAW image which is red with slightly magenta cast and good contrast.

After applying 'Levels' > 'Auto' and 'Channel-Swapping, this time, compared to 680nm, 720nm and 760nm filters, cyan-blue is slightly reduced in intensity, whilst magenta is a touch stronger.

The black & white result is useful with good contrast. It presents a good tonal range for personal expression.