No, although I do apologise were I said frequency I actually mean wavelength.
I deal with infra-red and cameras as part of my job.

Humans can see light between ~380nm and ~740nm.
IR covers from there to about 1mm.

IR LED's come in different wavelengths
I install these at work, the 850 is slightly visible (has a glow) whereas the 940 is invisible to the naked eye.

Using 850nm compared to white light reduces camera efficiency by ~25%, whilst at 950nM it can be reduced by over
60%.

Also less applicable here is the problem of focus shift, which is were a fixed lens camera becomes blurry while using IR.
The lower wavelength IR's reduce this effect.